Common Ruby Idioms

Question

One thing I love about ruby is that mostly it is a very readable language (which is great for self-documenting code)

However, inspired by this question: Ruby Code ex

Answer 1

Nice question!

As I think the more intuitive & faster the code is, a better software we’re building. I will show you how I express my thoughts using Ruby in little snippets of code. Read more here

Map

We can use map method in different ways:

user_ids = users.map { |user| user.id }

Or:

user_ids = users.map(&:id)

Sample

We can use rand method:

[1, 2, 3][rand(3)]

Shuffle:

[1, 2, 3].shuffle.first

And the idiomatic, simple and easiest way... sample!

[1, 2, 3].sample

Double Pipe Equals / Memoization

As you said in the description, we can use memoization:

some_variable ||= 10
puts some_variable # => 10

some_variable ||= 99
puts some_variable # => 10

Static Method / Class Method

I like to use class methods, I feel it is a really idiomatic way to create & use classes:

GetSearchResult.call(params)

Simple. Beautiful. Intuitive. What happens in the background?

class GetSearchResult
  def self.call(params)
    new(params).call
  end

  def initialize(params)
    @params = params
  end

  def call
    # ... your code here ...
  end
end

For more info to write idiomatic Ruby code, read here