2013 was a good year for me in many aspects. I’ll share here some of the programming-related achievements of mine over the year that made me somewhat proud of myself. Achievements Ruby RuboCop...

Projectile 0.10.0 is out! This might come as a surprise for people tracking Projectile’s development, since recent snapshots were using 1.0 as the version number, so allow me to explain. I’ve been...

Sometimes we’d like to build a new collection object from the elements of another collection. One trivial example would be element occurrence counting, which basically means you need to build a ha...

Some Rubyists, when faced with the task of matching against the beginning or the end of a string, are prone to using ^ and $ in their regular expressions. Most of the time the code will seem to wor...

Good news, everyone - RuboCop 0.14 was just released! Generally I announce RuboCop releases in only 140 characters, but this time I’ll make an exception. This release is more significant than most...

Recently we discussed how you can use String#gsub with a block. Today we’ll examine another somewhat unknown feature of the gsub method - the ability to supply a replacement hash as the second argu...

There are whopping 4 ways to invoke a lambda (or a proc) in Ruby: lambda.call(arg1, arg2) lambda[arg1, arg2] lambda.(arg1, arg2) # works only with one argument lambdas lambda === arg The last...

Most Rubyists know they can use literals, classes, ranges and regular expressions in the when branches of a case expression: case something when Array then ... when 1..100 then ... when /some_rege...

For better or for worse Perl had significant influence over Ruby’s initial design. A lot of things were directly borrowed from Perl, but over the years the Ruby community rejected most of the Perli...

Ruby’s Enumerable module is pretty extensive, but from time to time I wish it had some extra methods, that are available in the standard libraries of other languages like Scala, Groovy, Haskell and...