Multi-line Memoization

Multi-line Memoization.

Memoizing with Ruby’s ||= is ugly when there’s more than one line of code.  The kind folks over at Viget Labs shared this trick:

def foo
  @foo ||= begin
    arg1 = expensive_method_1
    arg2 = expensive_method_2
    expensive_method_3(arg1, arg2)
  end
end

How did I not already know about this? What a readable solution.