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AI代码解释 var__metadata=(this&&this.__metadata)||function(k,v){if(typeofReflect==='object'&&typeofReflect.metadata==='function')returnReflect.metadata(k,v)}// 省略部分代码__decorate([d,__metadata('design:type',Object)],Foo.prototype,'member',void0)__decorate([d,__metadata('design:...
=null&&//must be defined and non-nullthat.constructor === Complex &&//and an instance of Complexthis.r === that.r &&this.i === that.i;//and have the same values.};/*类字段*///Here are some class fields that hold useful predefined complex numbers...
以下 URL 是用于触发此查询的 REST GET 请求 URL:sampleserver3.arcgisonline.com/ArcGIS/rest/services/BloomfieldHillsMichigan/Parcels/MapServer/0/query?text=&geometry=&geometryType=esriGeometryPoint&inSR=&spatialRel=esriSpatialRelIntersects&relationParam=&objectIds=&where=1%3D1&time=&returnIdsOnly=false&...
if (typeof heart ==='function') { this.heart =heart({ weight:this.weight, height:this.height }) } else { this.heart = heart } returnthis } validate() { constrequiredFields= ['name', 'gender', 'eyes', 'legs', 'scent', 'tongue', 'heart'] ...
1)通过Object.getPrototypeOf(obj) 间接访问指定对象的 prototype 对象。 2)通过Object.setPrototypeOf(obj, anotherObj) 间接设置指定对象的 prototype 对象。 3)部分浏览器提前开了 __proto__ 的口子,使得可以通过 obj.__proto__ 直接访问原型,通过 obj.__proto__ = anotherObj 直接设置原型。
Fields are part of the instance object. Accessors are part of the object's prototype.(fields 是对象实例的一部分,而 accessors 是对象原型的一部分。) 进而得出: So fields are hit before methods/accessors. (fields 总是比 methods/accessors 先...
It’s all about context. The reason you get that error is because, when you invokesetTimeout(), you are actually invokingwindow.setTimeout(). As a result, the anonymous function being passed tosetTimeout()is being defined in the context of thewindowobject, which has noclearBoard()method...
fieldName in objectName 例如,下面将静态方法hasRadius()添加到Circle类,它使用in运算符检查circle对象是否存在私有字段#radius: class Circle { #radius = 0; constructor(radius) { this.radius = radius; } get area() { return Math.PI * Math.pow(this.radius, 2); ...
var Dingding = { params: {}, proxy: null, setParams: function (params) { if (typeof params !== 'object') { return; } Dingding.params = params; }, request: function () { var data = { msgtype: "markdown", markdown: { title: "报警", text: "## 通知:\n " + Dingding.param...