* @returns {array}*/functionshuffle(array) { let m=array.length, t, i;//While there remain elements to shuffle…while(m) {//Pick a remaining element…i = Math.floor(Math.random() * m--);//And swap it with the current element.t =array[m]; array[m]=array[i]; array[i]=t; ...
const array = [1,2,3];const value1= array.join();//'1,2,3'const value2 = array.join('-');//'1-2-3' 6. toString和toLocaleString - 用于数组转字符串 const array = [1,2,3];const value1= array.toString();//'1,2,3'const value2 = array.toLocaleString();//'1,2,3' 7. ...
Int8Array(); Uint8Array(); Uint8ClampedArray(); Int16Array(); Uint16Array(); Int32Array(); Uint32Array(); Float32Array(); Float64Array(); 基本构成是"类型+位数+Array",U表示无符号,如Uint16Array()表示无符16位整数视图。用来读写简单类型的二进制数据。 (3)DataView可以自定义复合格式的视...
functionlog(element,index,array){console.log('['+index+'] = '+element);};[2,5,9].forEach(log);// [0] = 2 // [1] = 5 // [2] = 9 此外,forEach循环和map循环一样也可以用绑定回调函数内部的this变量,间接操作其它变量(参考上面的map()循环例子)。 7.filter()过滤循环 filter方法用于...
2)使用 new 关键字创建(构造函数) var arr = new Array(); 数组赋值: var arr = []; arr[0] = 123; arr[1] = '第三个发'; arr[2] = '命运交响曲' 1. 2. 3. 4. 数组方法 列举30个 1)改变原数组:shift 、pop、unshift、push、sort、reverse、splice ...
value1, value2, …, valueN 是要连接的数组或值。 用法示例: 1. 连接两个阵列: constarray1 = [1,2,3];constarray2 = [4,5,6];constconcatenatedArray = array1.concat(array2);console.log(concatenatedArray);// [1, 2, 3, 4, 5, ...
IsArray 获取一个布尔值,该值指示 JSValue 是否表示 JavaScript 数组。 IsBoolean 获取一个布尔值,该值指示 JSValue 是否表示 JavaScript 布尔值。 IsDate 获取一个布尔值,该值指示 JSValue 是否表示 JavaScript 日期。 IsDirectBinding 保留JavaScript 值并提供类型测试和转换函数。
Converts the JavaScript value to an array. functoDictionary() -> [AnyHashable:Any]! Converts the JavaScript value to a dictionary. functoPoint() ->CGPoint Converts the value to a point structure. functoRange() ->NSRange Converts the value to a range. ...
This includes things like window.Array, window.Promise, etc. It also, notably, includes window.eval, which allows running scripts, but with the jsdom window as the global: const dom = new JSDOM(` document.getElementById("content").append(document.createElement("hr")); `, { runScripts:...
const{Heap}=require('heap-js');// Get all tasks from the databaseconsttasks=db.collection.find().toArray();// The most important task has the lowest priority valueconstcustomPriorityComparator=(a,b)=>a.priority-b.priority;// Create the priority queueconstpriorityQueue=newHeap(customPriority...