Flowdock
method

tap

Importance_1
Ruby on Rails latest stable (v4.2.1) - 0 notes - Class: Object
  • 1.0.0
  • 1.1.1
  • 1.1.6
  • 1.2.0
  • 1.2.6
  • 2.0.0
  • 2.0.3
  • 2.1.0
  • 2.2.1
  • 2.3.2 (0)
  • 2.3.8 (0)
  • 3.0.0
  • 3.0.5
  • 3.0.9
  • 3.1.0
  • 3.2.1
  • 3.2.3
  • 3.2.8
  • 3.2.13
  • 4.0.2
  • 4.1.8
  • 4.2.1
  • What's this?

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v2.3.8) is shown here.

tap() public

Yields <code>x</code> to the block, and then returns <code>x</code>. 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}" }
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