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<pjs>
Hey all.. Trying to update redmine from 2.6-stable to 3.0-stable. Doing bundle update gives me compat errors with json module, which isn't installed. See output & gem list here:
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<jhass>
isn't there a #redmine?
<pjs>
any ideas? I'm not really a Ruby guy so beyond the basics, I'm a little lost.
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<jhass>
I'm tempted to tell you let them deal with their broken bundler setup
<pjs>
jhass, yes, but this isn't necessarily redmine specific. I did ask there
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<zenspider>
pjs: you're listing json in your gemfile and other stuff is depending on a different version.
<jhass>
it kinda is in the sense that you as a user shouldn't need to deal with such issues, so if redmine doesn't get its act together to hide them from you, it's kinda their problem to explain them to you
<jhass>
sfmk: since you call your class before you define it
<zenspider>
jhass: I doubt the problem is the resolver... the update past 1.9 seems mostly annoying to teams at this oint
<zenspider>
point
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<jhass>
zenspider: yeah, we had a fight with them over the whole writing the bundler version to the lock thing
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<jhass>
zenspider: 1.10 has optional groups though <3
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<pjs>
could the issue be that active support version 3.2.22 and 3.2.21 are already installed and that's an issue for the 4.x.x versions? (just thinking out loud)
<jhass>
pjs: let's try something different. copy your Gemfile somewhere so you have a backup, get a new Gemfile (and Gemfile.lock if they provide one) from the upstream git or a release tarball or something. Do the minimal mess you have to do for redmine to it and run bundle install
<jhass>
pjs: no, it has nothing to do with which gems are installed or not
<jhass>
that's completely irrelevant really
<mg^>
last time I installed Redmine, I grabbed a docker container and used that instead...
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<jbrhbr>
Ox0dea: well, i either missed it in the docs or it isn't documented, but i dug through the code and found that Pry has a truncated output option built-in, although it's not partial display, it's a more draconian approach
<jbrhbr>
you just type 'change-inspector clipped' into the pry console
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<pjs>
jhass, Just tried.. same thing. The Gemfile from the repo and the one locally were an exact match as well
<jhass>
pjs: wat
<jhass>
then they made a broken release or something
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<jhass>
really, go and complain to them to fix their shit
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<RickHull>
anyone want to help me confirm a bug?
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<RickHull>
hmm, i seem to have found some `ri` weirdness
<RickHull>
on a debian system: type "ri" (no quotes) then <tab key> then "-h"
<RickHull>
then <enter key>
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<RickHull>
alternatively: "ri<space><tab>-h"
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<RickHull>
<enter> ... what should happen?
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<RickHull>
compare to: "ls<space><tab>-h<enter>"
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<blubjr>
whats your problem
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<blubjr>
ls -h is for printing file sizes neatly..
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<RickHull>
i think it's that `ri -h` opens an interactive console
<RickHull>
but something with tab completion is messing with it on debian
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<RickHull>
what happens when you type "ri<space><tab>-h<enter>" ?
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<RickHull>
for me, i get a blank prompt, and I have to SIGTERM out of it
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<RickHull>
it might just be `-h` weirdness specific to ri
<RickHull>
though i would say that `-h` is the standard help output switch
<RickHull>
but my real problem is with Rye -- it has different behavior for Rye::Set#disable_safe_mode versus Rye::Set#safe = false
<havenwood>
RickHull: ri --help
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<RickHull>
havenwood: what happens with "ri<space><tab>--help<enter>" ?
<RickHull>
i get a blank prompt, waiting for (who knows what) input
<blubjr>
if its the tab that does it i would imagine the problem is with whatever completion your bash is configured with
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<blubjr>
-h is not standard for help on unix
<RickHull>
i think it is the tab that is pivotal
<RickHull>
i should have a bog standard debian system in this respect
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<RickHull>
it is not problematic for e.g. `ls` only `ri` so far
<blubjr>
i dont know about how debian's bash comes preconfigured, but that would be where to look
<blubjr>
ri wont even be seeing the tab
<RickHull>
compare "ls<space><tab>-h<enter>" to "ri<space><tab>--help<enter>"
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<RickHull>
totally different behavior on my system
<blubjr>
yes, bash has programmable tab completion
<blubjr>
again, ri won't even be seeing the tab. bash is screwing something up
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<RickHull>
only for ri, not for ls?
<RickHull>
based on the behavior, it looks like ri is doing a $stdin.gets before it ought to
<blubjr>
bash has programmable tab completion, ie, it can be set up to complete differently for different commands
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<RickHull>
hm, I haven't done any setup there
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<blubjr>
the debian maintainers probably did
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<RickHull>
the closest thing I've done to mess with tab completion for bash is git completion
<RickHull>
anyway, the `ri` thing is just a curiousity
<RickHull>
i was trying to find a valid command on my system that is not on the Rye whitelist of commands
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<RickHull>
the main issue I'm having is that Rye::Set#safe is reporting false, yet I'm hitting an exception on a line that strongly implies @safe == true
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<RickHull>
there are two ways to disable safe mode for Rye: obj.disable_safe_mode vs obj = Rye::Foo.new(safe: false)
<RickHull>
only the latter seems to work
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<RickHull>
the former seems broken and looks like a bug
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<RickHull>
safe mode means that @safe is true and method_missing will raise quickly if the command is not on the whitelist
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<RickHull>
i was trying to use `ri` for a command that is not on the whitelist -- and then I hit the weirdness with tab completion
<RickHull>
a better command that is not on the whitelist is `find`. e.g. Rye::Box.new(host).find '.'
<RickHull>
that will fail, because find is not on the whitelist
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<RickHull>
you can do Rye::Box#disable_safe_mode # seems broken
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<RickHull>
or Rye::Box.new(host, safe: false) # works
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<RickHull>
in my specific case, I am working with a Rye::Set, a container of Rye::Box
<RickHull>
but the API takes pains to be consistent across Sets vs individual boxes
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<RickHull>
> I haven't been able to wrangle Net::SSH to do my bidding. "My bidding" in this case, is maintaining an open channel between commands. I'm using Net::SSH::Connection::Session#exec for all commands which is like a funky helper method that opens a new channel each time it's called. This seems to be okay for one-off commands but changing the directory only works for the channel it's executed in. The next time exec is called, there's a new channel
<RickHull>
which is back in the default (home) directory.
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<RickHull>
anyone else gone through similar frustrations?
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<xelfer>
ive installed 2.2.3 (on osx el capitan) 3 times and i'm still getting "kernel_require.rb:54:in `require': cannot load such file -- bundler/setup (LoadError)" on gem install bundle, any ideas what might be wrong here? my google isnt helping
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<RickHull>
xelfer: paste a gist, with some basic system info
<RickHull>
then a gist with the commands you're running, and the error messages / failures
<RickHull>
the info you've posted so far is insufficient for troubleshooting, at least from here
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<xelfer>
ah.. even my gist command is no longer working. haha. one sec
<RickHull>
i'm not sure what commands you need for basic system info for Mac OS. `uname -a` `which gem` `gem env` come to mind, at least
<xelfer>
trying that out before trashing my entire rbenv
<RickHull>
though given bash conventions and evaluation rules, i honestly have given up any prediction / expectation
<RickHull>
if it works, great. if not, keep trying
<RickHull>
last resort: try seriously to understand the execution / evaluation model
<xelfer>
yeah, if this fails ill go with Radar's blog and trash .rbenv
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<snockerton>
once I have a RestClient::Resource defined with a url, how can i update a single attribute (url) of that object without recreating it from scratch?
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<RickHull>
snockerton: probably you can't -- resource is a noun-oriented approach
<snockerton>
i define a RestClient::Resource object with a bunch of custom options + headers, then need to pass entire (new) urls to it, rather than appending to the url
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<snockerton>
i have to do GETs on lots of urls, and was hoping to just pass the entire thing to RestClient without carving up the URI and using the resource[suffix] syntax
<RickHull>
the resource abstraction wants to be 1-1 from URL - resource
<RickHull>
so you don't want to make 1 resource that represents many URLs
<snockerton>
drat
<RickHull>
there are many alternative models
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<snockerton>
i also tried doing one offs of `RestClient.get( url, headers )` - but I need to add verify_ssl: false
<snockerton>
this only seems to work as an option with Resource.new
<RickHull>
yeah, that is probably the right approach
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<snockerton>
cool gem btw
<RickHull>
please let me know if it works for your use case
<RickHull>
and if not, why not
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<Radar>
xelfer: how'd it go?
<RickHull>
one problem is: lacking robust https support
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<snockerton>
i just need verify_ssl: false
<RickHull>
that should be trivial
<RickHull>
not sure about your use case
<snockerton>
laziness
<RickHull>
well, get unlazy
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<RickHull>
step 1: don't be lazy. step 2: get unlazy
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<RickHull>
important corollary: if the reason you are asking a question here is laziness: don't
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<snockerton>
s/laziness/internal political issues/
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<RickHull>
fair enough...
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<RickHull>
but setting that particular option should be no trouble for RestClient::Resource -- without Mudbug
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<ff7f00>
Hi, I just created a new gem using the "bundle gem tool-subtool" command. This organizes my gem into Tool::Subtool where Tool and Subtool are both modules. The problem is that for this gem it makes more sense for Subtool to be a class. However my directory structure also includes tool/subtool/package.rb where Tool::Subtool::Package.new would also make sense. Should I instead leave Subtool as a module and do something like Tool::Subtool::SubtoolInstance.new?
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<ff7f00>
(sorry, struggling a bit on how to explain this and that's the best I could do)
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<xybre>
ff7f00: The general pattern is to use the top level namespace of your gem (Subtool in this case) for one or two invokation/helper methods and then put all the actual functionality into objects in that namespace.
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<ff7f00>
xybre: all right, yea that's the feeling I got. I think I found a class name that will make sense here. thanks
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<shevy>
ff7f00 I often found that, the simpler to use an API the better; Tool::Subtool::Package.new would strike me intuitively as easier to use than Tool::Subtool::SubtoolInstance.new; you could also add to the Subtool namespace and make e. g. a module method there, depending on what it does. like, I dunno ... Tool::Subtool.create_project('dragons')
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<blubjr>
whats the best way to capitalise the first alpha char in a string
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<blubjr>
so im calling a method on an object, using case to pick which method to call. in lisp i would write (funcall (cond (case-1 fn-1) (case-2 fn-2)) obj), is that sort of thing done in ruby, and if so how do you write it, or should i just have when case_1; obj.fn_1; when case_2; obj.fn_2
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<shevy>
you could try via .send
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<shevy>
via .instance_methods(false) you should be able to reliably determine what methods your object responds to, then you could use .select to find the proper match
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<JamesArlen>
I HATE RUBY
<JamesArlen>
why does such an awful language exist?
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<JamesArlen>
so much room to make mistakes with ruby that it's not even funny
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<JamesArlen>
finding syntax errors in ruby is horrible
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<shevy>
lol
<shevy>
our good old webchatster friend has returned
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<blubjr>
ty shevy
<JamesArlen>
why are you a fucking NIGGER shevy
<shevy>
countdown started!
<havenwood>
!ban JamesArlen !P racism
JamesArlen was banned on #ruby by ChanServ [JamesArlen!*@*]
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<Shapeshifter>
Is there a name for when doing something like Config[:some_prop]? and what exactly would this do? Does it check whether the property exists or does it check if it's true?
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<apeiros>
Shapeshifter: [] is a method in ruby, it just has a sugared syntax.
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<apeiros>
i.e., the name of the method is "[]". you can call it like any other method too: Config.[](:some_prop). and Config[:some_prop] is just syntax sugar for that.
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<apeiros>
and like all methods, what [] does depends on the object you call it on. in most classes it's looking up a value by key or index (like Hash/Array)
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<xybre>
Shapeshifter: most types that use [] will return nil if nothing is found
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<al2o3-cr>
Shapeshifter: fetch can return a default value happy days
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<xybre>
s/use/respond_to
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<TomyWork>
hi
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<TomyWork>
i've traced a proxy problem from gitlab to httparty to Net::HTTP. The problem is that it seems to ignore the "no_proxy" environment variable. Is there anything I can do about it? like setting a different environment variable that it doesnt ignore?
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<xybre>
TomyWork: what versions?
<TomyWork>
gitlab 7.1.1, let me check the other ones
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<TomyWork>
however, the part that invokes Net::HTTP is HTTParty, which is a gem used by gitlab. that's 2 layers removed from what i'm willing to mess with
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<xybre>
Hmm, I don't know too much about gitlab itself, but I'm not seeing no_proxy mentioned in its source code.
<xybre>
Ditto with HTTParty.
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<xybre>
It is mentioned in URI though.
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<Bish>
i need to patch a gem, what's the best approach to do that?
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<Bish>
install locally? patch?
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<pontiki>
fork it, install that version? send back the PR and wait for the owner to merge it
<pontiki>
idk, i tend to forget to look for updates when i do that :(
<Bish>
how do i fork a gem?
<adaedra>
Go the the GitHub page, click "Fork"
<Bish>
or do you mean like, on filsystem level
<Bish>
yeah okay.. sigh
<pontiki>
i'm assuming it's source is on github or bitbucket
<Bish>
yeah and i have a feeling that people would never use my patch
<pontiki>
yeah, and then you're sort of stuck with that dance forever
<adaedra>
Do a PR afterwards to have it merged upstream?
<xybre>
Bish: is it possible to wrap the gem instead of modifying the source?
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<Bish>
xybre, im afraid not, because the gem will use that class, even if i create my own, could make monkeypatch it, but i already done that too much :D
<Bish>
and the fact there is a comment "this is not like rails does it herpderp" does tell me, they don't want it that way
<Bish>
since the comment is longer than the code that would actually do it
<xybre>
Bish: if you can't work around it, then you'll have to either not use that gem, or else monkey patch it :(
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<Bish>
same thing :D
<adaedra>
But yeah, you have to define the constant somewhere if you want to use it
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<Bish>
so i will stick with argumenterror :D
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<adaedra>
It's good to have specialized error classes, it allows to filter errors
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<Bish>
yeah i know, but i am lazy, and i have to get this done ;D
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<Bish>
instead i am monkey patching.
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<Bish>
>> exception handling to the rescue
<ruboto>
Bish # => /tmp/execpad-40d92a83d453/source-40d92a83d453:3: syntax error, unexpected keyword_rescue ...check link for more (https://eval.in/478394)
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<Bish>
giggles are always worth it
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<adaedra>
This is not you average lazyness. This is... advanced lazyness.
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<adaedra>
laziness, even.
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<Bish>
you'd be surprised
<Bish>
this is not even my final form.
<TomyWork>
xybre i figured it out. Net::HTTP supports no_proxy, but not the suffix syntax wget etc. support
<TomyWork>
no wildcards either
<TomyWork>
since i just need a single host, i added that explicitly
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<shevy>
hmmm
<shevy>
rescue nil is quite cool
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<shevy>
I wonder if we could do it shorter
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<Bish>
x=['exception handling to']['the']
<Bish>
:3
<Bish>
or was it irony because everything undefined is nil?
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<xybre>
TomyWork: interesting, good to know
<shevy>
Bish well you made bare words work above there via rescue nil
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<shevy>
the only other way I know of how to do this is by using method_missing
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<shevy>
Imagine if it would be some special token or something
<shevy>
hmm... can't think of something shorter than "rescue nil" though
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<adaedra>
shevy: like Ox0dea's rugen does?
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<Bish>
next challenge, how do i save that stuff in a database :/ why did i take sql
<Bish>
gee.
<adaedra>
Sequel!
<shevy>
adaedra what is rugen? if it is by Ox then it is most likely really scary
<Bish>
yeah i already use sequel, its great, but doesn't help me much with unspecified amount of columns
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<adaedra>
shevy: github -> Ox0dea/rugen
<adaedra>
s/Ox/0x/
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<Bish>
storing json in mysql feels so dirty :/ 5.7 has a datatype for that but still
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<arup_r>
I am trying to refactor this ugly code, https://gist.github.com/aruprakshit/156ea9040da0213aebc5 .. I tried twice to make it beautiful, but failed. I only see 3 classes can be extracted from there.. but not able to see what behaviours are common.. Not able to apply Inhritance there..
<arup_r>
any hints.. from where to start ?
<Bish>
use case and when?
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<arup_r>
asking me ?
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<NET||abuse>
hi guys. i'm trying to debug yaml files,,, puppet stuff.... i use ruby -e "require 'yaml'; YAML.load_file '/etc/puppet/hiera/locations/aws/prod/jenkins.yaml';" and i get /usr/share/ruby/psych.rb:205:in `parse': (/etc/puppet/hiera/locations/awseuwest1/dotcom/prod/jenkins.yaml): did not find expected key while parsing a block mapping at line 2 column 1 (Psych::SyntaxError)
<Bish>
asking you if you know that would be a good idea, since it's exactly the case for what case is for
<Bish>
for the rest: you cannot make it pretty, since having the version decided in the protocol isn't pretty to begin with
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<gregf_>
arup_r: i'd just create 3 private methods? assuming those variables are globals
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<arup_r>
you mean each inner if-else is one method ?
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<arup_r>
those if-else code has repetition ,, but not much common in between though, so it is hard to refactor
<apeiros>
NET||abuse: so your yaml files has invalid syntax starting latest at line 2, column 1
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<apeiros>
NET||abuse: can't say more without seeing the yaml
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<NET||abuse>
apeiros: i've copied and pasted the first few lines from the alternate jenkins.yaml in stage directory, and it's not working.
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<arup_r>
but I was trying it to do.. when I ended up with 3 classes, but really couldn't throw out those if-else .. there are sticked like a tatto
<apeiros>
NET||abuse: given that it says *line 2*, that's quite expected.
<NET||abuse>
line 2 of the yaml file yes? I've take the first 10 or so lines from a working file and copied and pasted them in and it's not working.
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<gregf_>
arup_r: right, also i dont get that return. it will 'always' return?
<apeiros>
NET||abuse: I can't help with "not working" either.
<gregf_>
oh, theres more code that follows :|
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<apeiros>
as said: gist yaml and exception
<arup_r>
gregf_: it is a Rails code, but Ruby thing.. So in benteen when I am rendering, need to HARD return
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<apeiros>
arup_r: no you don't.
<apeiros>
arup_r: you need to control your flow so that nothing else happens
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<arup_r>
apeiros: after the if-else also some code they also render, so before them if I want to render and I need to return to avoid double render exception
<apeiros>
"I need return" translates to "I do stuff after those lines unconditionally, but shouldn't under certain conditions, therefore I do (not need) return"
<apeiros>
arup_r: see? nailed it.
<apeiros>
don't justify bad code with the presence of other bad code.
<NET||abuse>
apeiros: I mean, i have stage/jenkins.yaml and /prod/jenkins.yaml The former file works, prod/jenkins.yaml has the error "line 2 column 1" error,,, then i copied and pasted the first 10 or so lines from stage/jenkins.yaml into prod/jeknins.yaml overwritting those lines.. and it still returns the same error
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<apeiros>
NET||abuse: then something isn't working the way you assume it to work. anyway, with the given information, I can't help.
<pontiki>
NET||abuse: gist the bloodly file, it'd help oh so much
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<arup_r>
this is the codebase I got and I need to add feature,, it is not me .. it is someone else, but I am trying to give it a shape.. but I am failed now. :)
<arup_r>
it is a result of not reviewed codebase.. it became a shit now
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<apeiros>
arup_r: no wonder if you stop half-way.
<apeiros>
arup_r: either give it a shape or leave it be. half-arsed stuff won't help anybody.
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<apeiros>
in the opposite - it'll only make things worse
<arup_r>
you are correct
<arup_r>
it is hard
<arup_r>
I will add featured in between those if-else..
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<NET||abuse>
apeiros: i'll setup a gist or something, give me a few mins.
<arup_r>
what a job I got.. :/
<NET||abuse>
pontiki: no need for abbrasiveness.. we're all friends here..
<pontiki>
are we?
<pontiki>
then why don't you do what's been asked several times?
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<NET||abuse>
pontiki: sometimes it's hard to paste things due to content, passwords, company privacy,, so it's not always obvious
* apeiros
wouldn't have categorized that as abrasive
<arup_r>
apeiros: thanks for the suggestion though.
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<pontiki>
that is in the first two lines of you yaml file??
<apeiros>
NET||abuse: that just means you have to work a bit harder.
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<apeiros>
as in: replace sensitive information by non-sensitive information.
<NET||abuse>
apeiros: yup, i'm donig that, just taking a minute to prepare the files
<apeiros>
but as pontiki suggested - yaml reports an error in the 2nd line. you can just cut everything after.
* apeiros
brb
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<NET||abuse>
pontiki: the mystery is that the first 2 lines of the file are identical to the first 2 lines of a file that works fine.
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<apeiros>
NET||abuse: that sounds more and more like it's not loading the file you think it's loading
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<GinoManWorks>
Hey, I'm on windows and I noticed that there are two *.a files in the "lib" directory of my ruby installation. one is libx64-msvcrt-ruby210.dll.a and the other is libx64-msvcrt-ruby210-static.a... shouldn't those have a .dll, and .lib extension respectively?
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<symm->
dll files can be any extension if you load them explicitly with LoadLibrary
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<symm->
I have libx64-msvcrt-ruby210.dll.a too on windows... and it's not even a PE/DLL file
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<ljarvis>
can anyone recommend a gem for handling cc validation? (luhn alg but with more functionality for ex)
<apeiros>
ljarvis: if all you want is luhn, then that's trivial to implement. recognizing the cc type is a bit of more work. but mostly just a lookup. I have some code lying around already (not yet used in prod, though)
<ljarvis>
yeah, maybe I shouldnt care about that
<ljarvis>
right now we ask for the type anyway, and I don't care much about validating against the type. Maybe in the future
<apeiros>
oh, though, my code is based on a library I haven't released yet :-/
<ljarvis>
I guess I'm over complicating it and I probably just want luhn
<yorickpeterse>
ljarvis: regex
* yorickpeterse
runs
<apeiros>
yeah, well, luhn really is trivial. and given how trivial it is, I'd assume the link you showed will work just fine.
<jhass>
dreamscape: that's hard to estimate, given you didn't describe your problem at all
<millerti>
I'm encountering something weird. I'm calling a method using the splat operator. The array being splatted may have 2 or 3 elements. So I have 2 and 3-argument versions of the method being called. However, when I call using splat, I get an error that I'm passing 2 instead of 3 arguments. Have I encounted a weird Ruby corner case?
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<havenwood>
dreamscape: Have it installed yet? What's not working?
<mozzarella>
millerti: show code and error
<jhass>
millerti: probably not, can't judge without seeing code and real error message
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<argoneus>
I'm starting out with ruby and all the time I see code like Configurer do |config| config.bla end, is there a name for this?
<havenwood>
argoneus: A block?
<havenwood>
argoneus: The `|config|` is a block argument.
<jhass>
argoneus: not really, it's just calling a block and yielding an object with accessors to it
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<dreamscape>
yes i have Ruby
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<havenwood>
dreamscape: And it's version 1.9+ as well?
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<dreamscape>
not to worry I've got it working now :) thank you for your help
<Ox0dea>
argoneus: I've seen it referred to as a "configurator", but that's not particularly great.
<argoneus>
hm
<havenwood>
dreamscape: Yell if you get stuck. Happy coding!
<dreamscape>
thank you
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<Ox0dea>
centrx: For what it's worth, Ruby is sufficiently malleable that you can essentially bolt on "method overloading": https://eval.in/434678
<argoneus>
I guess I need to read up on a bit more
<Ox0dea>
It's not something you should actually do, of course, but I think it's a really neat trick.
<argoneus>
this "object do |bla|" syntax is new to me still
<centrx>
neato
<Ox0dea>
argoneus: s/object/method/
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<argoneus>
ah
<argoneus>
so basically the method do |stuff| stuff
<argoneus>
basically the method yields values and I process them, right?
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<jhass>
argoneus: usually you just yield an object with accessors, class Config; attr_accessor :foo; end; def configure; config = Config.new; yield config; config; end; result = configure |config| config.foo = "bar"; end; result.foo #=> "bar"
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<jhass>
er plus the missing do
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<jhass>
I returned the Config instance here, but usually you would save it to an instance variable or something
<argoneus>
why yield config; config;?
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<argoneus>
so it returns config?
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<jhass>
yield config calls the block and passes config as the first argument
<jhass>
the second config just returns it from the method call
<jhass>
replace ; with newlines
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<argoneus>
so that way I can both use it with a block
<argoneus>
or just do something like config = configurer
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<argoneus>
ruby is hard
<jhass>
argoneus: well, not in this case, the yield is unconditional, so when there's no block ruby will raise
<argoneus>
oh
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<adaedra>
ruby's not so hard.
<jhass>
I just returned it for demonstration purposes here really
<argoneus>
I like some of the syntax
<argoneus>
like array.collect!, the !
<adaedra>
aah, the !.
<argoneus>
its like collect it you dork or ill have your head!
<adaedra>
It usually denotes a mutating operation.
<adaedra>
like collect! is like collect, except it does it in place.
<jhass>
and/or require "bundler/setup" at the top of your Rakefile
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<NET||abuse>
jhass: thanks for that.
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<NET||abuse>
jhass: thanks for that tip earlier, still having issues with the Rakefile but it got past that first issue :(
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<NET||abuse>
I'm just trying to spin up a vagrant setup to test the rake file with centos ruby rather than archlinux ruby
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<jhass>
hah, good luck and sorry for your pains in advance
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<NET||abuse>
jhass: not normally a ruby guy, but i need to get used to it, too prevelant in devops'y type tooling.. pretty much need to be a python AND ruby pro, i'm only the former. Couldn't hurt to be up on golang too these days. going nuts now... polyglot ops engineers.
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<jhass>
NET||abuse: aha. If you have any real question, just ask
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<Sou|cutter>
if it makes you feel any better, I use ruby a lot and find rake to be a sort of awkward dsl
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<NET||abuse>
Sou|cutter: cheers, yeh, i find ruby's plasticity hard, being able to override any symbol you like, is good for generating dsl's, but makes the language unpredictable.
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<Ox0dea>
Isn't Rake the "original" DSL?
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<Ox0dea>
NET||abuse: "Any symbol"?
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<NET||abuse>
Ox0dea: well maybe i'm still not informed enough to comment on it, but i thought just about anyting can be overridden in ruby,
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<Sou|cutter>
I think he means that classes are open for modification?
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<Sou|cutter>
*they (ugh)
<Ox0dea>
Methods and the like, sure, but you've gotta go way outta your way to modify actual Symbols.
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<Ox0dea>
Sou|cutter: In your defense, it's a decidedly masculine nick.
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<NET||abuse>
hah, yes,s male here
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<Ox0dea>
Attack helicopter here.
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<snockerton>
so I have a ` require 'active_support/all'` in my ruby script, and it has no issues loading the gem, but when I use pry and do a manual require, it says "cannot load such file"
<snockerton>
what gives?
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<apeiros>
snockerton: different gemfile?
<apeiros>
different ruby?
<apeiros>
different gemset?
<snockerton>
not that i know of
<snockerton>
running ruby script.rb and pry in the same context, same shell
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<jhass>
snockerton: ruby -v & pry -v ?
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<apeiros>
and after that, check the gem envs
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<dEPy>
Yo
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<blubjr>
hi depy
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<dEPy>
Is it ok to say here that we need a Ruby programmer?
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<dEPy>
Or do you have any recommendation to where to find Ruby programmers to hire?
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<apeiros>
dEPy: until it becomes a problem, recruiting is fine here.
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<DataKid>
what do you need dEPy?
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<dEPy>
Well I said it already I guess. More info privately or at matjaz@codeable.io - basically we need a Ruby/Rails programmer to help with development/refactoring and improving our backend/API.
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<dEPy>
We would prefer someone that is mainly Ruby over someone that mains Rails.
<centrx>
Is it fun?
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<dEPy>
We would like to drive our app development into the direction of DDD and hexagonal approach slowly as it is getting harder to maintain and develop trying to do it the rails way.
<dEPy>
centrx: well. I am the 1st employee in the company and after more than 3 years I'm still here. My previous record was 2 years. :)
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<centrx>
I only do octagonal XXX development
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<Ox0dea>
Kinky.
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<dEPy>
octagonal sounds awesome :P
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<dEPy>
No but in all seriousness no matter what you call it, getting core domain logic out of rails is a good idea imo.
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<apeiros>
dEPy: not sure whether I should be impressed. 8y where I'm now :)
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<dEPy>
apeiros: not sure what you mean. :)
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<apeiros>
relating to 3y as "long"
<dEPy>
well the company is 3 years so that's the upper limit :)
<dEPy>
and my whole career is less than 10y. Cut me some slack. :)
<apeiros>
hehe, ok
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<blubjr>
is there a root printing function that always gets used
<jhass>
blubjr: what's your issue?
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<apeiros>
you mean whether puts/printf/print etc. use a common method?
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<blubjr>
i want something like lisp's fresh-line, that prints a newline unless you're already at the start of a line. the only way i can see to do that would be if theres a base printing function, to advise that to watch the last thing printed
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<Ox0dea>
You could query the terminal.
<blubjr>
and hopefully stdout isnt a special case
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<jhass>
I'd suggest a wrapper around $stdout that tracks it and use that everywhere (maybe even reassign $stdout to it)
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<blubjr>
i mean i would want it to work regardless of where youre writing to
<Ox0dea>
blubjr: Sounds like you want to redefine IO#write.
<Ox0dea>
Rather, that's the immediately obvious "solution".
<toretore>
sounds like a bad idea overall to me
<Ox0dea>
But the man wants fresh lines, and he shall have them!
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<blubjr>
woman
<shevy>
you just can't solve blubjr's problem!
<blubjr>
thank you, ill look into it
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<Ox0dea>
blubjr: I'm trying to think of the cleanest way to have IO#write still do what it's supposed to do.
<Ox0dea>
It's the "base printing function", after all.
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<Ox0dea>
Why didn't you "correct" me when I called you pg's son?
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<blubjr>
i did
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<Ox0dea>
Shit, you did.
<Ox0dea>
My apologies.
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<Ox0dea>
I don't see how to do it in pure Ruby. :<
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<Synthead>
this helps a lot, thanks guys!
<apeiros>
Synthead: IMO the thing to do there is not use **params but host: nil, login: nil etc.
<apeiros>
?guys Synthead
<ruboto>
Synthead, Though inclusion was probably intended, not everyone relates to being "one of the guys". Maybe consider using "folks", "all", "y'all", or "everyone" instead?
<Synthead>
apeiros: agreed, will do
<apeiros>
thanks :)
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<Ox0dea>
Synthead: It's unclear to which of apeiros' advisements you were agreeing; could you clarify?
<shevy>
I am folk
<apeiros>
the shevy folk
<Ox0dea>
#ruby is a gang-free environment.
<Synthead>
Ox0dea: the params suggestion
<apeiros>
oh :(
<Ox0dea>
The {m,s}adness will never end.
<apeiros>
and there I hoped they'd say "both"
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<centrx>
'Maybe consider using "hey gang" or a gang sign like "\/_\/"'
<apeiros>
preferably from dr. horrible's sing-along
<apeiros>
oh, sign, not song. quite a misread…
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<slash_part>
Ox0dea: what about the dollars? they're not like the typical color gangs
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<Ox0dea>
slash_part: Are you expressing anarchist sentiments?
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<Ox0dea>
I'll grant you that, but I maintain that symmetry is a Good Thing, and that "it'll confuse somebody" is a poor reason not to do something.
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<Ox0dea>
For certain definitions of "confuse" and "somebody", of course. In short, %'' is not obfuscation.
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<yardenbar>
Hi all, what can cause ruby process to exit with code '-6'?
<hxegon>
but it does trigger rubocop warnings, which is kind of annoying
<yardenbar>
The process is running an eventmachine
<jhass>
it does, ' is no longer a visual indicator for the "interpolation" property that I have strongly associated with it in Ruby, having to check for % is actually removing semantic for me
<jhass>
yardenbar: what reports -6 to you?
<Ox0dea>
jhass: Is there some justification for %() besides its being "the done thing"?
<yardenbar>
jhass, The process is managed by CircusD, and there's a plugin that emits the process lifecycle events
<jhass>
Ox0dea: no, I just consider it the least conflict free. And actually "what most people use" is not a too bad reason too
<yardenbar>
This is where I see the -6 code
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<Ox0dea>
hxegon: Take your pick, but RuboCop will probably complain about almost all of them. :P
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<Ox0dea>
jhass: I just wish whoever decided %w() > %w[] had realized Ruby isn't actually Lisp.
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<jhass>
yardenbar: I can't find a special meaning to it adhoc, are you sure your application isn't exiting with it explicitly? Note "exit 250" might produce the same
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<yardenbar>
Found "smallbin double linked list corrupted" in logs
<imperator>
i dunno, i guess i just thought it would be nice to have a more elegant solution
<imperator>
not a huge deal
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<imperator>
but thank you all for your tips :)
<Derailed>
Hi all. I'm a newbie reading through a whole lot of rails code. I'd just like to confirm something about Ruby: What happens if you define the same class twice?
<adaedra>
That's a solution, but no, there's nothing built-in, imperator
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<Ox0dea>
Derailed: You "re-open" it.
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<adaedra>
Derailed: You don't, you re-open it.
<adaedra>
Dammit.
<Ox0dea>
<3
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<imperator>
adaedra, do you think it's worth a RFC?
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<Derailed>
:-) So "re-open" is a term I'm not familiar with, but I assume you mean I can add more methods to it, and those all end up in the original class?
<Ox0dea>
Derailed: Ruby classes are subject to modification at all times.
<imperator>
or are we getting into "may as well add type checking" territory?
<adaedra>
>> class Potato; def cook; end; end; po = Potato.new; class Potato; def shout; %(I'm a potato!) end; end; po.shout # Derailed
<Derailed>
Ox0dea, What happens if you redefine an already-defined *method* in this case?
<imperator>
How are you doing? Because I'm a potato.
<Ox0dea>
Derailed: It gets overwritten.
<adaedra>
imperator: i'm not familiar with Ruby politics.
<Derailed>
Ox0dea, Over-written, not necessarily the same as 'over-ridden'? I guess it works out the same.
<Ox0dea>
Derailed: Aye, same thing.
<Ox0dea>
As per what I imagine is your definition of those terms, anyway.
<adaedra>
Derailed: try all of that and see
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<Derailed>
Ox0dea, Thanks. Let me give you context: I was trying to work out how adding this gem was adding routes to the rails project I'm reading: https://github.com/AbleTech/easy_admin
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<Derailed>
the part that really confused me is that it seems like installing the gem is all you need to do, you don't even need to 'require' it!
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<Ox0dea>
Derailed: It's being autoloaded.
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<Ox0dea>
Rails magic best magic.
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<Derailed>
Ox0dea, ...and the autoloading is a 'Rails' thing, NOT a ruby thing, right?
<Ox0dea>
No, it's a Ruby thing, but Rails "augments" it.
<adaedra>
It's a Bundler things, technically
<Ox0dea>
You have to explicitly declare that you want some constant to trigger a load in straight Ruby, but Rails hooks #const_missing to do it automagically.
<adaedra>
Ah, this
<jhass>
adaedra: that'd be a broad definition of autoloading
<mfqr>
1/3
<Derailed>
Is rails auto-loading stuff based on the Gemfile?
<jhass>
no
<Ox0dea>
No, missing constants.
<adaedra>
The Gemfile part is Bundler, the missing constants part is Rails.
<adaedra>
(I thought they were referring to the "add the gem to Gemfile and it's done" part)
<Derailed>
Ox0dea, thanks for your help. Do you know where in docs I might get a concise explanation of that?
<nchambers>
ruboto is closed source right?
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<Ox0dea>
Derailed: Of #const_missing, or?
<Ox0dea>
nchambers: Yes, as is eval.in.
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<adaedra>
nchambers: yes.
<adaedra>
Ox...
<Derailed>
based on what you've told me, I understand how easy_admin is defining some classes to use, and then you 're-open' them in the rails app. But I'm still unclear on how 'easy_admin' is getting loaded into my rails project
<nchambers>
shame :L
<Ox0dea>
adaedra: I need to break a finger or something.
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<nchambers>
I wish I still had that email from the author... oh well
<Ox0dea>
Hm?
<nchambers>
didn't charlie some write it?
<Ox0dea>
Yes.
<nchambers>
yeah I emailed him a bit about it before
<Ox0dea>
Derailed: You're referring to `EasyAdmin` by name at some point, yeah?
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<adaedra>
Derailed: well, you added it to your Gemfile, right?
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<Derailed>
Ox0dea, no, but the classes with the same name are being defined in: class Admin::JobsController < Admin::BaseController
<Ox0dea>
Ah, then it's Bundler doing the loading.
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<Derailed>
adaedra, "easy_admin" is in the Gemfile, yes.
<adaedra>
So yes, bundler "Magic".
<adaedra>
In fact, the Bundler.require that lies in config/application.rb
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<adaedra>
(For rails at least.)
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<adaedra>
(Night time, see y'all)
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<jhass>
nchambers: what do you want to know about it?
<Ox0dea>
Au revoir, adaedra.
<nchambers>
jhass, just looking at how it does eval
<nchambers>
jhass, nice. I was thinking of doing a thing with lxc
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<jhass>
I think charliesome is running just a seccomp filter with a quite elaborated whitelist (looking at arguments too)
<jhass>
+ some resource limits
<Ox0dea>
nchambers: See also OpenBSD's tame(2) and FreeBSD's capsicum(4).
<Ox0dea>
Both pretty "get your hands dirty", as best I can tell.
<Ox0dea>
(I do realize that's probably not what you want.)
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<lawd>
hi i can usually do: 'apt-get install ruby-dev' on linux. What do you do for MAC
<nchambers>
<jhass> I think charliesome is running just a seccomp filter with a quite elaborated whitelist (looking at arguments too) ← ah ok
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<nchambers>
<Ox0dea> nchambers: See also OpenBSD's tame(2) and FreeBSD's capsicum(4). ← thanks thats actually quite helpful
<jhass>
lawd: OS X comes with Ruby
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<lawd>
hmm do you know how i can set the PATH
<apeiros>
or you use rvm. or brew. or one of the other ruby version managers.
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<lawd>
ruby-dev includes ruby doesn't it?
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<nchambers>
lawd, PATH=$PATH:/new/path
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<havenwood>
lawd: I don't think so.
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<lawd>
thanks!
<EvilDMP>
Help! I have managed to get my ruby into a muddle ("zsh: /usr/local/bin/jekyll: bad interpreter: /usr/local/opt/ruby/bin/ruby: no such file or directory"). I am on OS X, but I am not an experienced Rubyist and would greatly appreciate some advice on getting it reinstalled correctly
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<EvilDMP>
I use Homebrew
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<havenwood>
lawd: On OS X there is a default system Ruby (or two, depending on your version) or it's popular to grab a package manager like Homebrew, pkgsrc, MacPorts or Fink - each of which have Ruby packages.
<EvilDMP>
which ruby says: /usr/bin/ruby
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<havenwood>
lawd: Or you can always build Ruby yourself on OS X or use a tool like ruby-install or RVM to do it for you.
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<lawd>
ah i think i'll try rvm thanks!
<apeiros>
EvilDMP: sounds like you messed up your brew installed ruby. uninstall and install again?
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<EvilDMP>
apeiros: the ruby in /usr/bin/ruby is not a brewed version, I think it is the OS X default version
<EvilDMP>
how can I check that it works?
<apeiros>
EvilDMP: and that part sounds like you messed up your brew too
<apeiros>
EvilDMP: well, actually no
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<apeiros>
first one says your brew ruby does not exist
<jhass>
it has the option but it's still not a default
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<EvilDMP>
should I expect gem install jekyll to try to install it into /usr/bin?
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<EvilDMP>
(it does)
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<Radar>
Depends on how you installed your Ruby.
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<Radar>
Homebrew, supposedly?
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<havenwood>
jhass: aye, I look forward to a RubyGem --env-shebang default!
<Derailed>
Hi! So Ox0dea was explaining 're-opening' classes to me. I have a related question: What if you 're-open' a class but specify a different '< SuperClass'? what happens then?
<Ox0dea>
?try Derailed
<ruboto>
Derailed, Why don't you try it and see for yourself?
<Derailed>
Fair point :-)
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<Derailed>
I'm reading a large chunk of code and trying to work out why it's doing what it's doing. Trying to get through it quickly but a little experimentation seems necessary
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<EvilDMP>
Radar: botched! it was brewed, now I have removed that and am trying to get things working with the system ruby
<EvilDMP>
not as bad as that time I borrowed a friend's motorbike though
<havenwood>
chruby \o/
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<apeiros>
Derailed: since this is a special case: also try defining a class with a superclass, then reopen it without any superclass at all.
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<Derailed>
apeiros, thanks for the tip. So now I see that you get a 'superclass mismatch'
<Derailed>
apeiros, and now I have to work out why the code that I'm reading DOESN'T generate one of those :-)
<jhass>
maybe you confuse two classes with the same name in different namespaces as the same class?
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<Derailed>
jhass, I think I must be doing something like that.
<Derailed>
What I need is 12-16 hours to just sit down and cram the pickaxe book into my head :-) but that'll have to wait till the weekend
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* Derailed
is a Python developer who is learning Ruby by total immersion :-)
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<apeiros>
Derailed: the point is that with `class X < A; end; class X; end` you don't get a mismatch (despite not having specified the same superclass)
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<Derailed>
apeiros, I assume that's just to make adding methods/augmentic classes easier? Like, the second definition does *not* change the superclass, right?
<apeiros>
correct
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<apeiros>
but if you reverse the order, it'll fail
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<jscheel>
Hi all, I’m having trouble with Resolv. On my local machine `Resolv::DNS.open { |dns| dns.getresources 'gmail.com.', Resolv::DNS::Resource::IN::MX }` returns a mailserver record. However, in my vagrant instance, the same line returns nothing.
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<jscheel>
running `nslookup -q=mx gmail.com` in the instance returns records
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<jscheel>
oh, wait, it returns bad info in the instance
<jscheel>
this is a vagrant issue I think
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<apeiros>
adaedra: is that a regression? I thought derpy searches core/stdlib for plain methods?
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<Authenticator>
I'm building a gem, using bundler. Is there any way I can get it to install, from a .gem on my internal server, but using the dependencies in vendor/cache? I can get *bundler* to do this, but that's another step for the user...
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<Synthead>
apeiros: hm, that example looks really hacky
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<jhass>
rubygems doesn't read vendor/cache and if it exists you have bundler already anway, no?
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<jhass>
*anyway
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<Authenticator>
jhass: I'm including the deps in the gem, so no the user may not have Bundler at that point.
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<jhass>
so you imagine rubygems to unpack your gem to some temporary location to check whether some dependencies are hidden into it and then unpacking it again to install it or something?
<jhass>
No, it doesn't do anything like that
<drbrain>
maybe if you `gem install -g`
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<Authenticator>
jhass: I imagine it does not - but yeah that's what I want. Otherwise, what good are vendored dependencies?
<jhass>
rubygems has no concept of vendored dependencies
<jhass>
that's a bundler concept
<Synthead>
apeiros: can I define a method with params?
<apeiros>
yes
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<Synthead>
apeiros: oooh, I see, you pass the variables in the block
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<Synthead>
apeiros: there we go, I got it figured out. all nice and dry. thanks a lot!
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<apeiros>
all I did was point you at the right page in the manual ;-) but yw
<Authenticator>
jhass: Yeah, I mean that's what I'm discovering... I can see that it's that way because gems came first. Is it not a good idea though? A pass-through to bundler in modern versions of gem, or something...?
<jhass>
It probably isn't
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<jhass>
I don't see the issue anyways
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<drbrain>
Authenticator: RubyGems can install from a Gemfile with `gem install -g`, so it might work that way
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<jhass>
they gotta fetch you gem from somewhere, why not let them fetch the dependencies there or whereever too
<drbrain>
there may be bugs, though
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<Authenticator>
I think I could fake what I want if I separated the Gemfile. Tell gem that the gem relied only on bundler, then run bundler install --local...
<Authenticator>
drbrain: Looking.
<jhass>
honestly, I feel like you're about to create a huge mess
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<jhass>
and that while I'm not even convinced there's really an issue you need to solve
<Ruby_Rocks_007>
hi
<Ruby_Rocks_007>
ruby newbie asking for help on operator precedency:
<Authenticator>
jhass: I imagine you'd be tough to convince.
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<drbrain>
if you have a directory full of gems you want to install, you can always `gem install --force --local *.gem`
<drbrain>
which may be equivalent?
<drbrain>
I haven't read much scrollback
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<Ruby_Rocks_007>
does the ‘&&’ operation does have higher priority than ‘if’ the statement modifers?
<jhass>
drbrain: from what I've gathered they want to package a bunch of .gem files into a .gem file and have the outer .gem depend on the gems packaged in the inner .gem's
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<Ruby_Rocks_007>
then some one can help elaborate why this doesn’t print...
<drbrain>
oh, yeah, RubyGems doesn't support that
<Ruby_Rocks_007>
a=123;
<Ruby_Rocks_007>
sorryl
<Ruby_Rocks_007>
sorry;
<Ruby_Rocks_007>
a=nil;
<jhass>
?gist Ruby_Rocks_007
<ruboto>
Ruby_Rocks_007, https://gist.github.com - Multiple files, syntax highlighting, even automatically with matching filenames, can be edited
<jhass>
throw up some code explaining what you mean there please
<Ruby_Rocks_007>
(a=123) && print(‘hello ruby’) if a
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<Authenticator>
drbrain: jhass: Mostly. Yeah. I know it doesn't. I'm trying to figure out if I should just make it work via some simple work-around or if there's a better way to achieve a simple local install.
<Ruby_Rocks_007>
that is it.
<jhass>
Authenticator: there's most certainly a better way
<Ruby_Rocks_007>
if ‘&&’ does have high pri, then it should print
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<jhass>
Authenticator: specifics depend on how you distribute your .gem and where the dependencies come from initially
<Ruby_Rocks_007>
but it didn’t — and so ‘if’ statement modifier have the highest pri?
<Authenticator>
jhass: Do you have any idea what it would be for a seamless (non-ruby users trying to install script) UX, with a no-net-connection install
<jhass>
Ruby_Rocks_007: you can see it that way, yes
<drbrain>
Ruby_Rocks_007: modifier `if` has higher priority than `&&`
<Ruby_Rocks_007>
O’Reilly book said that ‘if’ statment modifers have lowest priority.
<Ruby_Rocks_007>
so I got completely lost here — from C/C++/Java background
<Authenticator>
jhass: Thanks. Looking.
<drbrain>
Ruby_Rocks_007: `if condition then … end` and `… if condition` are parsed differently
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<drbrain>
so they can have different priorities
<Ruby_Rocks_007>
@drbrian, so how the statement parsed and carried out?
<Ruby_Rocks_007>
(a=123) && print(‘hello ruby’) if a
<Ruby_Rocks_007>
when variable ‘a’ is value nil.
<drbrain>
Ruby sees it as ((a=123) && print(‘hello ruby’)) if a
<jhass>
Ruby_Rocks_007: you observed it correctly already
<Ruby_Rocks_007>
yes, it didn’t print
<drbrain>
but when it parses, it encounters the `a=` first, so `a` becomes a local variable instead of a method call
<drbrain>
and local variables default to `nil`i
<Ruby_Rocks_007>
the left side of ‘if’ should run first — as it is have higher priority,
<drbrain>
this is the tricky part of modifier if
<Ruby_Rocks_007>
and then becomes statement (nil) if a
<drbrain>
`a=` is parsed first, but executed last
<drbrain>
(if at all)
<Ruby_Rocks_007>
the left side:
<Ruby_Rocks_007>
((a=123) && print(‘hello ruby’))
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<Ruby_Rocks_007>
‘should’ be executed first
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<Ruby_Rocks_007>
before turns into statement:
<Ruby_Rocks_007>
nil if a
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<Ruby_Rocks_007>
as ‘if’ has lowest priority
<drbrain>
but modifier-if doesn't work that way
<Ruby_Rocks_007>
just like: 1 + 2*3
<Ruby_Rocks_007>
2*3 carried out first, and turns into: 1+6
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<drbrain>
you can't run the body of an if when the condition is false
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<drbrain>
comparing `if` to operators isn't comparing like things
<Ruby_Rocks_007>
@drbrain, then the book is at some-what-level inaccurate (for newbies),
<jhass>
Ruby_Rocks_007: either you misinterpreted something in your book or it's misleading or simply wrong. I don't have it so I can't double check, but you need to get over that interpretation, it's wrong
<Ruby_Rocks_007>
the modifiers have —highest— priority.
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<drbrain>
and modifier-if is extra tricky because ruby allows reciever-less methods and local variables to share the same namespace
g3funk is now known as braidn
<drbrain>
I would say lowest
<Ruby_Rocks_007>
The book ‘The Ruby Programming Language’ by O’Reilly. Page #103
<drbrain>
because && binds the assignment and print expressions together
<drbrain>
precedence is like stickiness
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<drbrain>
high precedence means more sticky, so && sticks (a=123) and print('hello ruby') together
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<Ruby_Rocks_007>
@drbrain, so ‘&&’ operator binds first,
<drbrain>
and more tightly than it can stick print('hello ruby') and if together
<Ruby_Rocks_007>
but runs second (to the modifer-if)
<drbrain>
yes
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<Ruby_Rocks_007>
so, what is the difference between binding vs. running, as far as sequence is concerned?
<Ruby_Rocks_007>
for me, it looks like quite the same?
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<drbrain>
binding and running should be the same
<drbrain>
but parsing and running can have strange results
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<drbrain>
or, unintuitive if you're new to ruby's syntax quirks
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<Ruby_Rocks_007>
that’s why a newbie is here. :)
<Ruby_Rocks_007>
parsing/binding says that ‘&&’ operator have the assignment and print,
<Ruby_Rocks_007>
but running says that modifier-if will run first, is that right?
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<drbrain>
yes
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<drbrain>
because low-precedence means `if` can grab less on the left and right
<drbrain>
but here `if` grabs all of `((a=123) && print('hello ruby'))`
<drbrain>
because the `&&` makes the expression left of the `if` all one group
<Ruby_Rocks_007>
so, the precedence means the capability to ‘grab’ nearby oprands,
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<drbrain>
roughly, yes
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<Ruby_Rocks_007>
is there a table shows the running capability for ruby, just like the table for precedence?
<drbrain>
the precedence table determines how things run as expressions
<Ruby_Rocks_007>
say, modifier-if is of higher priority than operator ‘&&’ when running sequence is concerned
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<drbrain>
it becomes confusing (in general, for humans) if the parse-time precedence table and runtime precedence tables are different
<drbrain>
I haven't heard of a language designer specifying these separately
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<Ruby_Rocks_007>
@drbrain, your mentioned the right point
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<Sam0163141155>
If I was to declare a local variable within a class, outside of all methods, would it behave exactly the same as an instance variable?
<Ruby_Rocks_007>
exactly I got confused here
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<jhass>
Sam0163141155: no
<drbrain>
Sam0163141155: it would only be local to that one time you opened the class
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<Sam0163141155>
Ah, of course! Brilliant, thanks!
<Ruby_Rocks_007>
case #1, 1+3*2
<drbrain>
>> class A; v = 1; end; class A; p v; end
<ruboto>
drbrain # => undefined local variable or method `v' for A:Class (NameError) ...check link for more (https://eval.in/478654)
<Ruby_Rocks_007>
the 3*2 is parsed first and runs first, and then turns into: 1+6
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<jhass>
Ruby_Rocks_007: do you have a rough idea of what an AST is?
<drbrain>
Ruby_Rocks_007: I would say "1 is parsed, then + is parsed, then 3 is parsed, then * is parsed, then 2 is parsed, then an expression is assembled that has the right order-of-operation based on the precedence table"
<Ruby_Rocks_007>
case #2 above is counter-intutive, the ‘&&’ operator is parsed and binded first, but runs second.
<drbrain>
but this is entering the territory of how parsing algorithms work
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<Ruby_Rocks_007>
@jhass, I think I returned AST to CS teacher,
<drbrain>
if you want to know how parsers do their parsing
<Ruby_Rocks_007>
I am a nice student. :)
<jhass>
to me it helps to try to roughly come up with an AST for stuff, visually that is
<jhass>
but we can also ask Ruby for it actually
<drbrain>
for "3*2+1" I would say "3 then * then 2 are parsed, then a sub-expression is assembled, then + and 1 are parsed and the full expression is assembled
<Ruby_Rocks_007>
got it, @drbrain. I’ll check it out shortly.
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