chu-utils/dist/utils.js

前端-自定义工具函数库

/*
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/***/ "./src/array/chunk.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"chunk\": () => (/* binding */ chunk)\n/* harmony export */ });\n// 数组分块：将数组拆分成多个 size 长度的区块\r\nfunction chunk(arr, size = 1) {\r\n  if(arr.length === 0) {\r\n    return []\r\n  }\r\n  let result = []\r\n  let temp = []\r\n  arr.forEach(item => {\r\n    if(temp.length === 0) {\r\n      result.push(temp)\r\n    }\r\n    temp.push(item)\r\n    if(temp.length === size) {\r\n      temp = []\r\n    }\r\n  })\r\n  return result\r\n}\n\n//# sourceURL=webpack://_/./src/array/chunk.js?");

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/***/ "./src/array/concat.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"concat\": () => (/* binding */ concat)\n/* harmony export */ });\n// 数组合并\r\nfunction concat(arr, ...args) {\r\n  let result = [...arr]\r\n  args.forEach(item => {\r\n    if(Array.isArray(item)) {\r\n      result.push(...item)\r\n    }else {\r\n      result.push(item)\r\n    }\r\n  })\r\n  return result\r\n}\n\n//# sourceURL=webpack://_/./src/array/concat.js?");

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/***/ "./src/array/difference.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"difference\": () => (/* binding */ difference)\n/* harmony export */ });\n// 获取arr1数组中有的元素，arr2数组里面没有的元素\r\nfunction difference(arr1, arr2 = []) {\r\n  if(arr1.length === 0) {\r\n    return []\r\n  }\r\n  if(arr2.length === 0) {\r\n    return [...arr1]\r\n  }\r\n  return arr1.filter(item => !arr2.includes(item))\r\n}\n\n//# sourceURL=webpack://_/./src/array/difference.js?");

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/***/ "./src/array/drop.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"drop\": () => (/* binding */ drop)\n/* harmony export */ });\n// 得到当前数组过滤掉左边count个后剩余元素组成的数组\r\nfunction drop(arr, count = 1) {\r\n  return arr.filter((item, index) => {\r\n    return index >= count\r\n  })\r\n}\n\n//# sourceURL=webpack://_/./src/array/drop.js?");

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/***/ "./src/array/dropRight.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"dropRight\": () => (/* binding */ dropRight)\n/* harmony export */ });\n// 得到当前数组过滤掉右边count个后剩余元素组成的数组\r\nfunction dropRight(arr, count = 1) {\r\n  return arr.filter((item, index) => {\r\n    return index < arr.length - count\r\n  })    \r\n}\n\n//# sourceURL=webpack://_/./src/array/dropRight.js?");

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/***/ "./src/array/every.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"every\": () => (/* binding */ every)\n/* harmony export */ });\nfunction every(arr, callback) {\r\n  for(let i = 0; i < arr.length; i++) {\r\n    let res = callback(arr[i], i)\r\n    if(!res) {\r\n      return false\r\n    }\r\n  }\r\n  return true\r\n}\n\n//# sourceURL=webpack://_/./src/array/every.js?");

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/***/ "./src/array/filter.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"filter\": () => (/* binding */ filter)\n/* harmony export */ });\nfunction filter(arr, callback) {\r\n  let result = []\r\n  for(let i = 0; i < arr.length; i++) {\r\n    let res = callback(arr[i], i)\r\n    if(res) {\r\n      result.push(arr[i])\r\n    }\r\n  }\r\n  return result\r\n}\n\n//# sourceURL=webpack://_/./src/array/filter.js?");

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/***/ "./src/array/find.js":
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/***/ "./src/array/findIndex.js":
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/***/ "./src/array/flatten.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"flatten1\": () => (/* binding */ flatten1),\n/* harmony export */   \"flatten2\": () => (/* binding */ flatten2),\n/* harmony export */   \"flatten3\": () => (/* binding */ flatten3)\n/* harmony export */ });\n// 数组深度扁平化\r\n// 递归 + concat\r\nfunction flatten1(arr) {\r\n  let result = []\r\n  // 遍历数组\r\n  arr.forEach(item => {\r\n    if(Array.isArray(item)) {\r\n      // 递归调用\r\n      result = result.concat(flatten1(item))\r\n    }else {\r\n      result = result.concat(item)\r\n    }\r\n  })\r\n  return result\r\n}\r\n\r\n// ... + some + concat\r\nfunction flatten2(arr) {\r\n  // arr: [1, 2, [3, 4], [5, 6, [7, 8]]]\r\n  // [].concat(1, 2, [3, 4], [5, 6, [7, 8]])\r\n  // result初始值：[1, 2, 3, 4, 5, 6, [7, 8]]\r\n  let result = [].concat(...arr)\r\n  while(result.some(item => Array.isArray(item))) {\r\n    result = [].concat(...result)\r\n  }\r\n  return result\r\n}\r\n\r\n// 递归 + some + concat\r\nfunction flatten3(arr) {\r\n  return arr.reduce((result, item) => {\r\n    if(Array.isArray(item)) {\r\n      return result.concat(flatten3(item))\r\n    }else {\r\n      return result.concat(item)\r\n    }\r\n  }, [])\r\n}\n\n//# sourceURL=webpack://_/./src/array/flatten.js?");

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/***/ "./src/array/map.js":
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/***/ "./src/array/pull.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"pull\": () => (/* binding */ pull)\n/* harmony export */ });\n// 删除数组中的元素，会改变原数组，返回被删除的元素\r\nfunction pull(arr, ...args) {\r\n  // 保存删除的元素\r\n  let result = []\r\n  for(let i = 0; i < arr.length; i++) {\r\n    if(args.includes(arr[i])) {\r\n      // 保存元素\r\n      result.push(arr[i])\r\n      // 删除元素\r\n      arr.splice(i, 1)\r\n      // 下标自减\r\n      i--\r\n    }\r\n  }\r\n  return result\r\n}\n\n//# sourceURL=webpack://_/./src/array/pull.js?");

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/***/ "./src/array/pullAll.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"pullAll\": () => (/* binding */ pullAll)\n/* harmony export */ });\n// 删除数组中的元素(删除的元素放在数组里面)，会改变原数组，返回被删除的元素\r\nfunction pullAll(arr, args) {\r\n  // 保存删除的元素\r\n  let result = []\r\n  for(let i = 0; i < arr.length; i++) {\r\n    if(args.includes(arr[i])) {\r\n      // 保存元素\r\n      result.push(arr[i])\r\n      // 删除元素\r\n      arr.splice(i, 1)\r\n      // 下标自减\r\n      i--\r\n    }\r\n  }\r\n  return result\r\n}\n\n//# sourceURL=webpack://_/./src/array/pullAll.js?");

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/***/ "./src/array/reduce.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"reduce\": () => (/* binding */ reduce)\n/* harmony export */ });\nfunction reduce(arr, callback, initValue) {\r\n  let result = initValue\r\n  for(let i = 0; i < arr.length; i++) {\r\n    result = callback(result, arr[i], i)\r\n  }\r\n  return result\r\n}\n\n//# sourceURL=webpack://_/./src/array/reduce.js?");

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/***/ "./src/array/slice.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"slice\": () => (/* binding */ slice)\n/* harmony export */ });\n// 数组切片\r\nfunction slice(arr, start, end) {\r\n  let result = []\r\n  // 若arr数组长度为0\r\n  if(!arr.length) {\r\n    return []\r\n  }\r\n  // start临界条件\r\n  start = start || 0\r\n  if(start >= arr.length) {\r\n    return []\r\n  }\r\n  // end临界条件\r\n  end = end || arr.length\r\n  if(end < start) {\r\n    end = arr.length\r\n  }\r\n  \r\n  for(let i = start; i < end; i++) {\r\n    result.push(arr[i])\r\n  }\r\n  return result\r\n}\n\n//# sourceURL=webpack://_/./src/array/slice.js?");

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/***/ "./src/array/some.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"some\": () => (/* binding */ some)\n/* harmony export */ });\nfunction some(arr, callback) {\r\n  for(let i = 0; i < arr.length; i++) {\r\n    let res = callback(arr[i], i)\r\n    if(res) {\r\n      return true\r\n    }\r\n  }\r\n  return false\r\n}\n\n//# sourceURL=webpack://_/./src/array/some.js?");

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/***/ "./src/array/unique.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"unique1\": () => (/* binding */ unique1),\n/* harmony export */   \"unique2\": () => (/* binding */ unique2),\n/* harmony export */   \"unique3\": () => (/* binding */ unique3)\n/* harmony export */ });\n// 数组去重\r\nfunction unique1(arr) {\r\n  let result = []\r\n  arr.forEach(item => {\r\n    if(result.indexOf(item) === -1) {\r\n      result.push(item)\r\n    }\r\n  })\r\n  return result\r\n}\r\n\r\nfunction unique2(arr) {\r\n  let result = []\r\n  let obj = {}\r\n  arr.forEach(item => {\r\n    // 将item作为下标存储到对象里面\r\n    if(!obj[item]) {\r\n      obj[item] = true\r\n      result.push(item)\r\n    }\r\n  })\r\n  return result\r\n}\r\n\r\nfunction unique3(arr) {\r\n  let set = new Set(arr)\r\n  // 下面两种方法都是ok的\r\n  // return Array.from(set)\r\n  return [...set]\r\n}\n\n//# sourceURL=webpack://_/./src/array/unique.js?");

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/***/ }),

/***/ "./src/event-bind/addEventListener.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"addEventListener\": () => (/* binding */ addEventListener)\n/* harmony export */ });\n/* \r\n  语法：addEventListener(element, type, fn, selector)\r\n  说明：如果selector没有，直接给element绑定事件，\r\n    如果selector有，将selector对应的多个元素的事件委托绑定给父元素element\r\n***/\r\n// element是父元素，selector是子元素\r\nfunction addEventListener(element, type, fn, selector) {\r\n  if(typeof element === \"string\") {\r\n    element = document.querySelector(element)\r\n  }\r\n  // 如果没有指定selector, 普通的事件绑定\r\n  if(!selector) {\r\n      element.addEventListener(type, fn)\r\n  }else {\r\n    // 否则是代委托的事件绑定\r\n    element.addEventListener(type, function (event) {\r\n      // 得到真正发生事件的目标元素\r\n      const target = event.target\r\n      // 如果与选择器匹配\r\n      if(target.matches(selector)) {\r\n        // 调用处理事件的回调fn, 并指定this为目标元素, 参数为event\r\n        fn.call(target, event)\r\n      }\r\n    })\r\n  }\r\n}\n\n//# sourceURL=webpack://_/./src/event-bind/addEventListener.js?");

/***/ }),

/***/ "./src/event-bus/eventBus.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"default\": () => (__WEBPACK_DEFAULT_EXPORT__)\n/* harmony export */ });\n// 事件总线\r\n// 收集回调函数的数据格式如下：\r\n/* \r\n  {\r\n     add:  [callback1, callback2]\r\n     delete: [callback3]\r\n  }\r\n*/ \r\nclass EventBus {\r\n  constructor() {\r\n    this.callbacks = {}\r\n  }\r\n\r\n  // on方法：绑定事件\r\n  on(type, callback) {\r\n    if(this.callbacks[type]) {\r\n      this.callbacks[type].push(callback)\r\n    }else {\r\n      this.callbacks[type] = [callback]\r\n    }\r\n  }\r\n  \r\n  // emit方法：触发事件\r\n  emit(type, data) {\r\n    const callbacks = this.callbacks[type]\r\n    if(callbacks && callbacks.length) {\r\n      // 遍历\r\n      callbacks.forEach(callback => {\r\n        callback(data)\r\n      })\r\n    }\r\n  }\r\n\r\n  // off方法：移除事件\r\n  // 传入了事件名，就删掉eventName对应的回调\r\n  // 没传入事件名，就删除所有的回调\r\n  off(eventName, callback) {\r\n    if(eventName) {\r\n      delete this.callbacks[eventName]\r\n    }else {\r\n      this.callbacks = {}\r\n    }\r\n  }\r\n}\r\n\r\n/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (EventBus);\n\n//# sourceURL=webpack://_/./src/event-bus/eventBus.js?");

/***/ }),

/***/ "./src/extend/extend.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"extend\": () => (/* binding */ extend)\n/* harmony export */ });\n// 组合寄生式继承\r\nfunction create(proto) {\r\n  function Fn() { }\r\n  Fn.prototype = proto\r\n  return new Fn()\r\n}\r\n\r\nfunction extend(Child, Parent) {\r\n  Child.prototype = create(Parent.prototype)\r\n  Child.prototype.constructor = Child\r\n}\n\n//# sourceURL=webpack://_/./src/extend/extend.js?");

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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"debounce\": () => (/* binding */ debounce)\n/* harmony export */ });\nfunction debounce(callback, delay) {\r\n  let timer = null\r\n  // 返回一个函数\r\n  return function(...args) {\r\n    // 清除定时器\r\n    if(timer !== null) clearTimeout(timer)\r\n    // 启动定时器\r\n    timer = setTimeout(() => {\r\n      // 执行回调函数\r\n      callback.call(this, args)\r\n      // 重置定时器变量\r\n      timer = null\r\n    }, delay)\r\n  }\r\n}\n\n//# sourceURL=webpack://_/./src/function/debounce.js?");

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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"throttle\": () => (/* binding */ throttle)\n/* harmony export */ });\nfunction throttle(callback, wait) {\r\n  // 定义开始时间\r\n  let start = 0\r\n  // 结果是一个返回函数\r\n  return function(...args) {\r\n    // 定义结束时间\r\n    let current = Date.now()\r\n    if(current - start >= wait) {\r\n      callback.apply(this, args)\r\n      start = current\r\n    }\r\n  }\r\n}\n\n//# sourceURL=webpack://_/./src/function/throttle.js?");

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/***/ "./src/object/clone.js":
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/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"clone1\": () => (/* binding */ clone1),\n/* harmony export */   \"clone2\": () => (/* binding */ clone2)\n/* harmony export */ });\nfunction clone1(target) {\r\n  if(Array.isArray(target)) {\r\n    return [...target]\r\n  }else if(target !== null && typeof target === \"object\") {\r\n    return {...target}\r\n  }else {\r\n    return target\r\n  }\r\n}\r\n\r\nfunction clone2(target) {\r\n  if(target !== null && typeof target === \"object\") {\r\n    let result = Array.isArray(target) ? [] : {}\r\n    for(let key in target) {\r\n      // 判断当前对象身上是否有该属性\r\n      if(target.hasOwnProperty(key)) {\r\n        result[key] = target[key]\r\n      }\r\n    }\r\n    return result\r\n  }else {\r\n    return target\r\n  }\r\n}\n\n//# sourceURL=webpack://_/./src/object/clone.js?");

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/***/ }),

/***/ "./src/object/mergeObject.js":
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eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"myInstanceOf\": () => (/* binding */ myInstanceOf)\n/* harmony export */ });\n// 检测一个对象是否为函数的实例\r\nfunction myInstanceOf(obj, Fn) {\r\n  // 获取obj的隐式原型对象\r\n  let proto = obj.__proto__\r\n  // 遍历原型链\r\n  while(proto) {\r\n    if(Fn.prototype === proto) {\r\n      return true\r\n    }\r\n    proto = proto.__proto__\r\n  }\r\n  return false\r\n}\n\n//# sourceURL=webpack://_/./src/object/myInstanceOf.js?");

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/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"default\": () => (__WEBPACK_DEFAULT_EXPORT__)\n/* harmony export */ });\n// 消息发布与订阅: 可以实现对单个消息的取消(事件总线不可以)\r\n// 收集的数据类型格式\r\n/* \r\n  {\r\n    add: {\r\n      token1: callback1, \r\n      token2: callback2\r\n    },\r\n    update: {\r\n      token3: callback3\r\n    }\r\n  }\r\n*/\r\nclass PubSub {\r\n  // 保存所有回调的容器\r\n  static callbacks = {}\r\n  // 用于生成token的标记(为每个订阅提供一个唯一的编号)\r\n  // 通过这个唯一的编号，可以实现对单个消息的取消\r\n  static id = 1\r\n\r\n  // 订阅消息\r\n  static subscribe(channel, callback) {\r\n    // 创建唯一的编号\r\n    let token = \"token_\" + this.id++\r\n    if(this.callbacks[channel]) {\r\n      this.callbacks[channel][token] = callback\r\n    }else {\r\n      this.callbacks[channel] = {\r\n        [token]: callback\r\n      }\r\n    }\r\n    // 返回token (返回唯一标识，为后面取消订阅做准备)\r\n    return token\r\n  }\r\n\r\n  // 发布异步的消息\r\n  static publish(channel, data) {\r\n    // 取出当前消息对应的callbacks\r\n    let callbacks = this.callbacks[channel]\r\n    // 如果有值\r\n    if (callbacks) {\r\n      // 启动定时器, 异步执行所有的回调函数\r\n      setTimeout(() => {\r\n        // 取出对象里面所有的value，这个value就是传入的回调函数\r\n        Object.values(callbacks).forEach(callback => {\r\n          callback(data)\r\n        })\r\n      }, 0)\r\n    }\r\n  }\r\n\r\n  // 发布同步的消息\r\n  static publishSync(channel, data) {\r\n    // 取出当前消息对应的callbacks\r\n    const callbacks = this.callbacks[channel]\r\n    // 如果有值\r\n    if (callbacks) {\r\n      // 立即同步执行所有的回调函数\r\n      Object.values(callbacks).forEach(callback => {\r\n        callback(data)\r\n      })\r\n    }\r\n  }\r\n\r\n  /* 取消消息订阅\r\n   1). 没有传值，flag为undefined，取消所有订阅\r\n   2). flag为token字符串(回调函数唯一标识)，取消token这个订阅\r\n   3). flag为channel字符串(消息名)，取消channel消息下面所有订阅\r\n  ***/\r\n  static unsubscribe(flag) {\r\n    // 如果flag为undefined，清空所有订阅\r\n    if(flag === undefined) {\r\n      this.callbacks = {}\r\n    }else if(typeof flag === \"string\") {\r\n      // 判断是否为token_开头\r\n      if(flag.indexOf(\"token_\") === 0) {\r\n        // 获取用于flag唯一标识的那个对象\r\n        let callbackObj = Object.values(this.callbacks).find(obj => {\r\n          return obj.hasOwnProperty(flag)\r\n        })\r\n        // 删除订阅的消息\r\n        if(callbackObj) {\r\n          delete callbackObj[flag]\r\n        }\r\n      }else {\r\n        delete this.callbacks[flag]\r\n      }\r\n    }\r\n  }\r\n}\r\n\r\n/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (PubSub);\n\n//# sourceURL=webpack://_/./src/pub-sub/pub-sub.js?");

/***/ }),

/***/ "./src/string/palindrome.js":
/*!**********************************!*\
  !*** ./src/string/palindrome.js ***!
  \**********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"palindrome\": () => (/* binding */ palindrome)\n/* harmony export */ });\n// 功能: 如果给定的字符串是回文，则返回 true ；否则返回 false\r\nfunction palindrome(str) {\r\n  let reverseStr = str.split(\"\").reverse().join(\"\")\r\n  if(reverseStr === str) {\r\n    return true\r\n  }else {\r\n    return false\r\n  }\r\n}\n\n//# sourceURL=webpack://_/./src/string/palindrome.js?");

/***/ }),

/***/ "./src/string/reverseString.js":
/*!*************************************!*\
  !*** ./src/string/reverseString.js ***!
  \*************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"reverseString\": () => (/* binding */ reverseString)\n/* harmony export */ });\n// 功能: 生成一个倒序的字符串\r\nfunction reverseString(str) {\r\n  // 将字符串变成数组\r\n  // let arr = [...str]\r\n  let arr = str.split(\"\")\r\n  // 翻转数组\r\n  arr.reverse()\r\n  // 将数组拼接成字符串并返回\r\n  return arr.join(\"\")\r\n}\n\n//# sourceURL=webpack://_/./src/string/reverseString.js?");

/***/ }),

/***/ "./src/string/truncate.js":
/*!********************************!*\
  !*** ./src/string/truncate.js ***!
  \********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */   \"truncate\": () => (/* binding */ truncate)\n/* harmony export */ });\n// 功能: 如果字符串的长度超过了num, 截取前面num长度部分, 并以...结束\r\nfunction truncate(str, size) {\r\n  return str.length > size ? str.slice(0, size) + \"...\" : str\r\n}\n\n//# sourceURL=webpack://_/./src/string/truncate.js?");

/***/ })

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