HH\Lib\C\contains
Returns true if the given Traversable contains the value
namespace HH\Lib\C;
function contains<T1, T2>(
Traversable<T1> $traversable,
T2 $value,
): bool;
Strict equality is used.
Time complexity: O(n) (O(1) for keysets) Space complexity: O(1)
Parameters
Traversable<T1>$traversableT2 $value
Returns
bool
Examples
$strings = vec["a", "b", "c", "d"];
$contains_result_1 = C\contains($strings, "a");
echo "First contains result: $contains_result_1\n";
//Output: First contains result: true
$contains_result_2 = C\contains($strings, "z");
echo "Second contains result: $contains_result_2\n";
//Output: Second contains result: false
$empty_strings = vec[];
$contains_result_3 = C\contains($empty_strings, "a");
echo "Third contains result: $contains_result_3\n";
//Output: Third contains result: false