add: function (a) {
            var b;
            for (a.concat || (a = Array.prototype.slice.call(a)), this.list.concat || (this.list = Array.prototype.slice.call(this.list)), this.list = this.list.concat(a), this.num = this.list.length, this.num > 2 && null === this.options.continuous && (this.options.continuous = !0, this.container.removeClass(this.options.leftEdgeClass)), this.container.removeClass(this.options.rightEdgeClass).removeClass(this.options.singleClass), b = this.num - a.length; b < this.num; b += 1)this.addSlide(b), this.positionSlide(b);
            this.positions.length = this.num, this.initSlides(!0)
        },