javascript遍历json对象的key和任意js对象属性实例

使用 keys 方法获取该对象的属性和方法： function Pasta(grain, width, shape) { this.grain = grain; this.width = width; this.shape = shape; this.toString = function () { return (this.grain + ", " + this.width + ", " + this.shape); } } var spaghetti = new