Filter
You are encouraged to solve this task according to the task description, using any language you may know.
Select certain elements from an Array into a new Array in a generic way. E.g., select all even numbers from an Array
Ruby
ary = [1,2,3,4,5,6]
even_ary = ary.select{|el|el%2==0}
# => [2, 4, 6]
Perl
my @list = (1, 2, 3, 4, 5, 6);
my @even = grep { 0 == $_%2; } @list;