HH\ImmVector::map

Returns an ImmVector containing the results of applying an operation to each value in the current ImmVector

public function map<Tu>(
  (function(Tv): Tu) $callback,
): ImmVector<Tu>;

map()'s result contains a value for every value in the current ImmVector; unlike filter(), where only values that meet a certain criterion are included in the resulting ImmVector.

Guide

• Examples

Parameters

• (function(Tv): Tu) $callback

Returns

• ImmVector<Tu> - An ImmVector containing the results of applying a user-specified operation to each value of the current ImmVector in turn.

Examples

See [Vector::map](</hack/reference/class/Vector/map/#examples>) for usage examples.