This looks like it is safe to use: 2.2.1 :001 > a = b = "hello world" "hello world" 2.2.1 :002 > a
I recommend to go straight to 2.1.5+ without intermediate steps. Otherwhise you burden yourself with unnecessary work of encoding problems...
Ruby has the class Proc which encapsulates a "block of code". There are 2 "flavors" of Procs: Those with "block...
This class contains nerdcore things such as disassembling a piece of Ruby into VM calls or enabling tail-call optimization...
Sometimes you just want to have a small web server that serves files to test something. Serve the current directory...
There are many solutions, but a very concise one is this: hash.merge!(hash) do |key, old_value, new_value|
Sometimes you want to know exactly how many objects exist within your running Ruby process. Here is how: stats = {} ObjectSpace.each...
This is basically Ruby-native syntax for andand.
Ruby has a set of methods to convert an object to another representation. Most of them come in explicit and...
When you make a simple TCP connection to a remote server (like telnet), your client won't normally notice when...
You want to test your 1GE or 10GE internet uplink? We needed to ensure we have full 10GE to the...
Ruby allows multiple assignment: a, b, c = o In order to prove multiple values from a single object, Ruby calls...
The asset pipeline is one of Rails' two mechanisms how stylesheets, javascripts and images from your /assets folder are processed...
Some tasks in a web application are better not done live when a user request a page, but in the...
When a method has keyword arguments, Ruby offers implicit conversion of a Hash argument into keyword arguments. This conversion is...
Writing ruby methods that accept both optional and keyword arguments is dangerous and should be avoided. This confusing behavior will...
Starting with Rails 4.0, when you get an exception reported via the ExceptionNotification gem, you will only see a very...
Starting with Ruby 1.9, most #each methods can be called without a block, and will return an enumerator. This is...
To safely transport an arbitrary string within a URL, you need to percent-encode characters that have a particular meaning...
Method lookup Understand all the terms in How Ruby method lookup works, in particular: include extend singleton class
While debugging an intricate issue with failed HTTP requests I have come to appreciate the more advanced features of the...
Many of our clients can't or don't want to design their user interfaces. In the absence of a...
Ruby has Enumerable.find(&block), which returns the first item in the collection for which the block evaluates to true.
To update your Rubygems to the latest available version, type the following: gem update --system Note that you have a...