HH\Vector::slice

Returns a subset of the current Vector starting from a given key up to, but not including, the element at the provided length from the starting key

public function slice(
  int $start,
  int $len,
): Vector<Tv>;

$start is 0-based. $len is 1-based. So slice(0, 2) would return the elements at keys 0 and 1.

The returned Vector will always be a subset (but not necessarily a proper subset) of the current Vector. If $start is greater than or equal to the length of the current Vector, the returned Vector will contain no elements. If $start + $len is greater than or equal to the length of the current Vector, the returned Vector will contain the elements from $start to the end of the current Vector.

If either $start or $len is negative, an exception is thrown.

Parameters

  • int $start - The starting key of the current Vector at which to begin the returned Vector.
  • int $len - The length of the returned Vector.

Return Values

  • Vector<Tv> - A Vector that is a subset of the current Vector starting at $start up to but not including the element $start + $len.