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;
}