PHP | Ds\Sequence map() Function

The Ds\Sequence::map() function is an inbuilt function in PHP which returns the result after applying callback function to each value.

Syntax:

Ds\Sequence abstract public Ds\Sequence::map( $callback )

Parameter: This function accepts single parameter $callback. The callback apply on each value of sequence.

Return Value: This function returns the callback after applying on each value.

Below programs illustrate the Ds\Sequence::map() function in PHP:

Program 1:

Output:
object(Ds\Vector)#3 (4) {
  [0]=>
  int(12)
  [1]=>
  int(24)
  [2]=>
  int(36)
  [3]=>
  int(48)
}

Program 2:

Output:

object(Ds\Vector)#3 (4) {
  [0]=>
  int(4)
  [1]=>
  int(5)
  [2]=>
  int(6)
  [3]=>
  float(6.6666666666667)
}

Reference: http://php.net/manual/en/ds-sequence.map.php