GoLang Ds\Set::filter

request it (55)
GoLang replacement for PHP's Ds\Set::filter [edit | history]



Do you know a GoLang replacement for PHP's Ds\Set::filter? Write it!

PHP Ds\Set::filter

PHP original manual for Ds\Set::filter [ show | php.net ]

Ds\Set::filter

(PECL ds >= 1.0.0)

Ds\Set::filter Creates a new set using a callable to determine which values to include

Description

public Ds\Set Ds\Set::filter ([ callable $callback ] )

Creates a new set using a callable to determine which values to include.

Parameters

callback

bool callback ( mixed $value )

Optional callable which returns TRUE if the value should be included, FALSE otherwise.

If a callback is not provided, only values which are TRUE (see converting to boolean) will be included.

Return Values

A new set containing all the values for which either the callback returned TRUE, or all values that convert to TRUE if a callback was not provided.

Examples

Example #1 Ds\Set::filter() example using callback function

<?php
$set 
= new \Ds\Set([12345]);

var_dump($set->filter(function($value) {
    return 
$value == 0;
}));
?>

The above example will output something similar to:

object(Ds\Set)#3 (2) {
  [0]=>
  int(2)
  [1]=>
  int(4)
}

Example #2 Ds\Set::filter() example without a callback function

<?php
$set 
= new \Ds\Set([01'a'truefalse]);

var_dump($set->filter());
?>

The above example will output something similar to:

object(Ds\Set)#2 (3) {
  [0]=>
  int(1)
  [1]=>
  string(1) "a"
  [2]=>
  bool(true)
}