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<charliesome>
joonty: no it's closed source
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<flae>
hey guys. anybody got time for a ruby beginner for some ubuntu-specific questions?
<onewheelskyward>
I can try.
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* Nilium
pats onewheelskyward
<Nilium>
It's okay, trying wasn't good enough, apparently.
<onewheelskyward>
nah flae pm'd instead of asking in the channel. :)
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<goleldar>
how do i have a class execute a method when initializing?
<onewheelskyward>
put it in the constructor?
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<Lewix>
goleldar: Object.new.methods
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<pontiki_>
that executes after the new, i.e. after initialize is done
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<pontiki_>
just put whatever code you want to run during initialization in the initialize method for the class
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<kvda>
is there a good static site generator with GUI editing support?
<kvda>
or a minimalist wiki?
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<popl>
kvda: crossposter
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<kvda>
popl, haha, are you referring to me asking the same question in #python?
<kvda>
are you insecure or something?
<popl>
huh?
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<pontiki_>
kvda: do you care what language it's implemented in?
<r0bglees0n>
kvda: no youre just paranoid
<popl>
what would that have to do with anything?
<kvda>
ah right, pardon me
<popl>
nope
<popl>
well ok
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<sevenseacat>
lol
<kvda>
i do apologise
<popl>
only because other people said something
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<kvda>
you're saying there's a 'crossposter' ruby wiki/ssg?
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<pontiki_>
something like that wouldn't be all that hard to whip up, would it?
<pontiki_>
say using markdown as the page language
<kvda>
pontiki_, i don't care what's it written in no
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<pontiki_>
there's likely something that can plug in to jekyll
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<r0bglees0n>
what do you mean by GUI
<kvda>
pontiki_ ah that sounds good. it'll be easier to sell. at the moment the management is talking about drupal
<pontiki_>
kvda, was thinking of a few php-based wiki things
<pontiki_>
but theyy aren't actually static
<r0bglees0n>
because static site generators generally are edited in a text file and compiled when you're finished.
<pontiki_>
run!!
<kvda>
we don't use php anywhere, almost everything else we do
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<kvda>
pontiki_ yes exactly!
<r0bglees0n>
you could easily stick a web editor on a web page that talked to a small ruby web service that'd update the jekyll files on disk, recompile, and maybe redeploy
<kvda>
so yes i could make my own, but it won't look so good when they start calculating time/budget
<kvda>
r0bglees0n, yes but i have to convince other engineers of this too.
<kvda>
it's not just me, in which case yes i you're suggestion sounds good.
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<r0bglees0n>
the page would request a file, send it to the browser, edit, POST/PUT back(it doesnt really matter for this), and do the deploy
<kvda>
*your
<r0bglees0n>
it would be a sweet setup
<kvda>
r0bglees0n, i agree
<r0bglees0n>
but i guess.. i dont know, for a ruby programmer that is cool
<r0bglees0n>
i would also recommend nanoc over jekyll
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<r0bglees0n>
jekyll is more like for blogs, nanoc is general purpose
<kvda>
r0bglees0n, if this thing exists as software i'd jump on it, but selling this custom solution will not fare well with other people on the team
<r0bglees0n>
that should be "content": to parse as JSON.
<kvda>
you don't need to psuedo-code it for me, but thanks.
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<r0bglees0n>
it doesnt even need to know about nanoc
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<r0bglees0n>
ideally it wouldn't at all
<r0bglees0n>
so i wouldnt write it as a nanoc module
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<r0bglees0n>
i might write a nanoc compiler as a module to the service or something, if that was needed
<kvda>
and he's off...
<popl>
kvda: what side of the bed do you sleep on?
<popl>
kvda: let's spoon
<kvda>
that's the joke?
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<kvda>
pop your 2nd collar higher bro
<pontiki_>
kvda: how would your coworkers/boss feel if you did this on your own time?
<kvda>
pontiki_ I'd have to justify it. For this project I don't see many good justification that I could present.
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<r0bglees0n>
um
<r0bglees0n>
good technology?
<r0bglees0n>
does that matter anymore
<pontiki_>
justify how you spend your time?
<popl>
kvda: spooning is serious business
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<r0bglees0n>
i think theyd be impressed, if anything
<kvda>
popl, your jokes are not funny
<popl>
who is making jokes?
<kvda>
r0bglees0n, you might be a little unexperienced here?
<r0bglees0n>
why?
<pontiki_>
where is "here"?
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<kvda>
managers are not impressed by technology at all
<r0bglees0n>
it really depends how the company is built
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<kvda>
in a startup this might work
<r0bglees0n>
at some companies managers are developers
<kvda>
r0bglees0n, but they still have balance 'managing' and 'developing', so they'll push for good tech of course, but not a complete in house solution to every problem.
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<pontiki_>
how strong is the requirement for "static"?
<kvda>
pontiki_ here in my case is a large tech corporation
<pontiki_>
i've worked (many years) in one large tech corp, and managers varied all over the place
<r0bglees0n>
kvda: its funny, because the large tech corporation will probably roll out a PHP solution
<pontiki_>
but in your particular chain, obviously not at all
<kvda>
pontiki_ not very, i like the model because it doesn't require a db
<r0bglees0n>
it seems weird/wrong :/
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<kvda>
r0bglees0n, not true, they role out many different things, depending on the company
<pontiki_>
kvda: how about a wiki that uses flat files? yes, written in php! \o/
<popl>
kvda: three points of contact
<kvda>
facebook is the only one that does PHP seriously as far as im aware
<popl>
kvda: how about it?
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<r0bglees0n>
kvda: yeah, there's not complete truth to what i said, but i think it probably happens.
<pontiki_>
how about one written mostly in backbone.js that also uses flat files, in this case stored on Dropbox?
<r0bglees0n>
you'd expect a tech company with any pride to try not use something that's a pile of crap, but if you're just outsourcing a problem i guess it doesnt matter
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<kvda>
r0bglees0n, again this is just not how things work
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<kvda>
corporations are multi-dimensional, they don't have one view on anything
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<r0bglees0n>
yeah, i dont know
<kvda>
apple 'appeared' to have one for a while, that's completely due to jobs though
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<kvda>
there's a difference between 10 and 10,000 people that's not hard to discern :)
<r0bglees0n>
i guess i'm thinking of companies who solve problems with stuff like magneto, there's no appreciation of the underlying technology but just that it solves the problem
<r0bglees0n>
usually small companies
<kvda>
r0bglees0n, with that you're right, but they're running their business on very tight margin, desperately trying to make a profit
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<kvda>
they can't allow people to implement custom solutions because they're flop, they need to sell whatever works… quickly
<kvda>
*they will flop
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<r0bglees0n>
yeah, true
<r0bglees0n>
its kind of a con though
<r0bglees0n>
you're selling crap
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<kvda>
you'd wouldn't be interested in how the finance/banking world works then…
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<popl>
why?
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<kvda>
thanks all, bye
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<popl>
nobody likes spooning with strangers from the internet. :(
<pontiki_>
nobody likes spooning with strangers from the internet. ***\o/***
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<popl>
pontiki_: what's that emoticon mean?
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<pontiki_>
cheering
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<popl>
pontiki_: I guess that's how you get pink eye.
<pontiki_>
that or sharing eye brushes
<popl>
who brushes their eyes?
<popl>
weirdo
<pontiki_>
>.>
<pontiki_>
ta :)
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<louism2wash>
How does Ruby keep a reference to the various modules and classes defined in an application? When you say 'include SomeModule' is there some sort of directory for where each module/class is kept in memory? Thanks.
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<pontiki_>
i think you want to start reading the ruby source code, louism2wash
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<louism2wash>
pontiki_: I'm sure that would help
<pontiki_>
someone here *might* know that
<louism2wash>
pontiki_: Any chance you can give high-level summary?
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<pontiki_>
but jeepers that is way internals
<pontiki_>
i have not a clue
<pontiki_>
what do you need such information for?
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<louism2wash>
pontiki_: I'm just trying understand what is going on with require/include statements. It seems like require just loads the file at runtime and then the various classes and modules get included in the application stack somehow.
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<pontiki_>
ah
<pontiki_>
require loads the code
<pontiki_>
include maps the module's methods and such into the class it's included in
<pontiki_>
what more do you need to know than that?
<pontiki_>
if you're coming from php, include does something completely different than require
<pontiki_>
as opposed to in php they're basically the same thing, modulo guarding re-includes
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<sevenseacat>
only diff in php is that require will give you a fatal error if the file isnt found
<pontiki_>
if that is where you're coming from, break that association
<sevenseacat>
include will just shrug and move on
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<pontiki_>
that's what i meant about the guarding
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<pontiki_>
in ruby, require has nothing to do with include
<pontiki_>
however, you may have to require a module's source code to include it, they are completely separate things
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<louism2wash>
pontiki_: thanks for the clarification. I'm just trying to get a little deeper with Ruby. Trying to understand the internals a bit more
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<rfizzle>
Anyone know how to fix the issue with passenger and rufus. Passenger kills rufus scheduled tasks in my sinatra application.
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<rfizzle>
Running nginx
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<thecodethinker>
What is the '@' symbol before variables in a class? What does it do?
<popl>
thecodethinker: look up 'instance variable'
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<thecodethinker>
popl: Is there any reason to use them rather than normal vars... other than memory things
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<sevenseacat>
many
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<popl>
thecodethinker: did you look them up?
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<popl>
s/them/it/
<thecodethinker>
Should I always use them rather than normal vars in a class?
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<sevenseacat>
take that as a no
<popl>
oh well
<thecodethinker>
popl: I did.... I don't really understand though they are created when they are defined
<thecodethinker>
I did -_-
<popl>
try reading it until you understand it
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<sam113101>
use them whenever you want your object to change its own state
<popl>
because that's how you learn
<popl>
or at least one way you learn
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<sam113101>
read a book
<thecodethinker>
-_- I am reading the book of ruby... came across it.. I don't really understand the use of them. What do they do that normal vars don't?
<sevenseacat>
thecodethinker: persist outside a method.
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<thecodethinker>
sevenseacat: why not just declare a var before defining the method in the class?
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<sevenseacat>
because you cant just declare vars in classexsd
<sevenseacat>
classes
<thecodethinker>
oh
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<thecodethinker>
okay... that makes sense then
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<sam113101>
wouldn't it create variables on the class object?
<sam113101>
nah
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<tehTinMan>
So I heard this ruby was a thing...
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<sevenseacat>
tis indeed a thing.
<r0bglees0n>
not really
<r0bglees0n>
its virtual
<tehTinMan>
a virtual thing?
<r0bglees0n>
denysonique: B::Bar.first_name
<r0bglees0n>
constant lookup is finding A::Bar
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<r0bglees0n>
you need to fully qualify it
<tehTinMan>
anyone here ever try lolcode?
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<sevenseacat>
haha lolcode
<tehTinMan>
HAI
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<sevenseacat>
KTHXBYE
<DocEternal>
Hi, I'm trying to work out a database query I have, and can't get it working. Can anyone point out a good place I can ask questions about my rails code?
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<sevenseacat>
in #rubyonrails ? :)
<r0bglees0n>
#rubyonrails
<tehTinMan>
best language ever
<DocEternal>
thanks
<tehTinMan>
other than ruby ofcourse
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<tehTinMan>
I HAZ A KITTEH ITS 12
<r0bglees0n>
tehTinMan: i hope i dont have to /ignore you
<tehTinMan>
r0bglees0n: I have a point to this.... I'm making a lolcode interpreter in ruby :D
<DocEternal>
Ok, well I'll try here first. xD
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<r0bglees0n>
tehTinMan: ah nice
<r0bglees0n>
how is it?
<r0bglees0n>
DocEternal: ok go ahead ask
<tehTinMan>
r0bglees0n: just started it today. Working on the internals. No parser yet :(
<r0bglees0n>
if someone knows im sure they'll answer
<DocEternal>
I am trying to query a database and get return entries that match a set of parameters. The point is to get the timestamp of each and compare it to the one before it to get the duration between them.
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<DocEternal>
I can't seem to get the syntax right on it.
<r0bglees0n>
distance between time: DateTime#-
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<DocEternal>
I know the distance calc. The problem is comparing the entry to the one before it.
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<r0bglees0n>
but it has a lot of great tooling and is very hackable
<DocEternal>
Actually, one more question. The comparison actually needs to be made from one entry to the previous entry (so the first point in the db won't have a duration value). How would that change that?
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<r0bglees0n>
tehTinMan: never really benchmarked rubinius's perf. on computation like that
<tehTinMan>
hm... alright then... just wondering
<r0bglees0n>
DocEternal: don't understand your question, the entires should be ordered by time?
<r0bglees0n>
entries*
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<DocEternal>
the entries are ordered by time, but the duration between entry 1 and entry 2 would be the value for entry 2's duration, between 2 & 3 entry 3's duration, etc.
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<DocEternal>
If that makes sense
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<bnagy>
you can use each_cons(2) for that kind of stuff
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<goleldar>
is there a way to initialize a string if it has not been already and then append to it if it has in one line?
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<goleldar>
or is it common to just initialize a string first and then append to it in an each block
<sevenseacat>
what are you actually trying to do
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<DocEternal>
Hey, I'm trying to get some code working, and any time I try to run it I am getting an error that says "Unitialized constant {mycode} (NameError)". Any idea what I can do here?
<pontiki_>
although that's not as definitive as the first
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<seriously_random>
pontiki_, I am actually sure myself. I've got module Enumerable that has def function which needs to respond to has, range, array and iterator. All work except iterator. (Hope that is understandable)
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<seriously_random>
pontiki_, *not sure, lol
<seriously_random>
pontiki_, needs to respond to hash*
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<Nilium>
wat
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<canton7>
"function which needs to respond to hash, range, ... ". come again? Do you mean the function has to take those as its argument\?
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<Nilium>
I feel like there might be a language barrier involved in this.
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<pontiki_>
if they're doing a mixin, i can see it
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<canton7>
Do you have to create a new method which can be called on hashes, ranges, etc...? e.g. myhash.mynewmethod
<canton7>
s/have/want
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<seriously_random>
never mind, is there .is_not?(Array) like there is .is_a(Array)?
<canton7>
!thing.is_a?(Array)
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<r0bglees0n>
why would you use map if you didn't need to?
<e-dard>
r0bglees0n: well that's exactly my point
<e-dard>
I wanted to check
<r0bglees0n>
well, just use each if you're not doing anything with the return value
<e-dard>
(someone has changed my each to a map in a code-review)
<jlebrech>
i think there's a problem with my rspec setup. because stuff that should work doesn't
<r0bglees0n>
e-dard: really? and disregarded the return value?
<r0bglees0n>
are you sure it's not map!?
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<r0bglees0n>
jlebrech: can you define doesn't work?
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<r0bglees0n>
oh
<r0bglees0n>
youre not in an it() or specify()
<jlebrech>
r0bglees0n, doesn't test. all i want is a failure
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<r0bglees0n>
youre not inside a test
<r0bglees0n>
youre in a describe block
<r0bglees0n>
wrap it in it/specify do
<e-dard>
r0bglees0n: they didn't disregard the return. I do foo.each do /// end; foo.join(", "). They change to foo.map do /// end.join(", ")
<jlebrech>
r0bglees0n, ok
<r0bglees0n>
e-dard: those two pieces of code dont do the same thing
<e-dard>
I don't like chaining things on to end either. Seems weird
<r0bglees0n>
so, the behavior has changed
<r0bglees0n>
someone is wrong
<e-dard>
r0bglees0n: well I'm right because I wrote the damn thing in the first place.
<sevenseacat>
of course you are.
<e-dard>
but I suppose my test coverage could be short if they have changed the behaviout
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<e-dard>
r0bglees0n: based on that code only, why do you think the behaviour is different? I don't see it
<r0bglees0n>
i dont know if its changed or not, it depends on the content of the map block, but if the map block returns anything other than the contents of self(the array), the behavior is no longer the same.
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<jlebrech>
r0bglees0n, ok it kinda fixed it. now including the module gives me: can't convert Module into String
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<jlebrech>
r0bglees0n, wait
<jlebrech>
:P
<jlebrech>
r0bglees0n, thanks for the help
<r0bglees0n>
ok youre welcome
<e-dard>
r0bglees0n: ah I see. Basically the contents of the map block manipulates the contents of foo, in the same way the contents of the each block does
<r0bglees0n>
e-dard: and if the block does return the contents of self, using map doesn't make much sense.
<r0bglees0n>
you should never manipulate an array you're iterating over
<r0bglees0n>
how do you manipulate it
<e-dard>
I don't manipulate the array. It's the contents of the array
<r0bglees0n>
okay
<r0bglees0n>
and what does map return
<r0bglees0n>
do you mutate the contents instead?
<e-dard>
The array it's acting on
<r0bglees0n>
obviously it returns an array, but with what elements?
<e-dard>
r0bglees0n: as I understand it, map will be copying all the elements in foo, no?
<r0bglees0n>
no, not neccesarily
<e-dard>
r0bglees0n: one moment I will do an example
<denysonique>
r0bglees0n: I am writing a mini web scraping framework. Like 34 needs to be 'dynamic' as there will be many ExampleCom type of modules e.g. GoogleCom etc which include a Page class inherited from Scraper::Page
<Spooner>
seriously_random, Because you are not changing the object @list itself. You are reading it and altering it (you actually just want attr_reader).
<Spooner>
Sorry, I mean you are not changing the value of @list itself. You are modifying the object that is stored in @list.
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<zzz>
Hi, i' ve a string ending with identical characters, like "Hellooooooo". I' d like to remove the last identical characters from it. I could use chomp in a for cycle, but is there any better why? Maybe chomp has a parameter to remove all or something similar?
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<claymore>
why does "foo".is_a?(String) and false return true?
<Catbuntu>
If in "a.rb" there's "require 'b.rb'" and in b.rb there's "require 'c.rb'", will the things of c.rb be accessible in a.rb?
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<hanmac>
Catbuntu: yes
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<Catbuntu>
hanmac, thanks :)
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<Catbuntu>
Why can't I do something like: class Blah; @var = "String"; end and ten do Blah.var?
<Catbuntu>
Is there any way to create variables already defined inside a class and then accessing them outside
<Catbuntu>
?
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<hanmac>
Catbuntu because the variables are hidden from the outside, you need methods to access them
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<Catbuntu>
And is it possible to avoid that some way?
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<Catbuntu>
Like making the class Balah inherit from another class with something defined to make variables accessible
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<Catbuntu>
Like Rails, you can set "@var = 'blah'" and then just do @var from a view
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<hanmac>
CatBuntu the current problem is that you does not define @var at an Blah instance but on Blah itself (the class)
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<Catbuntu>
Yep
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<Leonin>
I am uploding image in form and i put link downloadimage it in view every time,suppose i no need to upload at some point so in the view it show an error when i click downloadimage link
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<Leonin>
I am uploding image in form and i put link downloadimage it in view every time,suppose i no need to upload at some point so in the view it show an error when i click downloadimage link
<Leonin>
hi every on e
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<banister`sleepy>
Leonin: #rubyonrails
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<_droid>
cool thx
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<Skaflem>
whois mauBot
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<_droid>
and another question: I'm doing the tutorials for Rails for zombies and currently doing the model part where they are using "ActiveRecords::Base". As I remember from other programming languages that need to access databases you need a username and password in order to authenticate with mysql for instance.But in the clip, for the reason of simplicity, doesn't mention a username and password. So where is it actually where you authenticate with ruby to a databa
<ghr>
Anyone know good examples of libraries that map to the filesystem? Here's a basic use case of what I'm trying to do http://pastie.org/8174448
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<rickruby>
how can I do sudoku_rows[row_index][cell_index] = possible_cell_values[row_index][cell_index]
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<andrew565>
Ruby's built-in Dir and File objects (and their I/O superclass) are pretty decent.
<rickruby>
so that instead of getting an array returned
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<rickruby>
I get the value of that array (which is an integer)
<andrew565>
RIO used to be pretty good too, ghr.
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<ghr>
andrew565 yeah, I use File/Dir under the hood (to actually save/open the files) but I'm more interested in how one instantiates objects with the correct data
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<rickruby>
nevermind, figured it out! :) sudoku_rows[row_index][cell_index] = possible_cell_values[row_index][cell_index].to_s.to_i
<nikeita>
fryguy what you mean "forget how try returns things"
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<codezombie>
when using Net::HTTP.post_form to make multiple requests to the same URL only the first request is executed. I assume this is caused by caching. Is there a way to disable this behavior? I didn't see any reference to this in the ruby docs.
<fryguy>
nikeita: nothing
<fryguy>
codezombie: you assume wrong, show code
<nikeita>
i'm thinking that self with bang operator is superflous, i'm right?
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<codezombie>
fryguy: one line Net::HTTP.post_form(URI.parse(@url), @credentials)
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<realDAB>
nikeita: the bang isn't an operator -- it's part of a method name
<codezombie>
if it's not caching, I can investigate further, I just assumed caching. Thanks.
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<nikeita>
yep, you are right
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<r0bglees0n>
nikeita: you don't need to use self unless you have a local variable with the same name. you're doing a read, so it's not the same as foo = "bar" / self.foo = "bar".
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<nikeita>
so if i understand i do not need to use self because i'm not assigning but work on the object itself with capitalize! method
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<keepguessing>
Hi I keep installing gems with the command gem install x, Is there a way to install multiple gems with a gem install
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<bnagy>
gem install x y z
<r0bglees0n>
nikeita: yes
<keepguessing>
bnargy how about form a file?
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<keepguessing>
bnagy: ^^^^^^^^^^^^^^^^^^^
<bnagy>
like.. what, macarena?
<keepguessing>
i do not know macarena
<bnagy>
oh, no more like a conga line I guess
<keepguessing>
like say pip install -r req.file
<bnagy>
da da dah dah dah dah ...
<bnagy>
DAH!
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<keepguessing>
bnagy: ?
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<bnagy>
keepguessing: I guess you might be asking about dependencies? You can do that in your gemspec or with bundler, if you like that kind of thing
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<keepguessing>
bnagy: say if I wish to install x number of files form a list of gems which are stored in a file how do I do that?
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<zachrab_>
is there there a way to render a no method error to false?
<keepguessing>
bnagy: gemspec is a gemlist file?
<zachrab_>
i have a condition which is usual met with one class instance but sometimes may be another class in which case renders a no method error
<r0bglees0n>
zachrab_: no, fix the NoMethodError.
<r0bglees0n>
dont hide bugs like that
<r0bglees0n>
terrible idea
<zachrab_>
r0bglees0n: i am working with ruby gems
<zachrab_>
i dont want to mess with a lot of code
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<r0bglees0n>
if you're trying to commit to rubygems you should probably take the long way and the good approach because they just won't accept it otherwise.
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<bnagy>
a = some_operation rescue false
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<r0bglees0n>
please dont do that
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<r0bglees0n>
thats just not a NoMethodError
<r0bglees0n>
thats anything
<r0bglees0n>
and rubygems wont accept it
<bnagy>
.. wait.. you're trying to commit to rubygems??
<bnagy>
hahaha
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<hanmac>
zachrab_ it "raises" an exception … if it trys to "render" an error then something is very wrong …
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<hanmac>
also look at #method_missing … but you need to be careful with this
<havenwood>
jonjo: Open the file called 'Gemfile' and change your source to 'https://rubygems.org'.
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<BlakeRG>
I'm using the Mail gem - when i run a Mail.deliver block how to do know the email delivery was a success? it's wrapped in a begin / rescue block so i know if there's an exception thrown just not if the delivery was a success.
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<havenwood>
BlakeRG: When you create your own errors, inherit from StandardError instead of Exception as well.
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<Spooner>
It is usual to just put the code you'd put in "else" after the line you think will fail. Actually, I think else makes perfect sense, to ensure that only "dangerous" code goes in the main block.
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<bnagy>
no.
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<bnagy>
sorry, no, to the second half of the sentence :P
<BlakeRG>
bnagy: and waxjar can you link me to a code snippet that shows how to properly handle the situation where i'd want to check that there was not an exception thrown without using the else?
<bnagy>
begin stuff; more stuff; rescue; # stuff didn't stuff; end
<waxjar>
BlakeRG: just put the rescue clause at the end
<waxjar>
if an exception is raised, it won't execute the lines after it
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<waxjar>
you could put those lines in an else block, if you like
<waxjar>
bnagy: what's so bad about it?
<bnagy>
it's awful
<waxjar>
you're not very convincing :P
<bnagy>
it's never used
<BlakeRG>
waxjar: would you mind posting up a quick example? sorry, i'm coming from a long background of bad curly brace languages...
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<bnagy>
nobody reading it will be expecting to see the control flow broken up like that
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<havenwood>
i think an argument against `else` is that exceptions are exceptional, and shouldn't be used for flow control
<BlakeRG>
also, you guys/gals are saying it's bad to just catch the generic Exception class right? i do understand that
<bnagy>
BlakeRG: did that twice
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<cr3>
where can I find documentation about the various %... possibilities?
<bnagy>
just put all your non-exceptional code in the first clause of the block
<havenwood>
then again, we know to look at `ensure`, just `else` being seldom used seems confusing
<bnagy>
cr3: you could be looking for either String#unpack or Array#pack?
<havenwood>
I do think `MyError = Class.new(StandardError)` is nicer than `class MyError < StandardError; end`.
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<havenwood>
But rarely see the former.
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<bnagy>
well I barely see custom errors
<realDAB>
havenwood: are you a gregory brown disciple? (he recommends that form too)
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<BlakeRG>
bnagy: sorry - i's hard for my to parse one-liners in my head right now, like i said i'm a total newbie - can you pastebin it?
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<havenwood>
realDAB: maybe his use is where I saw it, dunno
<bnagy>
but I honestly can't muster a shit about either of those forms.. what's the important diff, in yuor opinion?
<cr3>
bnagy: I meant the character I can put in %*{} where * is the documentation I'm looking for
<bnagy>
BlakeRG: no, you're sounding like a homeworker now
<realDAB>
havenwood: btw i agree with you (and gregory) that that's nicer
<bnagy>
cr3: oh ok, google ruby quickref
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<bnagy>
that form is uncommon, though
<BlakeRG>
thanks waxjar
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<havenwood>
bnagy: I find it uncomfortable to have an implicit block that requires an end, with nothing in it. Just seems ugly, no practical difference.
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<bnagy>
k
<cr3>
bnagy: thanks, that'll also help me find documentation for next time :)
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<havenwood>
bnagy: Less common, but i *think* perfectly clear, or at least pretty clear.
<bnagy>
cr3: quickref is AWESOMEz
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<bnagy>
havenwood: not sure I can agree? the explicit inheritance is kinda nice
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<havenwood>
mm
<bnagy>
completely agree that the extra ; end is ugly though
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<bnagy>
I'm going to file it under stuff I don't have a strong opinion about :)
<havenwood>
yeah, i waffle too - a trifle
<bnagy>
mmm trifle
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<BlakeRG>
ok, i understand now why rescuing Exception is a bad idea, and that using else within a begin is not commonly used syntax, but i am still trying to understand how i would know an exception was *not* thrown so that i can log a success message without using else. Any stackoverflow links?
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<jblack>
Hello. I'm having a rough time figuring out how to handle gems right. I'm using mongoid (an ORM for mongodb), and I'd like to learn how to use action_controller. However, when I attempt to include that gem, I get "Unable to activate actionpack-4.0.0, because activesupport-3.2.14 conflicts with activesupport (= 4.0.0), builder-3.0.4 conflicts with builder (~> 3.1.0) (Gem::LoadError)".
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<jblack>
How does one deal with this normally? I tried making a Gemfile that has "Unable to activate actionpack-4.0.0, because activesupport-3.2.14 conflicts with activesupport (= 4.0.0), builder-3.0.4 conflicts with builder (~> 3.1.0) (Gem::LoadError)", because I think action_controller is within there, but I still get the error
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<havenwood>
jblack: maybe try deleting the Gemfile.lock, dunno
<jblack>
I can try that, though I just created the Gemfile for the first time and ran bundle
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<jblack>
I should note that I'm not using a full rails environment
<havenwood>
jblack: might try #RubyOnRails
<jblack>
Ok. sure. Thanks!
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<Veejay>
hanmac: Alrighty then
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<hanmac>
BlakeRG there is a tiny difference in speed, the second one is a tiny bit faster than the first one (because the first is an addional method call)
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<Trudko>
guys I am dividing two integers and i would like the result to have two decimal places so 5/2 = 2.50 ; 4/2 = 2.00 etc
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<havenwood>
Trudko: #round(2)
<BlakeRG>
the second way (as an english speaker) seems more intuitive, i just found out about "unless" yesterday - i am using to doing the !something type conditionals from curly brace languages
<Mon_Ouie>
Ruby doesn't have such numbers. You can of course use regular floats (or whatever) and only display the first two decimal places
<Discordian93>
okay, I've been with this shit for hours, I'm new to ruby and I can't figure out whyt his keeps raising a syntax error: raise SampleError unless(["a","b","c"].include? input[0] & ["a","b","b"].include? input[1])
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<BlakeRG>
oh nice! thanks havenwood
<madumo>
If i have a method that take a &block parameter, am i suppose to be able to send a lambda for this block parameter?
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<hanmac>
Turdko require "mathn"
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<hanmac>
require "mathn"; (5/2).round(2)
<havenwood>
Trudko: To start with, Integers don't divide to Floats. So #to_f one of the Integers or use #fdiv to divide: 5.fdiv(2).round(2)
<Mon_Ouie>
Use IRB for experimenting, avoid spamming the channel with it
<Trudko>
yeah sorry
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<madumo>
If i have a method that take a &block parameter, am i suppose to be able to send a lambda for this block parameter?
<havenwood>
madumo: send it a block
<havenwood>
madumo: method do; your_code_here; end
<madumo>
Yeah that is what i did but i was asking because with the legato gem (a gem to make query to the google analytics api) there is a filter method in the models
<madumo>
and in the doc, they send lambda as parameter
<madumo>
but it was not working at all even if i was pasting the examble
<madumo>
example*
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<havenwood>
madumo: long as it responds to #call
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<havenwood>
dunno
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<madumo>
so i looked out the source code and saw the filter method was taking a block, so i sent a block instead and it worked
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<workmad3>
asteve: if you're meaning 'can I set instance variables in a parent an use them in a child' then the answer is 'yes, but you may be mis-using the variable and it might change behaviour on you without warning'
<asteve>
how would it change ?
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<aces1up>
can someone help me the best way to convert this hash in the way i needed? Was thinking inject, might be good for this.. http://codepad.org/NhCItZts
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<workmad3>
asteve: if you're inheriting from a class in a library, for example, a new version of the library could change the behaviour or remove the ivar entirely
<asteve>
ah, not the problem here
<asteve>
I'm writing the parent and children
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<workmad3>
asteve: you should still think in those terms
<workmad3>
asteve: it encourages the right sort of thinking about encapsulation and information hiding
<asteve>
so every child needs the same variable information set, how would you do it differently?
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<workmad3>
asteve: I'd personally use an attribute accessor around it
<workmad3>
asteve: which promotes the access to part of the public interface of the class
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<asteve>
attr accessor for the parent or the child?
<workmad3>
asteve: and as such, something that the class author (you) has explicitly said is usable
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<workmad3>
asteve: you should be able to figure that out yourself if you just think about which class owns (and therefore controls access to) the data
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<bricker>
Is there a reason "yum install ruby" still only installs 1.8.7? I admit that I don't know much about RPM or where yum pulls from, but that seems awfully out of date
<havenwood>
hanmac: yeah, that's nicer
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<havenwood>
bricker: because you're not on Fedora 19!
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<havenwood>
bricker: 2.0.0-p247
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<bricker>
this is CentOS 6.4
<hanmac>
pah, my ruby is daily fresh ;P
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<zachrab>
hanmac: can you elaborate?
<babykosh>
Is there a simple explanation ….railscast style of how to take an XML file and use it to create you database tables and data…maybe I'm over thinking this?
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<zachrab>
so if i say "%13" % Time.now.to_f will return miliseconds?
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<DylanJ>
babykosh: maybe but i dont know of one off hand. but it shouldn't be too hard. there are gems out there for parsing xslx
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<hanmac>
zachrab: to_f will return seconds, you need to multibly it with 1000 to get them as miliseconds
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<aces1up>
can you guys show me how to create a prepend_keys! function in this code ? http://codepad.org/vqcxP2nD
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<hanmac>
use replace!(prepend_keys(pre_str))
<hanmac>
for sample
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<aces1up>
hanmac replace! is that a hash method? i only see replace on hash.
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<aces1up>
hanmac or is that an enumerable?
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<hanmac>
aces1up: right, its without !
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<aces1up>
hanmac thanks.
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<zalmoxe>
hi
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<zalmoxe>
hm
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<louism2wash>
Hey everyone, when using the '&' with parameter declarations( i.e. def block_test(&block) ) what types of object are valid to pass in as &block?
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<louism2wash>
I think it's just proc, lambda and method
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<ChristianS>
louism2wash: anything that can be called i think -- which is basically what you say
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<fryguy>
i think it's anything that responds to the "call" message
<ChristianS>
yes
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<fryguy>
which could be arbitrary objects
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<dukedave>
How can I get an iterator over the lines in a File, such that I can call f.next() to get each line in turn?
<dukedave>
I see readlines, but that returns the whole array in one go
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<dukedave>
And I don't want .each &block, because then the iteration is controlled by that block
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<fryguy>
dukedave: open.each_line
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<dukedave>
fryguy, bingo! Thanks :D
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<Mon_Ouie>
You can also just have .each without a block
<nwertman>
Is there a decent continuous-integration script I can setup on one of my machines (internally)? I need to automate the testing of my company's internal tools.
<Mon_Ouie>
(as with most methods that iterate over a collection with a block, in fact)
<nwertman>
I'm mainly looking for good experiences folks have had with setup/deploying/etc.
<dukedave>
Mon_Ouie, ah, thanks
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<bricker>
Hello people, I'm trying to install nginx with passenger (passenger-install-nginx-module), and getting this error: https://gist.github.com/bricker/6083582 Can someone point me in the right direction?
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<brisbin>
louism2wash: the actual answer is anything that responds to #to_proc
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<jblack>
Has anybody come across any ORM controller classes or gems outside of rails?
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<havenwood>
jblack: For what type of db? Ohm and Sequel are nice.
<jblack>
Mongoid.
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<tubbo>
jblack: mongoid is the ORM, mongoDB is the database. iirc mongoid is outside of rails.
<jblack>
I'm using mongoid and sinatra outside of rails. I'm looking for something that would provide a good start as a controller to deal with the lack of integrity protection with update_attributes and relationships
<tubbo>
doesn't it just use activemodel?
<tubbo>
jblack: what do you mean by "integrity protection"?
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<jblack>
If you do an update_attributes (relationship: ""), you just wiped relationships.
<jblack>
that's not such a good thing if you're pasing update_attributes (request.GET.merge request.POST)
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<jblack>
attr_protect and it's cousin readonly are great for relationship_ids, but things get messy quick my tests caught on that the relationship needs protection too...
<jblack>
which breaks useful things like create!(this:"is" not:"going" to:"work")
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<jblack>
they're whole intent is to prevent -batch- updates. not prevent ouside of ORM updates at all
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<jblack>
what I've read indicates that I should deal with sanitizing up in the controller rather than the model, but I don't have much of a controller... a thin restful pile of sinatra routes that nearly-directly point at the various ORM goodies.
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<jblack>
That's where I got into that actioncontroller stuff earlier, which I did figure out thanks to your help, btw.
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<jblack>
However, I can't figure out how to actually use actioncontroller outside of rails. I've got sinatra here, acontroller there, and how I hook them together, <dunno>
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<DylanJ>
jblack: maybe check out strong_params
<DylanJ>
then you define what params you'll allow the user to pass in
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<jblack>
That would be perfect.
<jblack>
I suppose that's within sinatra?
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<DylanJ>
i dont know. it's a rails 4 thing but also a gem
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<mercwithamouth>
i have a boggle. i'm playing with RSpec. why is it that I can have a method named 'edible?' yet in rspec i have to write "expect(blah).to_not be_edible ...excludes the '?'
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<mercwithamouth>
Is that not part of the actual method name?
<jblack>
Yeah, it looks like it works with ApplicationController, which I don't know how to use with sinatra outside of rails
<DylanJ>
mercwithamouth: rspec does magic and any method? methods are called be_method
<DylanJ>
.visible? => be_visible
<jblack>
maybe.
<DylanJ>
rspec magic
<mercwithamouth>
DylanJ: ok so if we decide to add any sort of punctuation to the methods name when it comes to respec simply ignore it?
<mercwithamouth>
alrighty...sometimes you have to 'forget' in order to learn something new. =)
<DylanJ>
you can still do
<DylanJ>
expect(blah.edible?).to be_true
<mercwithamouth>
DylanJ: ahh i see!
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<mercwithamouth>
ok i like that more...
<DylanJ>
but rspec gives you those extra methods because rspec is like that
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<jblack>
I'm still reading that DylanJ. That might be the missing piece for me
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<DylanJ>
:)
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<Bio>
is it possible to read and write to the terminal at the same time without messing up the input?
<Bio>
i'm trying to do this in ruby, but it seems impossible
<DylanJ>
Bio: if you use ncurses, sure.
<Bio>
ah
<DylanJ>
but otherwise you're going to print where the cursor is
<Bio>
well, i'm pretty sure its possible to do that without ncurses
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<apeiros>
without curses, you'd deactivate echo
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<Bio>
ah
<apeiros>
and write what the user typed yourself
<apeiros>
but it's rather hard
<apeiros>
since you have to emulate *everything*
<Bio>
well, i'll use curses then
<Bio>
:p
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<dankest>
I'm using minitest to test my Ruby application, but my test can't see my class. I have them stored in different files, how do I point the test at my class rb?
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<apeiros>
dankest: you load it by using `require`
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<dankest>
Ugh, why isn't that mentioned in any of the samples
<dankest>
hmm, none of the paths in $LOAD_PATH seem to be my directory
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<duper>
How do I print out numeric IPv4/IPv6 addresses and CIDR blocks that are stored as String's in binary with Ruby? (arbitrary base notations would be even better in order to cover octal, hex, decimal, etc.)
<apeiros>
you can amend $LOAD_PATH by using the -I (capital i) flag with ruby, or by manipulating the $LOAD_PATH global at runtime (it's an ordinary array)
<dankest>
apeiros: Is that normally done on a per-app basis?
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<apeiros>
dankest: depends. I use a runner which does my setup and do `ruby test/runner.rb`
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<duper>
apeiros: sounds like a good way to load trojans;)
<apeiros>
others use `ruby -Ilib test/yourtest.rb`
<apeiros>
others do whatever
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<dankest>
apeiros: Any idea you know off the top of your head where there's documetation for this kind of thing?
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<apeiros>
duper: unpack for low level, adressable (I think) for higher level
<apeiros>
dankest: not really.
<apeiros>
I can point you to code of my own, if that helps you