The Spaghetti Refactory Established 2015

Literally the coolest way to build an array

One of Ruby’s literal syntax shorthands, %i essentially loops over each word, converts to a symbol and adds it to an array. For example:

%i(dog cat mouse)
# => [:dog, :cat, :mouse]

Caveat: This syntax was added in Ruby 2.0, so don’t go trying it in any previous version.