第37题(2019-09-10)：写一个单向链数据结构的 js 实现并标注复杂度

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详解

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
  }
}