# js实现单向链表
实现一个类LinkList,实现一些基本的方法:
- find 查找某个节点
- findPrev 查找上一个节点
- insert 插入一个节点
- delete 删除一个节点
class LinkList {
  constructor() {
    this.head = null
  }
  find(value) {
    let curNode = this.head
    while (curNode.value !== value) {
      curNode = curNode.next
    }
    return curNode
  }
  findPrev(value) {
    let curNode = this.head
    while (curNode.next!==null && curNode.next.value !== value) {
      curNode = curNode.next
    }
    return curNode
  }
  insert(newValue, value) {
    const newNode = new Node(newValue)
    const curNode = this.find(value)
    newNode.next = curNode.next
    curNode.next = newNode
  }
  delete(value) {
    const preNode = this.findPrev(value)
    const curNode = preNode.next
    preNode.next = preNode.next.next
    return curNode
  }
}
class Node {
  constructor(value, next) {
    this.value = value
    this.next = null
  }
}