方法一:使用 Array.isArray() 方法和 array.length 属性 可以通过 Array.isArray() 方法检查数组是否真的是一个数组,是否存在。如果作为参数传递的 Object 是数组,则此方法返回 true。如果数组未定义或为空,它还会检查大小写。 可以使用 array.length 属性检查数组是否为空。此属性返回数组中元素
console.log(checkBoolean(null)); //false console.log(checkBoolean(undefined)); //false console.log(checkBoolean(NaN)); //false console.log(checkBoolean(a));//true console.log(checkBoolean(c));//true javascript中有六种数据类型:string;boolean;Array;Object;null;undefined。如何检测这些数据类型呢...
this.hasOwnProperty(propName))continue;//Now the detail check and recursion//This returns the script back to the array comparing/**REQUIRES Array.equals**/if(this[propName]instanceofArray && object2[propName]instanceofArray) {//recurse into the nested arraysif(!this...
function unique(arr){ if(!isArrayLink(arr)){ //不是类数组对象 return arr } let result = [] let objarr = [] let obj = Object.create(null) arr.forEach(item => { if(isStatic(item)){ //是除了symbol外的原始数据 let key = item + '_' + getRawType(item); if(!obj[key]){ obj...
Fix lightShadowMatrix() if renderer.shadowMap.enabled is false. #31024 (@sunag) Fix .toVarying() analyze for optimization. #31090 (@sunag) Fix auto-cache if using multiple conditionals. #31076 (@sunag) Introduce namespace. #31168 (@sunag) Fix object-as-parameter checking for Fn()....
classProxySandBox{proxyWindow;isRunning=false;active(){this.isRunning=true;}inactive(){this.isRunning=false;}constructor(){constfakeWindow=Object.create(null);this.proxyWindow=newProxy(fakeWindow,{set:(target,prop,value,receiver)=>{if(this.isRunning){target[prop]=value;}},get:(target,prop,r...
Object3D.applyMatrix() now updates the local matrix if Object3D.matrixAutoUpdate is set to true.r102 → r103The npm script npm run editor was removed. The editor is now a Progressive Web App (PWA). The callback parameter of SVGLoader.onLoad() is now an object (data) containing the ro...
LenientVBArrayPrototype MathObject MemberInfoInitializer MemberInfoList MethodInvoker Missing Namespace NoContextException NotRecommended NumberConstructor NumberObject NumberPrototype NumericBinary NumericUnary ObjectConstructor ObjectPrototype Override Package
方法一：使用Ext.Object.toArray函数 Ext.Object.toArray是官方提供的工具函数，适合键值对结构的简单对象。执行时按对象键名的自然顺序生成数组，数组元素为对象的值。例如用户数据对象name:’李雷’,age: 28转换后得到[’李雷’,28]。此方法优势在于代码简洁，但需注意两点：转换后的数组元素顺序依赖对象键名排列；...
Type: Object The options that are applied to the XMLHttpRequest object, as follows: type: Optional. A string that specifies the HTTP method used to open the connection, such as GET, POST, or HEAD. This parameter is not case-sensitive. If the type is not specified, the default is GET”...