Filter: Difference between revisions

var evens := array.filterBy::(n => n.mod:(2) == 0).toArray();

evens.forEach:(printingLn)

.filterBy::(int n => n.mod:(2) == 0)

.forEach::(int i){ console.printLine(i) }

Using the filter() function filters by a function or regex and returns ana arraylist of values.

writeln " array list: ", .arrlist

writeln "filtered: ", filter ffn{div 2}, .arr</syntaxhighlight>list

<pre> array list: [1, 2, 3, 4, 5, 6, 7]

<syntaxhighlight lang="ruby">var arr = [1,2,3,4,5];

var new = arr.grep {|i| i.is_even %% 2};

say new.dump; # => [2, 4]

arr.grep! {|i| i.is_even %% 2};

say arr.dump; # => [2, 4]</syntaxhighlight>