<shevy>
I just played around with it, ignore the .to_sym
<shevy>
ellistaa did you not read what I wrote the last 20 times :P
<EllisTAA>
shevy: i did
<shevy>
did you run that code!
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<EllisTAA>
yeah it worked
<EllisTAA>
wait but it looks like its creating symbols instead of nodes?
<EllisTAA>
nvm
<shevy>
you need to learn how to walk before you learn how to run
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<baweaver>
ellistaa: metaprogramming does not exist for you, don't use it. It's insidiously complicated to debug at times and not something someone learning should be using. You'll notice it's exceptionally rare in most pro production code as well.
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<EllisTAA>
baweaver: doesn’t seem that hard
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<baweaver>
apparently
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<baweaver>
you're making things unnecessarily complicated for the sake of using it instead of learning the basics. That's what insidiously complicated means
<baweaver>
it appears deceptively easy
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<baweaver>
which it is, assuming you have a grasp of the basics
<baweaver>
and its tested thoroughly.
<baweaver>
it's*
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<EllisTAA>
so why won’t the code work
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<baweaver>
you said it doesn't seem hard
<EllisTAA>
it doesn’t, that doesn’t mean there’s something i dont understand
<baweaver>
...
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<EllisTAA>
i might not know how to make bread but i wouldn’t say its hard
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<baweaver>
Use a hash
<baweaver>
look into path explosion and implosion
<baweaver>
it's dramatically simpler, cleaner, and easier to understand
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<EllisTAA>
err thanks ill check it out
<baweaver>
the only difference is this has no delimiter whereas typical explosion/implosion problems use '.'
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<kfpratt>
celly: unsolicited help: press command+u and you'll find the server settings for whatever server the channel that you're currently in. Once there you'll see the general tab where you can enter your nick and password. It will identify you on connection from then on.
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<celly>
@kfpratt: thanks man, you rock
<kfpratt>
np
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<newdan>
Is there a method to match a regex only at a certain index? E.g. ideally /foo/.strict_match('ofoo', 0) => nil; /foo/.strict_match('ofoo', 1) => MatchData
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<RickHull>
newdan: probably better to restrict your input string ('ofoo') according to the index
<RickHull>
that is, only send 'foo'
<RickHull>
but i'm assuming this isn't helpful, and that your example was crafted around this
<lannonbr>
Question, is there a simple algorithm that splits a single number into n numbers that add up to the initial number?
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<RickHull>
lannonbr: there are an infinite number of ways to do that
<RickHull>
e.g. 0 + 0 + 0 + number
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<RickHull>
1 + 1 + 1 + number - 3
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<lannonbr>
Oh I forgot, is there a way to randomly do that?
<RickHull>
in stdlib, probably not
<lannonbr>
Wait, I think I might have an idea
<RickHull>
you can write a fn to do it
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<lannonbr>
yea I'm going to do that now
<RickHull>
with random numbers
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<lannonbr>
I basically got it, I just have to fix a few kinks
<hagabaka>
lannonbr: are you doing adventofcode by any chance?
<lannonbr>
Indeed
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<hagabaka>
this one is such a leap in difficulty
<lannonbr>
Is there a better way to do day 15 other than brute force the proportions?
<havenwood>
which day is it?
<havenwood>
ah
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<hagabaka>
I think it's "linear programming", but I don't really get it
<lannonbr>
Well I got the back end of calculating the total, just finding the proportions it what I am stuck at right now
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<hagabaka>
I think there are 10s of millions of combinations to brute force, and just thinking of a algorithm to generate them hurts my head too
<lannonbr>
100 million different combinations
<lannonbr>
Good thing computers are fast
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<lannonbr>
9 and 13 were also brute force, but this is much more difficult
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<hagabaka>
I think you could brute force like 0.upto(100) {|a| 0.upto(100 -a) {|b| ... d = 100 - a - b - c; score(a, b, c, d)
<lannonbr>
Well I just wrote a 4-deep (0..100).each do |i|... thing
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<lannonbr>
At first I had no idea how to do this, but I just finished part 2. It's challenging to understand
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<hagabaka>
yeah I guess it's still very brute-forceable
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<ja>
is there a cleaner way to get `[:foo, :bar].map { |a| [a, nil] }.to_h`?
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<c0dedead>
I am working on a project using Ruby version 1.9.3 that may require me to update it. If I update to version 2.2.3 how likely am I to break things?
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<rdark>
c0dedead: Ruby 1.9.3 was closer to ruby 2.0.0 than 1.8.7, so shouldn't be too much of a jump. Hopefully you have decent test coverage to catch any breakage?
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<c0dedead>
It looks like a lot of them were from bcrypt saying it found an invalid salt. I'm still looking through them.
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<c0dedead>
Is that something that could render my existing data invalid if I update bcrypt?
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<elaptics>
not sure, but I wouldn't have thought so
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<c0dedead>
Updating bcrypt corrected all of the errors.
<c0dedead>
I'm not sure if I should be, but I am worried about the data in our production database. I guess worst case I can just force all users to update their passwords.
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<marens>
jaja
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<DylanJ>
anyone know how i can xor a bignum with a bignum?
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<KrzaQ>
I'm doing advent of code. I want to enumerate all n-element array that have the same sum (say, k). I came up with this: http://melpon.org/wandbox/permlink/iiQUNAwVYibodegS and it works, but I'm wondering if it can be done in a better way
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<ruboto>
Bish # => [:each, :each_index, :reverse_each, :each_with_index, :each_entry, :each_slice, :each_cons, :each_wi ...check link for more (https://eval.in/485618)
<Bish>
intradesting
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<xabcf>
hi, i am doing
<xabcf>
system('export Y=path')
<xabcf>
and then
<xabcf>
ENV["Y"]
<xabcf>
but it returns nil instead of 'path'
<xabcf>
how can i access the variables exported using system
<Bish>
try Y=$PATH
<xabcf>
or is there any other way to tun system command from ruby
<KrzaQ>
I don't think ENV get's updated when parent's environment changes
<xabcf>
i mean
<Bish>
xabcf: try %x(echo 'path')
<shevy>
xabcf I am not sure you can get the ENV value updated lateron
<xabcf>
system('export Y=abcstring')
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<jhass>
xabcf: just use ENV["Y"] = "path"
<shevy>
perhaps there is some manual way to get it synced lateron at runtime... hmm
<jhass>
shevy: there isn't
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<shevy>
:(
<xabcf>
so one has to have set all the exported values manually which is being in some shell script
<shevy>
time for a pre-xmas PR!!!
<Bish>
or you let them set with the shell script? xabcf
<Bish>
by the*
<shevy>
yeah it's sorta a non-issue in this case because he already manually sets it via system
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<shevy>
so he knows the value so he can manipulate ENV directly
<xabcf>
yes i have a script.sh that exports some variables. And then i run that script from ruby using system('./script.sh') and now i want my variables in ruby
<adaedra>
xabcf: when you do `system('export Y=path')`, you don't set the env in the parent. You create a subshell, set it there, and close the shell.
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<Bish>
xabcf: why not let script.sh invoke your ruby script?
<adaedra>
Or do like ssh-agent: print the variables to set in your script.sh, and then use this output in the parent to fix your own env.
<shevy>
could add an ENV.sync() method or something
<adaedra>
To sync with what?
<shevy>
to how ENV normally gets populated
<adaedra>
You don't have access to parent or children environment.
<shevy>
ENV gets populated
<adaedra>
Yes, using the environment passed by your system at startup.
<Bish>
shevy: script.sh get's his own environment, then sets stuff there, and ends
<Bish>
the env of the ruby script, doesn't get changed
<xabcf>
hmm, but if we want to sync somehow the ENV
<adaedra>
you can't.
<Bish>
that's not what they are for
<adaedra>
that's not how environment works.
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<Bish>
xabcf: can you be more specific in what you're trying to do
<Bish>
like, whats inside those variables
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<xabcf>
but suppose in case of building native extension gem, you call a script.sh through extconf.rb and want to get the exported variables which were set in script.sh
<xabcf>
Bish ^
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<adaedra>
You cannot make environment variables magically go up in processes. Use io or ipc to transmit the variables, xabcf.
<shevy>
he can already manually update ENV syncing should be easily doable
<xabcf>
is this the case with ruby, or is it same with python as well
<adaedra>
It's the case even with C.
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<adaedra>
Each process has its own environment; it is copied in new processes at the time of fork(2), and then is not shareable to other processes. The only way to have a process get your env is to be called by the program calling it.
<apeiros>
xabcf: it's the case with your OS
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<apeiros>
and note that this is indeed a feature, not a bug. being able to override a parent's env would be a security issue.
<adaedra>
I think environment is not the storage you want.
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<adaedra>
hi apeiros, thanks for the support :p
<apeiros>
adaedra: for you, always ;-D
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<xabcf>
hmm right
<xabcf>
so manually setting ENV is the way to go
<adaedra>
Well, there may be others ways.
<shevy>
yeah like a baby you have to manually update all the variables on your own :)
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<xabcf>
hmm
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<adaedra>
As I said above, maybe ENV is not what you're looking for. You could output a file and read it in Ruby process, for example.
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<xabcf>
ENV['x'] = `ls`.chomp
<xabcf>
like this
<xabcf>
?
<jhass>
or likely even compute the values you compute in your shellscript in ruby
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<Bish>
execute it inside a fork, attach to the process with ptrace and then read out the environment variables with writing a thread in x86 assembler
<Bish>
sounds reasonable to me!
<jhass>
xabcf: what kind of variables are we talking about here really? got any real world example instead of the fake stuff?
<xabcf>
ENV['x'] = `ls`.chomp
<shevy>
xabcf this is of course moot since you can obtain these information from plain ruby too
<adaedra>
Bish: sssh, they may think it's ok to do.
<xabcf>
this creates a fork first and then attaches the value to ENV
<xabcf>
right ?
<Bish>
it's a okay thing to do!
<Bish>
no it's crazy, don't do that
<jhass>
?xy xabcf
<ruboto>
xabcf, it seems like you are asking for a specific solution to a problem, instead of asking about your problem. This often leads to bad solutions and increases frustration for you and those trying to help you. More: http://meta.stackexchange.com/a/66378
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<xabcf>
execute it inside a fork, attach to the process with ptrace and then read out the environment variables with writing a thread in x86 assembler . Bish, this is hard for me to understand
<xabcf>
thats why i asked specifically
<xabcf>
sorry if that breaks any irc manner
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<Bish>
xabcf: it would be the hardest way to do , there is
<Bish>
but it would probably do what you want to do
<Bish>
you still shoudn't, printing to a pipe would bbe more easy, by far
<adaedra>
xabcf: Bish's solution is not the thing to do. Ignore it.
<adaedra>
Bish: see!?
<xabcf>
hehe
<Bish>
im sorry :p
<jhass>
well can't say we didn't try to lead you to a proper solution, if you prefer to ignore our advice I see no sense in continuing the discussion
<adaedra>
xabcf: explain us what you're trying to do in the first place; we may help you find a better solution
<xabcf>
i want to set compiler flags (CC, CXX) while building native extension
<xabcf>
and these CC, CXX would differ for linux, darwin
<jhass>
why do you need to compute the values inside a shellscript?
<jhass>
also doesn't mkmf have its own settings for those?
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* Bish
wishes the ptrace gem would actually work
<xabcf>
because there were few other things as well that i had in the script.sh so i though of export it through script.sh and getting them through ENV or something in ruby
<xabcf>
mkmf settings ?
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<jhass>
apparently not, mh
<shevy>
xabcf one obvious workaround would be to source the .sh script that sets it before you start ruby
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<jhass>
xabcf: I repeat myself, what makes computing these values from Ruby impossible or even just hard?
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<xabcf>
nothing jhass.
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<xabcf>
i can do that
<xabcf>
but i thought i could make my extconf.rb cleaner
<jhass>
then why waste time on this trying to reuse your shell script no matter what
<jhass>
I doubt so
<xabcf>
hmm yeah
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<Bish>
is there a cool x86 debugging tool for ruby?
<Bish>
i tried Ptrace and rtrace, they both don't work
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<adaedra>
24 letters left to test then.
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<GinoManAFK>
Hey, is there a difference between puts and print?
<toretore>
\n
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<jhass>
GinoManAFK: puts appends a trailing newline unless there already is one
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<jhass>
GinoManAFK: it also has a different behavior when passed an array
<GinoManAFK>
What behavior does it have when passed an array?
<jhass>
?try
<ruboto>
Why don't you try it and see for yourself?
<GinoManAFK>
hmmm
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<shevy>
GinoManAFK puts will ensure that one \n is at the end
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<jhass>
shevy: I think I already said that?
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<Bish>
if i do puts "x\n" it will not add an \n?
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<Bish>
interesting, didn't know that.
<shevy>
jhass I did not read what you wrote when I looked at the tab here
<shevy>
I am multitasking!
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<shevy>
Bish yeah that confused me too once
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<shevy>
puts "hello world!" would yield the same result as a puts "hello world!\n" would
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<GinoManWorks>
print actually prints the .to_s of the array itself, puts prints each string in the array on it's own line.
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<shevy>
so suddenly you mention an array
<shevy>
:)
<jhass>
GinoManWorks: exactly!
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<jhass>
shevy: you still didn't read what I wrote then ...
<shevy>
jhass is this required?
<jhass>
shevy: for that type of comment you just made, yes
<shevy>
jhass no I don't think it is required
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<GinoManWorks>
sorry, I crashed Quassel trying to renick myself as GinoMan@work.... I feel like if that's not legal it should have caught that and told me so
<GinoManWorks>
rather than crashed.
<shevy>
have you tried /j #0 or something yet
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<jhass>
GinoManWorks: well, get a better client then :P
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<shevy>
quassel is a very strange name... then again so is peechat
<shevy>
jhass does crystal have an IRC client yet? :)
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<shevy>
hmmm next time I stroll into crystal, I will look at the GUI bindings
<GinoManWorks>
shevy: That's really the only reason I didn't put a whole lot of energy into learning ruby through and through; there really isn't a super mature and robust gui library for it like there is for C/C++
<jhass>
shevy: there is a client library or two
<GinoManWorks>
There's rails for web apps which I've heard is awesome but
<shevy>
jhass cool
<GinoManWorks>
mostly the only gui stuff for ruby are bindings to C/C++ gui libraries.
<jhass>
well of course
<jhass>
it's not a wheel you want to reinvent in every language
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<jhass>
I mean look at what a pain Swing GUIs are to use (and write)
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<GinoManWorks>
jhass: That's true, but for example, Qt, which is what I know how to use, is taylored to C++'s strengths and weaknesses and uses the full extent of C++ and even a seperate meta-object compiler to make gui programming easy and fully integrated with the language.
<blub>
i just finished bashing together a cocoa thing in lisp like five minutes ago i really hate interfaces but those bindings are pretty good..
<shevy>
I think python has had something similar... anaconda? or whatever it was where you could both have ncurses and gtk
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<shevy>
cacao and lisp sounds like a cool combination!
<GinoManWorks>
Cocoa I liked a lot
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<GinoManWorks>
I hated it at first because it was all gui based instead of codebased but when I realized that the design actually makes it *more* powerful than handcoding things, I realized how productive I was being in it and grew to like it a lot
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<Verde`>
Ooh thanks dorei, that may actually be my ticket here
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<Verde`>
Didn't think of Mhash in the context of Ruby yet :-/
<Bish>
cored: well, can you tell me, where it should break?
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<cored>
Bish: so linked is inside the links key instead of in the root of the JSON, I think that's an issue because that means that I can put the root nodes inside any node without a problem
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<Bish>
i see linked outside of links
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<cored>
hm
<cored>
wait
<Verde`>
Thanks cored, that solved my issue
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<Bish>
cored is a good guy
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<cored>
Verde`: hm?
<cored>
Bish: updated it
<Bish>
(he means dorei)
<cored>
Bish: specs keep passing
<cored>
well I'm a good guy either way, right Bish ?
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<Bish>
im sure!
<Verde`>
cored, mhash I mean
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<Bish>
mhash is a good guy
<Verde`>
I'm going back in, god speed gents
<Bish>
HACKING IN PROGRESS
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<KrzaQ>
I was wondering if it's possible to make my permutations generator nicer (it's supposed to make k-element arrays that sum up to a specified value)
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<vasilakisfil>
so I have this little ruby program: http://pastie.org/private/rmgiifat6ysbtemnqja44g it fires a tons of requests in my rails API, but it keeps the alive threads constant. If I set ulimit -n 100 (allow 100 open fd) it craches almost in 10 seconds. If I set ulimit -n 1024 it craches after 1 minute. Why aren't socket fd closed? do I do something wrong ?
<Bish>
cored: still can't see where it breaks your shema
<vasilakisfil>
obviously if I want it to run for 5 hours I can't fix it by increasing the fd limit
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<cored>
Bish: what I think should fail is the fact that I have a nested attribute in the JSON schema but in the response that attribute is not nested
<Bish>
yeah i am not a native speaker, i mean where your data is not valid according to your shema
<vasilakisfil>
jhass I don't want per request timeout but rather a global timeout so I am not sure if that helps
<jhass>
vasilakisfil: and yeah, you never seem to remove stuff from requests?
<cored>
Bish: well, no the data is valid what is not valid is the structure of it according to the schema, that's what I want to also be enforce
<Bish>
hngg
<Bish>
i understand what you're trying to say, but i cannot see where
<vasilakisfil>
what do you mean? when the request is done, the method returns so actor terminates
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<cored>
Bish: well did you see the output?
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<jhass>
vasilakisfil: fire returns a reference to the response object
<cored>
Bish: if you see the output linked is not nested in links but in the schema it is; I think that should make the spec to fail
<jhass>
which you append to the requests array
<jhass>
and never remove
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<Bish>
cored: well you have required "linked" in root
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<vasilakisfil>
yes but when the request is done I return some objects.. I mean no point of keeping the connection alive there.. I think I should add the Connection: close header
<Bish>
so it should fail, when its missing, shouldn't it?
<cored>
Bish: right, probably this is not supported
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<Bish>
dafuq? i mean.. you say "this is broken because linked is in root, while it should be in links"
<jhass>
vasilakisfil: even if that stops leaking FDs, you'll leak memory still
<Bish>
but the root says "linked is required"
<Bish>
so it should break, if there is no linked in root
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<Bish>
maybe im the wrong person to answer this, because im a confused guy, but i can't see a mistake in the gem
<cored>
Bish: the opposite
<cored>
Bish: it should fail because linked is not in the root it's inside the links key
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<Bish>
but it isn't or am i blind
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<Bish>
there are two }} before "Linked", meaning it is in root
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<cored>
I'm tseting wth a simple schema and data
<cored>
wait
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<Bish>
there is no need to simplify it for me :D but i can't see a violation of your schema
<cored>
Bish: hehe, you are right it was my mistake
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<cored>
Bish: you are right, what needs a required linked is the root node not the links so that's why is not failing because the required node is in the response
<Bish>
woop wooop
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<jhass>
cored: don't forget to set "additionalProperties": false in your schema, it's not forbidden by default
<jhass>
cored: also make sure to use fully_validate over validate, irrc
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<jhass>
so you get all issues at once
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<cored>
jhass: yes using fully_validate
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<cored>
did not know about the additionalProperties
<vasilakisfil>
modifying the array in the each block is a bad idea ?
<cored>
thanks
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<jhass>
vasilakisfil: it usually leads to hard to understand code
<ljarvis>
vasilakisfil: yes
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<cored>
vasilakisfil: it depends but there are simpler way to implement that type of stuffs
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<jhass>
vasilakisfil: while request = requests.shift;
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<vasilakisfil>
I have the array that loops with the each block and afterr X loops I want to append a value so it keeps looping.. but at the same time I have to start deleting the first items in order not to have memory leak
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<jhass>
vasilakisfil: anything wrong with my last suggestion?
<cored>
jhass: if I use additionalProperties: false at the top level will it apply to the entire json schema?
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<jhass>
cored: uh I don't remember but I don't think so, I think it only applies to the currently defined object
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<vasilakisfil>
jhass yes it doesn't work unless you meant something else. Firstly shift modifies the object so it's just requests.shift. Secondly it seems like .each uses an internal counter when looping so when removing an item in the start of the array and adding an item in the end of the array, there is no different for .each, it continues looping using the internal counter. So since requests.size is constant, it stops after a while
<vasilakisfil>
at least that's what I understand, I don't know how .each works exactly
<jhass>
vasilakisfil: I didn't say use it inside .each ...
<vasilakisfil>
ah ok sorry my bad
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<Bish>
&& is not a method, right?
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<vasilakisfil>
given an array of celluloid features, for each one that resolves (returns a value) I want to create a new one.. how can I do that? I tried modyfying the array inside the each block but obviously it doesn't work
<vasilakisfil>
sorry, celluloid futures
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<adaedra>
Bish: doesn't seem to be.
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<Bish>
hm, im trying to translate a set of "filter expressions" into sequel.filter stuff
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<platzhirsch>
Is there a neater way of writing: array_of_hashes.map { |h| h['key'] } ?
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<ljarvis>
platzhirsch: what's not neat about that?
<Bish>
platzhirsch: wat?
<platzhirsch>
hah
<platzhirsch>
like .map(&:method_name)
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<ljarvis>
no
<Bish>
especially wha tyou wrote, "prettier" is just "array_of_hashes" :D
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<ljarvis>
they didn't say prettier but yeah
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<ljarvis>
it's basically not possible, platzhirsch. Your code is fine
<platzhirsch>
thanks
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<vasilakisfil>
is there a way to modify the each counter ?
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<Bish>
how can i dynamicially create a proc that "ands" things?
<Bish>
i need a proc for generating a sequel filter
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<ljarvis>
where does a && b && c come from inside the proc?
<Bish>
sequel allows me to do things like dataset.where :id == 3 }
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<ljarvis>
ok, we're getting there with some real info, more examples would be helpful
<ljarvis>
ones that aren't a && b && c
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<Bish>
yeah utf8 is broken in this terminal can't writ eit out
<vasilakisfil>
http://pastie.org/private/nitwcnwouvs9bxgzjb3mq likes 84 - 91. I need somehow to remove the first item in the array, append another item in the array and keep looping over the array. I was thinking modifying the index in the each_with_index but it doesn't work
<ljarvis>
Bish: gist.github.com
<Bish>
i have filter expressions in an array like [{type:"equal",field:"fieldname",params:["peter"]}]
<ljarvis>
vasilakisfil: use a new array for the new requests
<Bish>
and i want dynamicially create a proc which puts them all together
<ljarvis>
hmm ok, do you do any sanitization or is this it?
<Bish>
request.query is just {"key"=>"value"} then
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<Bish>
this is it, but as i said i wasn't planning on keeping it this way
<ljarvis>
well I think the part you dislike (the loop + @table = @table.xxx) is absolutely fine
<Bish>
:(
<Bish>
which part is not fine?
<Bish>
using // on user input?
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<bradland>
ddubs: i used tcpdump to grab the data, and it's identical to the pcars.dump content.
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<Bish>
why does sequel not have .where!
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<bradland>
so the game setting is a time interval, so i'm thinking it just dumps the contets of this C storage structure to the wire at the specified interval
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<bradland>
that means i should be able to detect any non-zero value and read the length of the number of bytes that constitute SharedMemory.h
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<rubio>
Hi there, i'm trying to make a dynamic module loading, basically my idea is that i have a class Customer and i will like to be able to do: customer_extended_functionality = first_customer.custom_module; so then i can call thinks inside customer_extended_functionality.proc1..... each customer will have a lib/custom/customer_id.rb file with a module Custom_id
<rubio>
i have try something like @@custom = eval(File.new('lib/...').read) and i have the result BUT @@custom is not filled, so each time i need to read a custom function the system i re-loading the custom file :(
<rubio>
ideas?
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<linocisco>
hi all
<havenwood>
hi
<rubio>
hi
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<shevy>
HI
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<optikalmouse>
has anyone had an issue with simplecov where it uses cached files? I’m working within a virtual machine and simplecov keeps reporting on a changed file. the # of lines of code are different even and I’ve removed the coverage folder so the cache it uses should be clear but it isn’t. am I missing smething?
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<alvarolm>
hi all ! :), im thinking in to use encryption (nacl) with http for an API with just one endpoint (e: http://api.service.com) is that a good idea ?
<cored>
so I found a very interesting exception with the json validation Bish
<cored>
if you have required fields in your schema but they are not part of your response, the validation passes
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<apeiros>
cored: "interesting"? wouldn't "bug" be the more fitting term?
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<shevy>
hehe
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<shevy>
you people are adding to my IRC quotes collection!
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<cored>
apeiros: well, yeap that also can define it
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<linocisco>
how can I learn ruby quickly?
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<adaedra>
Reading tutorials, trying to do some projects
<pabs>
linocisco: i recommend the book "Programming Ruby" by dave thomas
<shevy>
linocisco write as much code as you possibly can
<optikalmouse>
linocisco: download it to your brain.
<bradland>
linocisco: what's your background. is this your first language?
<linocisco>
pabs, Programming Ruby 1.9 & 2.0
<linocisco>
The Pragmatic Programmers’ Guide
<linocisco>
Dave Thomas
<linocisco>
with Chad Fowler
<linocisco>
Andy Hunt?
<linocisco>
sorry for my mulitlines
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<linocisco>
bradland, I learnt C in 2001, C++ to the level I can only write screen saver in DOS. no OOP, No Pointers
<linocisco>
bradland, now I forgot most of that
<shevy>
go write your first gem, ideally a game in ruby
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<shevy>
and publish it on rubygems.org too
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<bradland>
linocisco: i'd second the recommendation of "Programming Ruby" by Dave Thomas
<linocisco>
shevy, I am not willing to write game. even all Linux games I saw are not eye catching like windows games as far as I saw. I am just so much into learning ruby to learn rails in no time. My final goal is to develop a database driven website
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<bradland>
linocisco: I would also recommend "Design Patterns in Ruby" by Obie Fernandez
<linocisco>
bradland, yes. thanks again. I have that book in soft copy. it covers 1.9. and 2.0 on cover
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<bradland>
that book will help you once you've learned the basics of the Ruby language
<linocisco>
bradland, thanks alot
<bradland>
godspeed
<c-c>
linocisco: note that "eyecatching" will not have anything to do with platform
<shevy>
oh rails
<c-c>
for that one needs good artists! :)
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<linocisco>
bradland, I have seen that book "Design Pattern" . I am not fully aware of that and what it aims
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<bradland>
most of the problems you encounter will already have solutions
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<bradland>
a "design pattern" is an approach to solving a common problem
<bradland>
it's a higher level concept than simply writing code
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<bradland>
it has to do with how you structure your code
<linocisco>
bradland, thanks. i see. so First book I should read is Programming Ruby and 2nd -> Design pattern?
<alvarolm>
i offer an HTTP API which is part of a SaaS for a business client that exclusively uses TLS 1.2 on machines that have custom third party CAs, recently got a complaint that 'someone' has been changing their settings in the SaaS and exported records with their authorization, its not the first time that this happens, an I'm thinking that we might have to implement an encryption layer at the appliction level, Is a good idea to drop TLS and just use one endpoi
<bradland>
linocisco: yes, that would be a sensible approach.
<bradland>
if your target is web programming, i would suggest starting out with something like Sinatra, which is a simple library for authoring websites that are powered by ruby
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<bradland>
Sinatra is very, very simple. it maps routes (URL paths) to code, but that's all.
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<bradland>
that will allow you to focus on writing Ruby code, rather than learning a framework.
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<bradland>
depending upon your final application goals, you may choose to stay with Sianatra, or move to a larger framework, such as Ruby on Rails.
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<jhass>
alvarolm: elaborate on your motive? Why would TLS not be sufficient?
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<alvarolm>
<jhass> is seems that isn't, MitM atacks seems to be pretty common for us.
<bradland>
sometimes business requirements dictate that data must be encrypted while at rest
<hxegon>
linocisco, Practical object oriented design in ruby might be better if your beginning
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<jhass>
alvarolm: are you maybe conflating transport encryption with authentication and your API lacks the latter?
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<bradland>
alvarolm: pinning this on a MitM attack as a result of a TLS break is a pretty far stretch, unless you mean to say that someone has lost control of their CA.
<jhass>
^
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<bradland>
in that case, it's "not your problem", but I know how this goes. sometimes it's your problem, regardless.
<bradland>
if the business needs dictate that the data needs to be encrypted while at rest, then that's the requirement.
<jhass>
alvarolm: in fact TLS is probably better protecting you from MITM than your own solution ever will. Avoiding replay attacks and such in the right way is hard
<shevy>
I guess for a static .html this is no issue ... but on the commandline hmmmmm...
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<bensarz>
ruby n00b here... I've been googling the hell out of debugging techniques in ruby (I'm using Sublime Text 3). I found Pry and Debugger, (also debugger2) and ruby-debug and pry-byebug and just byebug... I'm using it on Ruby 2.2.3 and Rails 4.2.5. My question is this: is there a debugging standing that allows for break points, stepping over/in/out? I know I could be using RubyMine but I'm on the fence about the licensing...
<bensarz>
don't hesitate to redirect me to articles/SO posts if the answer already exists out there
<shevy>
hmm strange... the commandline md5sum shows the information almost instantly
<bensarz>
couldn't find anything that was less than a year or two old
<jhass>
bensarz: pry-byebug does that and would be my recommendation
<bensarz>
*debugging standard
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<jhass>
perhaps adding pry-stack_explorer and pry-doc to the mix
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<bensarz>
ok awesome, that's good to know, it felt like pry was a bit outdated but I'm probably wrong
<shevy>
require 'digest/md5reverse' is no longer available?
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<jhass>
bensarz: yes, very :P
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<Papierkorb>
how do I convert a Fixnum from network byte order to host byte order?
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<pipework>
Papierkorb: Isn't network usually big and most computers are big, so you'll just have to detect if the machine is little and then handle that?
<pipework>
Or are you needing help handling, not just detecting?
<Papierkorb>
pipework: handling, I know that the received stuff is in network order (so yes, big endian), and need to turn it into host order. host order is little endian here
<jhass>
Papierkorb: I don't it's possible to have an actual Fixnum instance in the wrong byte order
<Papierkorb>
it's a small script, don't really care if it just fits that case
<jhass>
that is if you have the way you obtain it is what needs fixing, not the Fixnum itself
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<Papierkorb>
huh
<jhass>
*don't think
<pipework>
Yeah, I don't even understand what that meant.
<Papierkorb>
Why should a Fixnum care what the byte order it is in?
<pipework>
You'll likely need to use some String#unpack too.
<pipework>
Or #unpack whatever.
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<bradland>
Papierkorb: the reason you're having difficulty getting an answer is because the question isn't entirely clear. internally, you can't affect the byte order of Fixnum within Ruby. you can only affect the byte order of buffers (strings in Ruby).
<bradland>
so you read from the wire in to a string, then use pack/unpack to change the byte order for what will be sent back out over the wire, or persisted somewhere.
<Papierkorb>
I have a Fixnum which I get out of a HEX string which is in big endian. Need a fixnum out of it using whatever the host uses, possibly doing endian conversion
<bradland>
Papierkorb: you'll need to post some code to get more help than what you've got so far.
<Papierkorb>
bradland: parts[7].to_i 16
<Papierkorb>
that's litterally it.
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<bradland>
and parts[7] is a string value, I presume?
<jhass>
Papierkorb: use String#unpack instead
<bradland>
^^
<jhass>
possibly twice to turn the hex into actual bytes and then decode the number
<bradland>
highly recommended that you get familiar with String#unpack and Array#pack if you're going to work with bytes
<pipework>
See my last link.
<pipework>
kinda covers the last minute or so of the chat.
<Papierkorb>
And all I need is ntohl()
<jhass>
String#unpack is Ruby's interface to exactly that function
<jhass>
well s/exactly//
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<bradland>
also, recommend that you set your string encoding to BINARY when creating/modifying strings you intend to use as binary buffers
<jhass>
but functionality class wise
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<ruby-lang706>
hi can anyone help me with a quesiton i have
<havenwood>
ruby-lang706: ask away!
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<ruby-lang706>
it is most likely easy to most of you as i am still learning
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<jhass>
no worries
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<ruby-lang706>
i am doing practice problems and it asks that i create a method that takes an array of integers and returns the sum of all the odd parts
<ruby-lang706>
two problems i am encountering
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<bradland>
Papierkorb: i'll see if i can wire up a method def for you, but i need a few to get through my current work item.
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<ruby-lang706>
if someone gives it anything other than a number it returns non defined local variable
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<Papierkorb>
bradland: Bit twiddling hacks are no issue. main concern was if there was a fast built-in for that
<jhass>
?code ruby-lang706
<ruboto>
ruby-lang706, We can't help you without your code, please post it to https://gist.github.com
<ruby-lang706>
also i dont know how to add the elements in the index but i can output the odd ones
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<ruby-lang706>
ok give me a few i will create a gist
<bradland>
Papierkorb: Array#pack and String#unpack are the fastest (performance wise)
<bradland>
i've benchmarked them
<norc>
bradland: Since I just hopped in, what is this about? You peaked my curiosity already.
<jhass>
Papierkorb: I think the core issue here is that you're asking for specific way to solve it. Give us exact input and exact desired output and soon enough you'll have the most adequate solution
<hxegon>
quick room poll; Anyone here used a text editor and then switched to rubymine? or vice versa?
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<havenwood>
shevy: Do your research! :P
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<shevy>
aaah
<shevy>
the yoghurt package manager
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<hxegon>
the best ruby version manager is arch linux clearly
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<norc>
Hi folks. I somehow have this script lying around http://pastie.org/10634816# (I removed basically a few hundred lines of crap code instead of that task.execute). Is there a more elegant way to parallelize this?
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<norc>
There are only a few hundred nodes around, so I have no need for a worker pool and what not
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<butterlord>
I need some help... I need to change a chunk of HTML on a header/topbar on a specific page. Is this possible? Basically if its the page i specify, display the altered HTML, if not display the normal
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<norc>
butterlord: Is this about rails?
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<bithon>
butterlord: best. name. ever.
<slash_nick>
What's the best way to get `cat path/to/thesefiles_*_*.csv` with ruby?
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<slash_nick>
I'm assuming I can do it with a oneliner without shelling out
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<adaedra>
õ_o
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<finisherr>
Where can I find some good literature on metaprogramming concepts?
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<finisherr>
I'm trying to basically generate methods and classes
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<hxegon>
finisherr, try the seventh level of hell, I hear they have an excellent library. </jk>
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<finisherr>
ha
<finisherr>
I'm just seeing a lot of repetition in some code I'm writing
<finisherr>
maybe i can leverage define_method a bit
<finisherr>
but that's about all i'm aware of
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<norc>
finisherr: Just please, whatever you do. Don't use method_missing. :(
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<shevy>
finisherr there isn't that much really; you have ... define_method method_missing respond_to? and the various *eval* variants
<finisherr>
This might be the wrong approach
<shevy>
and some hooks
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<finisherr>
I'll try to find a good pattern that fits the mold a bit
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<norc>
finisherr: Basically most of the time using various forms of mixins (especially prepend), together with various techniques of defining methods and send gets you pretty far.
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<shevy>
ah yes I forgot about .send
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<shevy>
finisherr if you wanna go totally crazy, also use Fiddle and manipulate pointers
<norc>
That has nothing to do with metaprogramming...
<shevy>
there used to be a collection of evil code in a file called evil.rb
<shevy>
norc I consider what Ox0dea is doing absolutely meta
<hxegon>
necronomicon.rb
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<norc>
shevy: The whole point of metaprogramming extends on reflection, ducktyping - these sorts of things. When you start breaking down into the memory (i.e. Fiddle), that is the exact opposite way..
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<jbrhbr>
man there are so many built-in methods
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<baweaver>
Suggested reading: Enumerable, String. Memorize those two and you're set for a while.
<baweaver>
Scala has more of a kitchen sink than ruby though
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<jbrhbr>
really?
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<jbrhbr>
i haven't used it but that is surprising
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<jbrhbr>
if it's in the core language
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<jbrhbr>
although all of my experience so far has been with rails so it's hard for me to know what rails has monkey-patched in vs what's core at this point :/
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<ruby-lang706>
i tried searching for a method that finds something but returns nothing and all i got was that ruby always returns something
<ruby-lang706>
i stopped with the each_cons and im trying the .any from the page you linked me
<baweaver>
for the other, you want to look into what a stack is. Push elements onto it until you have 3, then sum them.
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<ruby-lang706>
ok ill look up stack now
<bodgix>
I've just tested that TCPSocket.new 'fqdn', port tries the next A record of fqdn if fqdn has multiple A records and the 1st one fails. I didn't find any mentions of that in the docs
<baweaver>
anyways, meetings
<baweaver>
off I go
<ruby-lang706>
ty
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<bodgix>
anyone knows if that's something portable or platform dependent?
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<jhass>
grill: yeah I would expect anything that .is_a?(IO)
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<grill>
how does one open a file with IO
<grill>
i've tried read and sysopen, but neither seem to work
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<viktor_>
ignore #xkcd-signal MODES JOINS PARTS QUITS
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<viktor_>
grill did you try IO.binread("filename")
<grill>
I just used File.open
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<viktor_>
k
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<jhass>
grill: just File.open("foo") do |io|
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<ChameleonSix>
Hello
<ChameleonSix>
Can i ask a question
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<jhass>
?ask
<ruboto>
Don't ask to ask. Just ask your question, and if anybody can help, they will likely try to do so.
<ChameleonSix>
lol
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<ChameleonSix>
It has nothing to do with ruby
<ChameleonSix>
Knowledge is better than grades
<jhass>
?offtopic
<ruboto>
this seems to be off-topic. Please move your discussion to #ruby-offtopic, to keep this channel free for Ruby related problems. Thanks!
<jhass>
!kick ChameleonSix no single line lols
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<ChameleonSix>
Ok sorry
<ChameleonSix>
Do you need great grades to be successful
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<centrx>
Negative
<ChameleonSix>
I can't understand few things in my life
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<ChameleonSix>
I mean singers don't
<centrx>
Singers are not successful
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<ChameleonSix>
Lol
<jhass>
?offtopic
<ruboto>
this seems to be off-topic. Please move your discussion to #ruby-offtopic, to keep this channel free for Ruby related problems. Thanks!
<ChameleonSix>
But i need someone with experience
<ChameleonSix>
People on off topic are retarded
<Coraline>
That's offensive.
<ChameleonSix>
Ok i was joking
<Coraline>
You're not really winning friends here...
<ChameleonSix>
I dont need any irc friends
<jhass>
cool. bye.
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<ChameleonSix>
Hmm
<ChameleonSix>
Offtopic?
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<ChameleonSix>
Only programmers can help me
<ChameleonSix>
Jk
<jhass>
join ##chat if you want general casual talk. If your next sentence isn't a Ruby question I will remove you
<ChameleonSix>
I don't need good grades to be a good ruby programmer
<ChameleonSix>
?
<jhass>
you don't.
<ChameleonSix>
Im at high school anyway
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<ChameleonSix>
But people always say study
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<ChameleonSix>
If you want to go to uni
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<jhass>
this isn't a life support channel
<ChameleonSix>
I can't study fucking history
<ChameleonSix>
It isn't
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<ChameleonSix>
But still
<jhass>
no
<ChameleonSix>
So?
<acovrig>
I’m having a negative sense moment… in (nokogiri) page.xpath('//table[@id="ctl00_ContentPlaceHolder1_GridView1"]/tr').each do |r|; how can `r’ be nil?
<jhass>
acovrig: it shouldn't, how do you assert it is?
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<acovrig>
jhass: my next line is `p r’ and it returns `nil’ ~50% of the time...
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<jhass>
acovrig: do you think you can make a minimal example that we can run and see for ourselves?
<acovrig>
jhass: nevermind, there is a r.xpath line that was returning nil…
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<jhass>
acovrig: yup, was just about to mention :)
<acovrig>
but it does feel odd to have to do a `next if c.nil?’ for each loop...
<jhass>
acovrig: btw I recommend avoiding single letter vars, they're only confusing
<acovrig>
and a `next if c.first.nil?’ and a `next if c.xpath(‘/div’).nil?’ ...
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<acovrig>
yea, I should flush those out to better names (and I started to, but when things refused to make sense I dropped back to single letters for speed fo typing as I am trying to figure out why I’m getting rows with 0 columns, or rows that are “1” instead of an element)
<jhass>
I just made it a habit to basically never use them
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<jhass>
typing row and column isn't that much slower than r and c after all
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<jhass>
acovrig: really? '/td' restarts at the top
<acovrig>
and isn’t there a source_code method (or something like it) to dump the HTML source for the elemnt I have, cuz I kinda can’t read the output of the element with any reasonable amount of time…