Confusingly, RVM installs the bundler gem into the @global gemset, which is available to all gemsets and Rubies.

You can get around this and install a particular bundler version like this:

rvm @global do gem uninstall bundler
rvm @global do gem install bundler -v 1.6.5

Firefox 5.0.1, which we were using for most Rails 2.3 projects, does not run on Ubuntu 14.04 any more. Here is how to update affected projects.

1. Update (or create) .firefox-version with the content: 24.0
   If you haven't installed Firefox 24 yet, the next time you run tests with Geordi, it will tell you how to install it.

2. On a Rails 2 project:

   • Update your Cucumber-related gems as described in Upgrading Cucumber and Capybara, including cucumber_spinner and launchy.

   • If you...

If you have this problem when you update your FreeBSD Ports:

===>>> Launching child to update ruby19-iconv-1.9.3.547,1 to ruby20-iconv-2.0.0.576,1

===>>> All >> ruby19-iconv-1.9.3.547,1 (17/17)

===>>> Currently installed version: ruby19-iconv-1.9.3.547,1
===>>> Port directory: /usr/ports/converters/ruby-iconv

	===>>> This port is marked IGNORE
	===>>> Not needed with Ruby 2.0 or newer


	===>>> If you are sure you can build it, remove the
	       IGNORE line in the Makefile and try again.

===>>> Update for ruby19-iconv-1.9.3.547,1 f...

The asset pipeline changes the paths of CSS files during precompilation. This opens a world of pain when CSS files reference images (like jQuery UI) or fonts (like webfont kits from Font Squirrel), since all those url(images/icon.png) will now point to a broken path.

In the past we have been using the vendor/asset-libs folder ...

We upgraded a Rails 2 application to Rails 3.2 and Ruby 2.1, changed the mysql adapter from mysql to mysql2, but did not activitate the asset pipeline. Instead we used Sass the old-school way (stylesheets in public/sass/*.sass) and relied on stylesheet_link_tag to activate the Sass compiler.

Now all Sass-generated stylesheets inserted the following text into body:before:

Encoding::CompatibilityError: incompatible character encodings: UTF-8 and ASCII-8BIT

I could get rid of this by removing all generated .css files in `...

Create beautiful Javascript charts with one line of Ruby.

Promising chart library for easily rendering charts with Google Charts.

This seems to not submit your data points to Google.

tl;dr: Use with_index

ActiveRecord's find_each with index

If you do not provide a block to find_each, it will return an Enumerator for chaining with other methods:

Person.find_each.with_index do |person, index|
  person.award_trophy(index + 1)
end

Ruby's map with index

Similarly, you may need an index when using other methods, like map, flat_map, detect (when you need the index for detection), or similar. Here is an example for map:

people...

Nice tutorial about packaging Ruby bindings to your API in a Ruby gem, with tests using VCR casettes.

There are different ways to run rake:

• On Rails 4.1+ projects, you have Spring and its binstubs which dramatically improve boot-up time for Rake and similar. You need to run bin/rake to use them.
• On older projects, you want to run "bundle exec rake" to avoid those ugly "already activated rake x.y.z" errors that hit you when different rake versions are installed for your current Ruby.

Here is a solution that gives you a plain rake command which uses a binstubbed bin/rake if available and falls back to bundle exec rake if necessar...

The flip-flop operator is a hotly contested feature of Ruby. It's still struggling to find an idiomatic use case, except for a few very rarely needed things. It's not something you'll likely reach for on a daily, weekly or even monthly basis. The only thing you really need to know about it is what it does, and that's only in case you encounter it in someone else's code. Many even go as far to say not to use the flip-flop operator, that it only adds confusion.

My brain just melted.

If you get an error like this:

An error occurred while installing pg (0.17.1), and Bundler cannot continue.
Make sure that gem install pg -v '0.17.1' succeeds before bundling.

Then do this:

sudo apt-get install libpq-dev

... and run Bundler again.

Microsoft Exchange service administrators can enable Exchange Web Services (EWS) which is a rather accessible XML API for interacting with Exchange. This allows you to read and send e-mails, create appointments, invite meeting attendees, track responses, manage to-do tasks, check user availability and all other sorts of things that are usually only accessible from Outlook.

You can implement an EWS by hand-rolling your XML (the [docs](http://msdn.microsoft.com/en-us/...

require 'net/http'

module Cheat
  extend self # the magic ingredient

  def host
    @host ||= 'http://cheat.errtheblog.com/'
  end

  def http
    @http ||= Net::HTTP.start(URI.parse(host).host)
  end

  def sheet(name)
    http.get("/s/#{name}").body
  end
end

# use it
Cheat.sheet 'migrations'
Cheat.sheet 'singletons'

Great gem to consume RSS feeds. I was missing some features on Ruby's RSS::Parser that I found in Feedjira:

• Speed
• Does not break on slightly malformed RSS feeds (like a missing length attribute on an <enclosure> tag on gizmodo.de's feed)
• It automatically resolves Feedburner-mangled URLs (hooray!)

The GitHub project has only a minimalistic readme. You can find its documentation on their homepage.

You know each_with_index from arrays:

    ['hello', 'universe'].each_with_index do |value, index|
      puts "#{index}: #{value}"
    end
    # 0: hello
    # 1: universe

This also works on hashes. However, mind the required syntax:

    { hello: 'universe', foo: 'bar' }.each_with_index do |(key, value), index|
      puts "#{index}: #{key} => #{value}"
    end
    # 0: hello => universe
    # 1: foo => bar

The reason is that each_with_index yields 2 elements to the block, and you need to deconstruct the first el...

So you have placed a breakpoint somewhere and now want to dig around, but not even inspecting variables is working:

(rdb:3) @order_item
*** Unknown command: "@order_item".  Try "help".

The reason is, you must tell the debugger to evaluate your expression. One workaround is to call irb to open an irb session at your breakpoint. Resume by sending Ctrl+D twice or by returning to the outer irb with "exit" and then continuing with "c".

However, the native debugger command for your issue is eval (or its shorter alias `e...

Parses URLs of social networks to extract IDs or screen names.

It does not get confused by child routes: you may also pass URLs like a user's twitter photo stream and the gem will extract their twitter ID .

Note that it just parses URLs, and does nothing magic like looking up IDs when the URL contains only a screen name (e.g. the Instagram API requires you to send the user ID almost always while you at first only know their screen name).

Spreewald 1.1.0 drops the be_true and be_false matchers in order to be RSpec 3 and Ruby 2 compatible. For backward compatibility, these matchers are replaced with == true and == false.

Note the slightly more changed semantics of the update.

The attached post shows some alternative ways to define Strings in Ruby using the percent notation. This can be useful when you'd like to use quotes (") or single-quotes (') in your strings:

%(any alpha-numeric)
%[char can be]
%%used as%
%!delimiter\!! # escape '!' literal
%( (pa(re(nt)he)sis) ) #=> "(pa(re(nt)he)sis)"
%[ [square bracket] ]  #=> "[square bracket]"
%{ {curly bracket} }   #=> "{curly bracket}"
%< <pointy bracket> >  #=> "<pointy bracket>"
%< \<this...

This actually works:

class Klass

  def initialize
    `hi world`
  end

  def `(message)
    puts "Called with backticks: #{message}"
  end
  
end

Klass.new # Prints "Called with backticks: hi world"

Hat tip to @jcoglan.

The debugger gem does not seem to be properly working on Ruby 2. Use byebug instead!

Byebug is a simple to use, feature rich debugger for Ruby 2. It uses the new TracePoint API for execution control and the new Debug Inspector API for call stack navigation, so it doesn't depend on internal core sources. It's developed as a C extension, so it's fast. And it has a full test suite so it's reliable. Note that byebug works only for ruby 2.0.0 or newer. For...

Automatically builds gems from Bower packages (currently 1700 gems available). Packaged Javascript files are then automatically available in your asset pipeline manifests.

Why we're not using it

At makandra we made a choice to use bower-rails instead. While we believe Rubygems/Bundler to be superior to Javascript package managers, we wanted to use something with enough community momentum behind it that it won't go away in 10 years...

If your requests blow up in Ruby or CURL, the server you're connecting to might only support requests with older SSL/TLS versions.

You might get an error like: OpenSSL::SSL::SSLError: SSL_connect SYSCALL returned=5 errno=0 state=unknown state

SSL Server Test

This SSL Server Test can help finding out which SSL/TLS versions the server can handle.

Ruby

In Ruby, you can teach Net::HTTP to use a specific SSL/TLS version.

uri = URI.parse(url)

ssl_options = {
   use_ssl: true,
   ssl_version...