What is the meaning of $$ in Ruby?
irb(main):002:0> $$ => 5052 What is the meaning of $$ in Ruby and How/Where to use it? I do googled it like $$ ruby, but couldn't get desired result. ...
ruby
How do you rate multiple attributes of the same object?
I've not seen this feature as a plug in and was wondering how to achieve it, hopefully using rails. The feature I'm after is the ability to rate one object (a film) by various attributes such as plot, entertainment, originality etc etc on one page/form. Can anyone help? ...
Is it possible to simulate the behaviour of sprintf("%g") using the Rails NumberHelper methods?
sprintf("%g", [float]) allows me to format a floating point number without specifying precision, such that 10.00 is rendered as 10 and 10.01 is rendered as 10.01, and so on. This is neat. In my application I'm rendering numbers using the Rails NumberHelper methods so that I can take advantage of the localization features, but I can't f...
RoR or Python for new development work?
I have spent the last month investigating and learning RoR and Python. I have been developing with PHP for the last few years, but the time has come to move on. To be honest I like both RoR as well as Python and currently leaning more towards RoR. My question is which language do you think is going to have more impact on the web over t...
when I am deploy my ror application on production then I am getting following error
in `gem_original_require': no such file to load -- haml (MissingSourceFile) but this gem already istalled. I have also plugin for this path :-/home/techvant/rails_app/techease/vendor/plugins/haml/init.rb this init file having following code : - begin require File.join(File.dirname(__FILE__), 'lib', 'haml') # From here rescue ...
Ruby TCPSocket recv blocking and never returning.
So, I have the following code: def LSCPHandler.send_message(message, hostname, port) s = TCPSocket.open(hostname, port) s.print message ret = s.recv(1024) s.close LSCPHandler.parse_error(ret) return ret end Which works just fine, normally. The server I'm talking to returns the response pretty quickly, usually, and all is well. ...
When aiming to AOT compile a ruby script with MacRuby is there any restriction on the language?
I am looking into using MacRuby and am interested in it's ability to AOT compile ruby code down to an executable. I am wondering though whether this places a restriction on the code in any way? Is there a subset of ruby which is supported or can i go ahead and perform all the meta-magic i want and still have the code AOT compiled? ...
Set-up Many-to-Many in Rails with destroy allowed for only one of the many
I am trying to model a very simple system, but the Rails way of doing this is escaping me. I'd like to have two entities, a User and a Bet. A bet has two users and a user has many bets. I'd like the creating User of the bet to be able to mark it as resolved (do any form of update/delete on it). My initial thinking was to have a User ac...
Rspec: Is there a problem with rspec-rails when initializing a controller class with super(args)?
Hi there, I've been using Rspec for a while and for some reason am receiving errors on a controller called ReferencesController. The error says that I have to specify the controller name by either using: describe MyController do or describe 'aoeuaoeu' do controller_name :my I've tried both variations: describe ReferencesC...
What languages and frameworks should a freelance developer learn?
I already know all about Linux. I would like to start developing part-time, and be able to fall back on it full time if need be. I am a techie looking make money quickly with the least hassle, doing something vaguely related to my hobbies. I've been thinking about Python because it's beautiful, useful, and I will come closer to learning...
Best practice for installing multiple versions of Ruby, apart from rvm?
I've been running both Ruby 1.8.7 and Ruby 1.9 for a few weeks now. I install Ruby 1.9 with the suffix 19, so that the interpreter, rake, gem, etc. commands are "ruby19", "irb19", "rake19", "gem19", etc. The 1.8.7 equivalents have no suffix and are thus defaults. I figure that's the simplest and most transparent way to manage two versi...
How to cancel Ruby Net::HTTP request?
How do I get Ruby's Net::HTTP module to cancel a request? The call to http.finish below raises an error. I get the impression that the response object doesn't know that the connection was closed and still expects more data. EDIT: I want to avoid making a HEAD request. So, make a get request, unless content-type is html, cancel the requ...
Ruby gsub doesn't escape single-quotes
I don't understand what is going on here. How should I feed gsub to get the string "Yaho\'o"? >> "Yaho'o".gsub("Y", "\\Y") => "\\Yaho'o" >> "Yaho'o".gsub("'", "\\'") => "Yahooo" ...
When to use blocks
I love Ruby blocks! The idea behind them is just very very neat and convenient. I have just looked back over my code from the past week or so, which is basically every single ruby function I ever have written, and I have noticed that not a single one of them returns a value! Instead of returning values, I always use a block to pass the ...
RadRails is very slow on Windows 7.
Hi, I'm trying to use RadRails on Windows and it's works relatively smoothly. But, when i hit F5 in my browser i have to wait ~15 secondes to refresh the page. It's annoying because the CPU usage is around 5% and it's looks like RadRails is doing nothing, no debbuger activity, no sql connection and no server requests during the 15 seco...
Working with a directed graph using RGL in Ruby
I've implemented a directed graph in Ruby using RGL, just having difficulty figuring out how to, for a given node, find only the nodes with incoming connections and the nodes with outgoing connections. Perhaps I'm missing something simple. ...
how to add new field to mechanize form (ruby/mechanize)
there is a public class method to add field to mechanize form I tried .. #login_form.field.new('auth_login','Login') #login_form.field.new('auth_login','Login') and both gives me an error undefined method "new" for #<WWW::Mechanize::Form::Field:0x3683cbc> (NoMethodError) I tried login_form.field.new('auth_login','Login') which give...
String to Array and Hash with Regexp
Hi, I would like to turn a string with opening hours like this: "Monday-Friday>10:00-18:00;Saturday>12:00-17:00;Sunday>12:00-15:00" Into this: [ {:period => "Monday-Friday", :hours => "10:00-18:00"}, {:period => "Saturday", :hours => "12:00-17:00"}, {:period => "Sunday", :hours => "12:00-15:00"} ] I'm trying it with the String.sca...
How to handle unexpected user promts when using Ruby WIN32OLE to control MSWORD?
Hi! I have implemented a ruby script that is capable of opening a word document through the Ruby WIN32OLE automation library and does a search and replace on some specified string. This script is running as a "service", or it is running on a windows server with a session that is allowed to be running forever, and I just push the 'X' in...
Ruby - Mechanize: Select link by classname and other questions
Hello! At the moment I'm having a look on Mechanize. I am pretty new to Ruby, so please be patient. I wrote a little test script: require 'rubygems' require 'mechanize' agent = WWW::Mechanize.new page = agent.get('http://www.google.de') pp page.title google_form = page.form_with(:name => 'f') google_form.q = 'test' page = agent.subm...