Function remove

vue.js:174–181

* Remove an item from an array * //删除数组

(arr, item)

     *    //删除数组
     */
    function remove(arr, item) {
        if (arr.length) {
            var index = arr.indexOf(item);
            if (index > -1) {
                return arr.splice(index, 1)
            }
        }
    }

    /**
     * Check whether the object has the property.