import defaultValue from '../../Core/defaultValue.js'

    /**
     * Adds an element to an array and returns the element's index.
     *
     * @param {Array} array The array to add to.
     * @param {Object} element The element to add.
     * @param {Boolean} [checkDuplicates=false] When <code>true</code>, if a duplicate element is found its index is returned and <code>element</code> is not added to the array.
     *
     * @private
     */
    function addToArray(array, element, checkDuplicates) {
        checkDuplicates = defaultValue(checkDuplicates, false);
        if (checkDuplicates) {
            var index = array.indexOf(element);
            if (index > -1) {
                return index;
            }
        }

        array.push(element);
        return array.length - 1;
    }

    export default addToArray;