tap

obj.tap{|x|...} â obj

Instance Public methods

Yields x to the block, and then returns x. The primary purpose of this method is to âtap intoâ 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}"}

doc_ruby_on_rails

2015-04-24 06:41:35

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