(PECL ds >= 1.0.0)
Ds\Vector::find — Attempts to find a value's index
    Returns the index of the value, or false if not found.
  
valueThe value to find.
    The index of the value, or false if not found.
  
Note:
Values will be compared by value and by type.
Exemple #1 Ds\Vector::find() example
<?php
$vector = new \Ds\Vector(["a", 1, true]);
var_dump($vector->find("a")); // 0
var_dump($vector->find("b")); // false
var_dump($vector->find("1")); // false
var_dump($vector->find(1));   // 1
?>
Résultat de l'exemple ci-dessus est similaire à :
int(0) bool(false) bool(false) int(1)