Flowdock
tap() public

Yields x to the block, and then returns x. The primary purpose of this method is to "tap into" a method chain, in order to perform operations on intermediate results within the chain. 

    (1..10).tap {
      |x| puts "original: #{x.inspect}"
    }.to_a.tap {
      |x| puts "array: #{x.inspect}"
    }.select {|x| x%2==0}.tap {
      |x| puts "evens: #{x.inspect}"
    }.map {|x| x*x}.tap {
      |x| puts "squares: #{x.inspect}"
    }
Show source