Method pop

javascript/08_stack/StackBasedOnLinkedList.js:27–34

()

        }
    }
    pop() {
        if (this.top === null) {
            return -1
        }
        const value = this.top.element
        this.top = this.top.next
        return value
    }
    // 为了实现浏览器前进后退
    clear() {
        this.top = null