<?php
$deque = new \Ds\Deque(["a", 1, true]);
var_dump($deque->find("a")); // 0
var_dump($deque->find("b")); // false
var_dump($deque->find("1")); // false
var_dump($deque->find(1)); // 1
?>
The above example will output
something similar to:
int(0)
bool(false)
bool(false)
int(1)