HH\Map::slice

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

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

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

The returned Map will always be a proper subset of the current Map.

Parameters

  • int $start - The starting key location of the current Map for the returned Map.
  • int $len - The length of the returned Map.

Return Values

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