HH\Set::contains

Determines if the specified value is in the current Set

Description

public function contains<Tu super Tv>(
  Tu $v,
): bool

Parameters

  • $v - The value to check.

Return Values

  • bool - true if the specified value is present in the current Set; false otherwise.

Examples

<?hh

namespace Hack\UserDocumentation\API\Examples\Set\Contains;

$s = Set {'red', 'green', 'blue', 'yellow'};

// Prints "true", since $s contains "red"
var_dump($s->contains('red'));

// Prints "false", since $s doesn't contain "blurple"
var_dump($s->contains('blurple'));
Output
bool(true)
bool(false)