method

select

v1_9_3_125 - Show latest stable - Class: Enumerable
select()
public

Returns an array containing all elements of enum for which block is not false (see also Enumerable#reject).

If no block is given, an enumerator is returned instead.

(1..10).find_all {|i|  i % 3 == 0 }   #=> [3, 6, 9]