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 /*
* call-seq:
* obj.tap{|x|...} => obj
*
* 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}"
* }
*
*/
VALUE
rb_obj_tap(obj)
VALUE obj;
{
rb_yield(obj);
return obj;
}