filter 0.0.6
Synopsys
Enumerable#filter
- extended Enumerable#select
Examples
String filter (acts like Enumerable#grep
):
[1, 2, 3, 'ab'].filter(/a/) # => ['ab']
[1, 2, 3, '3'].filter('3') # => ['3']
You can pass a Proc
or Symbol
. Methods and blocks are allowed too:
[1, 2, 3].filter(&:even?) # => [2]
[1, 2, 3].filter(:even?) # => [2]
[1, 2, 4].filter { |num| num.even? } # => [2, 4]
Enumerable#filter
can match against enumerable items attributes. Like this:
[1, 2, 3, 4.2].filter :to_i => :even? # => [2, 4]
If the block is supplied, each matching element is passed to it, and the block’s result is stored in the output array.
[1, 2, 4].filter(&:even?) { |n| n + 1 } # => [3, 5]
Enumerable#filter
also accepts true
or false
as argument:
[0, false, 2, nil].filter(true) # => [0, 2]
[0, false, 2, nil].filter(false) # => [false, nil]
Enumerable#filter
also supports OR
operator! Just pass many patterns, they will be joined together with OR
operator.
[0, 2, 3, 4].filter(:zero?, :odd?) # => [0, 3]
Gemfile:
=
install:
=
Development Dependencies (1):
rspec
>= 0