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• Forcing Kernel::method_name to be called in Ruby

  - by Peter

  I want to add a foo method to Ruby's Kernel module, so I can write foo(obj) anywhere and have it do something to obj. Sometimes I want a class to override foo, so I do this: module Kernel private # important; this is what Ruby does for commands like 'puts', etc. def foo x if x.respond_to? :foo x.foo # use overwritten method. else # do something to x. end end end this is good, and works. but, what if I want to use the default Kernel::foo in some other object that overwrites foo? Since I've got an instance method foo, I've lost the original binding to Kernel::foo. class Bar def foo # override behaviour of Kernel::foo for Bar objects. foo(3) # calls Bar::foo, not the desired call of Kernel::foo. Kernel::foo(3) # can't call Kernel::foo because it's private. # question: how do I call Kernel::foo on 3? end end Is there any clean way to get around this? I'd rather not have two different names, and I definitely don't want to make Kernel::foo public.

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• Ruby Alias and module_function

  - by Jesse J

  I'm trying to debug someone else's code and having trouble figuring out what's wrong. When I run rake, one of the errors I get is: 2) Error: test_math(TestRubyUnits): NoMethodError: undefined method `unit_sin' for CMath:Module /home/user/ruby-units/lib/ruby_units/math.rb:21:in `sin' This is the function that calls the method: assert_equal Math.sin(pi), Math.sin("180 deg".unit) And this is what the class looks like: module Math alias unit_sin sin def sin(n) Unit === n ? unit_sin(n.to('radian').scalar) : unit_sin(n) end alias unit_cos cos def cos(n) Unit === n ? unit_cos(n.to('radian').scalar) : unit_cos(n) end ... module_function :unit_sin module_function :sin module_function :unit_cos module_function :cos ... end (The ellipsis means "more of the same"). As far as I can see, this is valid Ruby code. Is there something I'm missing here that's causing the error, or could the error be coming from something else? Update: I'm wondering if the problem has to do with namespaces. This code is attempting to extend CMath, so perhaps the alias and/or module_function isn't actually getting into CMath, or something like that....

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• Ruby Challenge - efficiently change the last character of every word in a sentence to a capital

  - by emson

  Hi All I recently was challenged to write some Ruby code to change the last character of every word in a sentence into a capital. Such that the string: "script to convert the last letter of every word to a capital" becomes "scripT tO converT thE lasT letteR oF everY worD tO A capitaL" This was my optimal solution however I'm sure you wizards have much better solutions and I would be really interested to hear them. "script to convert the last letter of every word to a capital".split.map{|w|w<<w.slice!(-1).chr.upcase}.join' ' For those interested as to what is going on here is an explanation. split will split the sentence up into an array, the default delimiter is a space and with Ruby you don't need to use brackets here. map the array from split is passed to map which opens a block and process each word (w) in the array. the block slice!(s) off the last character of the word and converts it to a chr (a character not ASCII code) and then capitalises upcase it. This character is now appended << to the word which is missing the sliced last letter. Finally the array of words is now join together with a ' ' to reform the sentence. Enjoy

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• format an xml string in Ruby

  - by user1476512

  given an xml string like this : <some><nested><xml>value</xml></nested></some> what's the best option(using ruby) to format it readable like : <some> <nested> <xml>value</xml> </nested> </some> I've found an answer here: what's the best way to format an xml string in ruby?, which is really helpful. But it formats xml like: <some> <nested> <xml> value </xml> </nested> </some> As my xml string is a little big in length. So it is not readable in this format. Thanks in advance!

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• Ruby: counters, counting and incrementing

  - by Shyam

  Hi, If you have seen my previous questions, you'd already know I am a big nuby when it comes to Ruby. So, I discovered this website which is intended for C programming, but I thought whatever one can do in C, must be possible in Ruby (and more readable too). The challenge is to print out a bunch of numbers. I discovered this nifty method .upto() and I used a block (and actually understanding its purpose). However, in IRb, I got some unexpected behavior. class MyCounter def run 1.upto(10) { |x| print x.to_s + " " } end end irb(main):033:0> q = MyCounter.new => #<MyCounter:0x5dca0> irb(main):034:0> q.run 1 2 3 4 5 6 7 8 9 10 => 1 I have no idea where the = 1 comes from :S Should I do this otherwise? I am expecting to have this result: 1 2 3 4 5 6 7 8 9 10 Thank you for your answers, comments and feedback!

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• Escape characters in MySQL, in Ruby

  - by Swards

  I have a couple escaped characters in user-entered fields that I can't figure out. I know they are the "smart" single and double quotes, but I don't know how to search for them in mysql. The characters in ruby, when output from Ruby look like \222, \223, \224 etc irb> "\222".length => 1 So - do you know how to search for these in mysql? When I look in mysql, they look like '?'. I'd like to find all records that have this character in the text field. I tried mysql> select id from table where field LIKE '%\222%' but that did not work. Some more information - after doing a mysqldump, this is how one of the characters is represented - '\\xE2\\x80\\x99'. It's the smart single quote. Ultimately, I'm building an RTF file and the characters are coming out completely wrong, so I'm trying to replace them with 'dumb' quotes for now. I was able to do a gsub(/\222\, "'"). Thanks.

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• how to organize classes in ruby if they are literal subclasses

  - by RetroNoodle

  I know that title didn't make sense, Im sorry! Its hard to word what I am trying to ask. I had trouble googling it for the same reason. So this isn't even Ruby specific, but I am working in ruby and I am new to it, so bear with me. So you have a class that is a document. Inside each document, you have sentences, and each sentence has words. Words will have properties, like "noun" or a count of how many times they are used in the document, etc. I would like each of the elements, document, sentence, word be an object. Now, if you think literally - sentences are in documents, and words are in sentences. Should this be organized literally like this as well? Like inside the document class you will define and instantiate the sentence objects, and inside the sentence class you will define and instantiate the words? Or, should everything be separate and reference each other? Like the word class would sit outside the sentence class but the sentence class would be able to instantiate and work with words? This is a basic OOP question I guess, and I suppose you could argue to do it either way. What do you guys think? Each sentence in the document could be stored in a hash of sentence objects inside the document object, and each word in the sentence could be stored in a hash of word objects inside the sentence. I dont want to code myself into a corner here, thats why I am asking, plus I have wondered this before in other situations. Thank you!

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• Explaining a Ruby code snippet

  - by Michael Foukarakis

  I'm in that uncomfortable position again, where somebody has left me with a code snippet in a language I don't know and I have to maintain it. While I haven't introduced Ruby to myself some parts of it are quite simple, but I'd like to hear your explanations nonetheless. Here goes: words = File.open("lengths.txt") {|f| f.read }.split # read all lines of a file in 'words'? values = Array.new(0) words.each { |value| values << value.to_i } # looked this one up, it's supposed to convert to an array of integers, right? values.sort! values.uniq! diffs = Array.new(0) # this looks unused, unless I'm missing something obvious sum = 0 s = 0 # another unused variable # this looks like it's computing the sum of differences between successive # elements, but that sum also remains unused, or does it? values.each_index { |index| if index.to_i < values.length-1 then sum += values.at(index.to_i + 1) - values.at(index.to_i) end } # could you also explain the syntax here? puts "delta has the value of\n" # this will eventually print the minimum of the original values divided by 2 puts values.at(0) / 2 The above script was supposed to figure out the average of the differences between every two successive elements (integers, essentially) in a list. Am I right in saying this is nowhere near what it actually does, or am I missing something fundamental, which is likely considering I have no Ruby knowledge?

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• Calculations on the iteration count in for loop in Ruby 1.8.7

  - by user1805035

  I was playing around with Ruby and Latex to create a color coding set. I'm more than a novice with C++, but haven't looked at Ruby until now. So, still learning a lot of coding. I have the following block of code below. When attempting to run this, band1 = 1e+02. I've tried band1 = (BigDecimal(i) * 100).to_f thinking maybe there was some odd floating point issue. This is just me trying anything though as an integer multiplied by an integer should create an integer, if I'm still thinking correctly. I've tried a variety of other things as well (things that I can do in C++, but this ain't C++), but to no avail. (1..9).each do |i| #Band 1 (0..9).each do |j| #Band 2 (0..11).each do |k| #Band 3 #Band 3 Start #these are the colors of the resistor bands b1 = $c_band12[i] b2 = $c_band12[j] b3 = $c_band3[k] b4 = "Gold" oms = ((i*100) + (j*10)) * $mult[k] band1 = i*100 band2 = j band3 = $mult[k] end end end Not sure what I'm missing. Should I be using .each_with_index through these iterations? I've tried this: (1..9).each_with_index {|i, indexi| #Band 1 (0..9).each_with_index {|j, indexj| #Band 2 (0..11).each_with_index {|k, indexk| #Band 3 #Band 3 Start #these are the colors of the resistor bands b1 = $c_band12[i] b2 = $c_band12[j] b3 = $c_band3[k] b4 = "Gold" oms = ((i*100) + (j*10)) * $mult[k] band1 = indexk * 100 and I get the same answer. I can't see why 1*100 should equate to such a large number? Thank you, AT

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• WEBrick::HTTPStatus::LengthRequired error when accessing create method in controller

  - by Chris Bisignani

  I have a very simple controller set up: class LibrariesController < ApplicationController ... def create @user.libraries << Library.new(params) @user.save render :json => "success!" end ... end Basically, whenever I try to access the create method of LibrariesController using HTTParty.post I get a WEBrick::HTTPStatus::LengthRequired error on the server. The method is not even being accessed! Here is the stack trace (this is the full output server side - notice that the controller isn't even being accessed): [2010-04-16 00:35:39] ERROR WEBrick::HTTPStatus::LengthRequired [2010-04-16 00:35:39] ERROR HTTPRequest#fixup: WEBrick::HTTPStatus::LengthRequired occured. [2010-04-16 00:35:39] ERROR NoMethodError: private method `gsub!' called for #<Class:0x2362160> /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/htmlutils.rb:17:in `escape' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/httpresponse.rb:232:in `set_error' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/httpserver.rb:70:in `run' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/server.rb:162:in `start' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/server.rb:95:in `start' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/server.rb:92:in `each' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/server.rb:92:in `start' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/server.rb:23:in `start' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/1.8/webrick/server.rb:82:in `start' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/handler/webrick.rb:14:in `run' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/commands/server.rb:111 /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' /usr/local/Cellar/ruby_187/1.8.7-p249/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' script/server:3 I'm running rails 2.3.5 and ruby 1.8.7. Any help would be greatly appreciated. Let me know if you need more details.

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• Reading / Writing from a Unix Socket in Ruby

  - by Olly

  I'm trying to connect, read and write from a UNIX socket in Ruby. It is a stats socket used by haproxy. My code is the following: require 'socket' socket = UNIXSocket.new("/tmp/haproxy.stats.socket") # First attempt: works socket.puts("show stat") while(line = socket.gets) do puts line end # Second attemp: fails socket.puts("show stat") while(line = socket.gets) do puts line end It succeeds the first time, but on the second attempt fails. I'm not sure why. # pxname,svname,qcur,qmax,scur,smax,slim,stot,bin,bout,dreq,dresp,ereq,econ,eresp,wretr,wredis,status,weight,act,bck,chkfail,chkdown,lastchg,downtime,qlimit,pid,iid,sid,throttle,lbtot,tracked,type,rate,rate_lim,rate_max,check_status,check_code,check_duration,hrsp_1xx,hrsp_2xx,hrsp_3xx,hrsp_4xx,hrsp_5xx,hrsp_other,hanafail,req_rate,req_rate_max,req_tot,cli_abrt,srv_abrt, stats,FRONTEND,,,0,0,2000,0,0,0,0,0,0,,,,,OPEN,,,,,,,,,1,1,0,,,,0,0,0,0,,,,0,0,0,0,0,0,,0,0,0,,, stats,BACKEND,0,0,0,0,2000,0,0,0,0,0,,0,0,0,0,UP,0,0,0,,0,22,0,,1,1,0,,0,,1,0,,0,,,,0,0,0,0,0,0,,,,,0,0, legacy_socket,FRONTEND,,,0,0,1000,0,0,0,0,0,0,,,,,OPEN,,,,,,,,,1,2,0,,,,0,0,0,0,,,,0,0,0,0,0,0,,0,0,0,,, all,FRONTEND,,,0,0,10000,0,0,0,0,0,0,,,,,OPEN,,,,,,,,,1,3,0,,,,0,0,0,0,,,,0,0,0,0,0,0,,0,0,0,,, socket_backend,socket,0,0,0,0,200,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,22,22,,1,4,1,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, socket_backend,socket,0,0,0,0,200,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,22,22,,1,4,2,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, socket_backend,socket,0,0,0,0,200,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,22,22,,1,4,3,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, socket_backend,socket,0,0,0,0,200,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,22,22,,1,4,4,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, socket_backend,socket,0,0,0,0,200,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,22,22,,1,4,5,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, socket_backend,socket,0,0,0,0,200,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,22,22,,1,4,6,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, socket_backend,socket,0,0,0,0,200,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,22,22,,1,4,7,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, socket_backend,socket,0,0,0,0,200,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,21,21,,1,4,8,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, socket_backend,socket,0,0,0,0,200,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,21,21,,1,4,9,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, socket_backend,socket,0,0,0,0,200,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,21,21,,1,4,10,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, socket_backend,BACKEND,0,0,0,0,0,0,0,0,0,0,,0,0,0,0,DOWN,0,0,0,,1,21,21,,1,4,0,,0,,1,0,,0,,,,0,0,0,0,0,0,,,,,0,0, api_backend,api,0,0,0,0,200,0,0,0,,0,,0,0,0,0,UP,1,1,0,0,0,22,0,,1,5,1,,0,,2,0,,0,L4OK,,0,0,0,0,0,0,0,0,,,,0,0, api_backend,api,0,0,0,0,1,0,0,0,,0,,0,0,0,0,UP,1,1,0,0,0,22,0,,1,5,2,,0,,2,0,,0,L4OK,,0,0,0,0,0,0,0,0,,,,0,0, api_backend,api,0,0,0,0,1,0,0,0,,0,,0,0,0,0,DOWN,1,1,0,0,1,21,21,,1,5,3,,0,,2,0,,0,L4CON,,0,0,0,0,0,0,0,0,,,,0,0, api_backend,BACKEND,0,0,0,0,0,0,0,0,0,0,,0,0,0,0,UP,2,2,0,,0,22,0,,1,5,0,,0,,1,0,,0,,,,0,0,0,0,0,0,,,,,0,0, www_backend,ruby-www,0,0,0,0,10000,0,0,0,,0,,0,0,0,0,UP,1,1,0,0,0,22,0,,1,6,1,,0,,2,0,,0,L4OK,,0,0,0,0,0,0,0,0,,,,0,0, www_backend,BACKEND,0,0,0,0,0,0,0,0,0,0,,0,0,0,0,UP,1,1,0,,0,22,0,,1,6,0,,0,,1,0,,0,,,,0,0,0,0,0,0,,,,,0,0, /Users/Olly/Desktop/haproxy_stats.rb:14:in `write': Broken pipe (Errno::EPIPE) from /Users/Olly/Desktop/haproxy_stats.rb:14:in `puts' from /Users/Olly/Desktop/haproxy_stats.rb:14 What is the problem? Is there a good reference to using UNIX sockets and Ruby?

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• Is there or why not having a ruby technology specification similar to Java's JSR?

  - by romeu.hcf

  I think on a community portal where specifications are made, documented and specified to reference libraries and systems implementation. An example: A specification for Message Queue where redis clients, for instance, could implement it and where the libraries could be validated by the specification's test suite. Redic, redis-rb, hiredis, redis-connection-pool, redis-namespace should all implement this specification. This way, being easily replaced.

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• How to create custom omniauth provider (how to return data)

  - by user2803917

  I searched all around the net, how to create a custom provider for omniauth.. and i succedded partly.. I created a gem, and it worked perfectly, except the part, that i cant understand how to return the gathered data to sessions controller, like other providers do.. here is the code in auth gem: require 'multi_json' require 'digest/md5' require 'rest-client' module OmniAuth module Strategies class Providername < OmniAuth::Strategies::OAuth attr_accessor :app_id, :api_key, :auth def initialize(app, app_id = nil, api_key = nil, options = {}) super(app, :providername) @app_id = app_id @api_key = api_key end protected def request_phase redirect "http://valid_url" end def callback_phase if request.params['code'] && request.params['status'] == 'ok' response = RestClient.get("http://valid_url2/?code=#{request.params['auth_code']}") auth = MultiJson.decode(response.to_s) unless auth['error'] @auth_data = auth if @auth_data @return_data = OmniAuth::Utils.deep_merge(super, { 'uid' => @auth_data['uid'], 'nickname' => @auth_data['nick'], 'user_info' => { 'first_name' => @auth_data['name'], 'last_name' => @auth_data['surname'], 'location' => @auth_data['place'], }, 'credentials' => { 'apikey' => @auth_data['apikey'] }, 'extra' => {'user_hash' => @auth_data} }) end end else fail!(:invalid_request) end rescue Exception => e fail!(:invalid_response, e) end end end end and here i call it in my initializers: Rails.application.config.middleware.use OmniAuth::Builder do provider "providername", Settings.providers.providername.app_id, Settings.providers.providername.app_secret end in this code, everything works fine so far, the provider gets called, i get the info from provider, i create a hash (@auth_data) with info, but how do i return it

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• I'm confused with block in ruby, compared to smalltalk.

  - by weakish

  What does block in ruby mean? It looks similar with smalltalk, but you can't send messages to it. For example, in smalltalk: [:x | x + 3] value: 3 returns 6. But in ruby: {|x| x + 3}.call 3 will cause SyntaxError. Well, you can pass messages to lambda in ruby, though: irb(main):025:0> ->(x){x+3}.call 3 => 6 So in ruby, block is not a block, but lambda is a block? Is this true? I mean, are there any differences between ruby lambda and smalltalk block? If this is true, then what is ruby block?

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• Is Ruby on Rails' Active Record an example of Aspect-Oriented Programming?

  - by B Seven

  From Clean Code, about Cross-Cutting Concerns: Note that concerns like persistence tend to cut across the natural object boundaries of a domain. You want to persist all your objects using generally the same strategy, for example, using a particular DBMS... Is Active Record an example of aspect-oriented programming? In AOP, modular constructs called aspects specify which points in the system should have their behavior modified in some consistent way to support a particular concern. This specification is done using a succinct declarative or programmatic mechanism. If Active Record is an example of AOP, what is the "aspect"? Is it the class declaration that inherits from Active Record? class Foo < ActiveRecord::Base

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• Ruby - when to use instance variables vs parameters between methods?

  - by Michael Durrant

  I'm writing several methods that call other methods. To pass the information I have a couple of choices: Pass the information as parameters Set instance variables so that other methods can access them When should I choose one option over the other? It seems that the first option is good as it is very specific about what is being passed. the downside seems to be that a lot of values are being passed around. The second method doesn't require passing all the values around but seems to lead to a lot of magic where methods set instance variables 'somewhere' Should I always be very explicit about gets passed to other methods in the class? Are there exceptions so this?

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• Is Ruby on Rails supposed to have a steep learning curve or is it just me?

  - by Anita

  I'm a self-taught programmer. I've been learning RoR since October with varying intensity (sometimes all day, sometimes nothing for several weeks). Before that I knew only Java, but knew it pretty well. I've heard so much hype about RoR and how it's supposed to make you happy, productive, etc. So far it's only made me frustrated. I learned it out of the Agile book, and I suspect part of the difficulty might have to do with my not knowing JavaScript and CSS, and having only a shaky grasp of databases and HTML. But apparently it took me much longer to complete the project in the Agile book than other people, and I still don't remember much of it. There are some things about Rails that I just can't seem to get, e.g. when to use symbols and when NOT to, or how dynamic methods are called. Recently I was given a small Rails assignment where I'm asked to make a small change to the interface. It's taken me around 25 hours and although I've made some progress in understanding the code, I still have no idea how to proceed. I can't even ask Stack Overflow because there is so much code I'll have to provide to give context. So my question is in the title: is RoR supposed to take a long time to learn or am I just slow? Can it be that I've been learning from the wrong book? My learning style is such that I either understand nothing or understand everything, if that makes sense. Thanks!

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• Ruby on rails not popular in big international IT companies?

  - by maro

  I would like to ask you for advice more experienced ROR developers. I am new in programming and like to idea of ROR and I am before the decision on which programing language to specialize Java vs ROR. In the future I wish to learn for bigger international IT companies (IBM, Accenture etc.) but as I am reading their job openings, most of them are hiring Java, C++, .NET... Is the ROR used only in startups or also in bigger companies as well? What should be the reasons of their preference of Java over ROR?

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• rvm doesnt work when specifiying the path...?

  - by jtzero

  when typing in the path to the rvm it doesnt work $which rvm /usr/local/bin/rvm $ruby -v ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux] $/usr/local/bin/rvm use 1.8.7 Using /usr/local/rvm/gems/ruby-1.8.7-p302 $ruby -v ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux] #now w/o the path $rvm use 1.8.7 Using /usr/local/rvm/gems/ruby-1.8.7-p302 $ruby -v ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-linux] $whereis rvm rvm: /usr/local/bin/rvm /usr/local/lib/rvm /usr/local/rvm .... /etc/bash.bashrc .... if [[ -n "$PS1" ]]; then ... [[ -s "/usr/local/rvm/scripts/rvm" ]] && . "/usr/local/rvm/scripts/rvm" anyone seen this?

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• ruby script/server not reading RAILS_ENV option

  - by iwan

  Hello, I tried to run ruby script/server RAILS_ENV=production but somehow it always try to read "development" config.. nothings wrong with RAKE XXX RAILS_ENV=production (trying to read production config). Any idea how to troubleshoot? I have my other rails app in the same machine and it works fine. The problem above only happen for redmine rails. Thanks in advance. -iwan

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• Ruby IRC bot don't works.

  - by JavaNoob

  require "socket" server = "irc.rizon.net" port = "6667" nick = "Ruby IRC Bot" channel = "#0x40" s = TCPSocket.open(server, port) s.print("USER Testing", 0) s.print("NICK #{nick}", 0) s.print("JOIN #{channel}", 0) This irc bot don't connect to the IRC server, What are i'm doing wrong?

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• Does Objective-C support Mixin like Ruby?

  - by hacksignal

  In Ruby, there's Modules and you can extend a class by "mixing-in" the module. Module myModule def printone print "one" end end Class myClass extend myModule end theOne = myClass.new theOne.printone >> one In Objective-C, I find that I have a set of common methods that I want a number of Class to "inherit". What other ways can I achieve this without creating a common class and deriving all from that common class?

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• Ruby on Rails, how to disable/turn off ETag

  - by Daniel

  Greetings, How do I turn off ETag(s) in Ruby on Rails v2.3.5 When I do a direct request to to the RoR/Mongrel an ETag header is present. TIA, -daniel

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• Escaping '“' with regular double quotes using Ruby regex

  - by DavidP6

  I have text that has these fancy double quotes: '“' and I would like to replace them with regular double quotes using Ruby gsub and regex. Here's an example and what I have so far: sentence = 'This is a quote, “Hey guys!”' I couldn't figure out how to escape double quotes so I tried using 34.chr: sentence.gsub("“",34.chr). This gets me close but leaves a back slash in front of the double quote: sentence.gsub("“",34.chr) => 'This is a quote, \"Hey guys!”'

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• Does Watir work under ruby 1.9.1?

  - by Horace Ho

  Here is the .rb program: require 'watir' b = Watir::Browser.new the 2nd line will trigger a ""The program can't start because msvcrt-ruby18.dll is missing from your computer!" error. I am using 1.9.1p378 on win32 ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-mingw32] How can I fix this? Thanks for your attention.

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