recca0120 / lodash-php

     * @param int $fromIndex

     * @return int|string

     */

    public function indexOf($searchElement, $fromIndex = 0)

    {

        $result = array_search($searchElement, $this->getArrayCopy(), true);

        return $result === false ? -1 : $result + $fromIndex;

        // if ($fromIndex < 0) {

        //     $fromIndex = $this->length() + $fromIndex;

        // }

        // $result = array_search($searchElement, $this->slice($fromIndex)->getArrayCopy(), true);

        // return $result === false ? -1 : $result + $fromIndex;

    }

    /**

     * The join() method joins all elements of an array into a string.

     * @param int $fromIndex

     * @return int|string

     */

    public function lastIndexOf($searchElement, $fromIndex = 0)

    {

        $result = array_search($searchElement, array_reverse($this->getArrayCopy(), true));

        return $result === false ? -1 : $result;

        // $result = array_search($searchElement, array_reverse($this->slice($fromIndex)->getArrayCopy(), true));

        // return ($result === false) ? -1 : $result + $fromIndex;

    }

    /**

     * The map() method creates a new array with the results of calling a provided function on every element in this array.