Ds\Set::map

Returns the result of applying a callback to each value

&reftitle.description; public `Ds\Set` `Ds\Set::map` `callable` `callback`

Returns the result of applying a `callback` function to each value in the set.

&reftitle.parameters;

`callback`

- The callback to apply to each value in the set must have the following signature: `mixed` ``callback`` `mixed` `value`

&reftitle.returnvalues;

Returns a new `Ds\Set` instance where each value is the result of applying the `callback` to each value of the set.

&reftitle.examples;

### `Ds\Set::map` example

    <?php
    $set = new \Ds\Set([1, 2, 3]);

    var_dump($set->map(function($value) { return $value * 2; }));
    var_dump($set);
    ?>

&example.outputs.similar;

    object(Ds\Set)#3 (3) {
      [0]=>
      int(2)
      [1]=>
      int(4)
      [2]=>
      int(6)
    }
    object(Ds\Set)#1 (3) {
      [0]=>
      int(1)
      [1]=>
      int(2)
      [2]=>
      int(3)
    }