Function first

lib/web/jshint.js:6430–6432

* Gets the first element of `array`. * * @static * @memberOf _ * @alias head * @category Array * @param {Array} array The array to query. * @returns {*} Returns the first element of `array`. * @example * * _.first([1, 2, 3]); * // => 1 *

(array)

     * // => undefined
     */
    function first(array) {
      return array ? array[0] : undefined;
    }

    /**
     * Flattens a nested array. If `isDeep` is `true` the array is recursively