method

tap

v2.3.8 - Show latest stable - 0 notes - Class: Object

1.0.0
1.1.6
1.2.6
2.0.3
2.1.0
2.2.1
2.3.8 (0)
3.0.0
3.0.9
3.1.0
3.2.1
3.2.8
3.2.13
4.0.2
4.1.8
4.2.1
4.2.7
4.2.9
5.0.0.1
5.1.7
5.2.3
6.0.0
6.1.3.1
6.1.7.7
7.0.0
7.1.3.2
7.1.3.4
What's this?

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}" }

Show source

# File activesupport/lib/active_support/core_ext/object/misc.rb, line 53
  def tap
    yield self
    self
  end

tap

Related methods