Method: Object#tap

Defined in:
object.c

#tap {|x| ... } ⇒ Object

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}"

}

Yields:

  • (x)

Returns:



516
517
518
 
# File 'object.c', line 516

VALUE
rb_obj_tap(obj)
VALUE obj;