Object.values(obj); // [1, 2] 四、Object.getOwnPropertyDescriptors 4.1 返回值 Object.getOwnPropertyDescriptors() 方法用来获取一个对象的所有自身属性的描述符 4.2 语法 Object.getOwnPropertyDescriptors(obj); 4.3 例子 let obj = {a: 1, b: 2}; Object.getOwnPropertyDescriptors(obj); // [a: ...
The Object.prototype property represents the Object prototype object. 这个属性表示了Object这个构造函数的原型对象。 Object.getOwnPropertyDescriptor() Object.getOwnPropertyDescriptor(obj, prop)The Object.getOwnPropertyDescriptor() method returns a property descriptor(返回的是一个对象) for an own property...
if (*new_capacity <= JSObject::kMaxUncheckedOldFastElementsLength || (*new_capacity <= JSObject::kMaxUncheckedFastElementsLength && ObjectInYoungGeneration(object))) { return false; } return ShouldConvertToSlowElements(object.GetFastElementsUsage(), *new_capacity); } 当慢数组的元素可存放在快数...
functiondeepClone(obj) {varcopy;// 如果 obj 是 null、undefined 或 不是对象,直接返回 obj// Handle the 3 simple types, and null or undefinedif(null== obj ||"object"!=typeofobj)returnobj;// Handle Dateif(objinstanceofDate) { copy =newDate(); copy.setTime(obj.getTime());returncopy;...
var array23=[...map1.values()]; //['a','b']; console.log(array21,array22,array23); //3、对象转成map var user={name:"mark",height:195}; console.log(Object.entries(user)); //[["name", "mark"],["height", 195]]
options(Object):语句执行的选项,为 JS 对象。可配置属性具体如下: callback(Function):执行完 executeMany 后的回调函数。参数如下: 下面通过一个简单的例子来说明 executeMany 用法。 conn.executeMany( "insert into PERSON values(:1, :2, :3)",
Object.values({name:'Max',age:4});// ['max', 4] 支持Array.prototype.includes() [10,20,NaN].includes(20);// true 支持BigInt typeof567n==='bigint';// true 支持模板字符串 `Lucky number:${(Math.random()*100).toFixed(0)}` ...
put object with streaming: no chunked encoding, we use multipart upload instead get object to local file: we cannot manipulate file system in browser, we provide signed object url for downloading needs bucket operations(listBuckets, putBucketLogging, etc) will fail: OSS server currently do not ...
getJSON('//example.com/awesome.json?callback=?', function(remoteData){ console.log(remoteData) }) $.param $.param(object, [shallow]) ⇒ string $.param(array) ⇒ string 序列化一个对象,在Ajax请求中提交的数据使用URL编码的查询字符串表示形式。如果shallow设置为true。嵌套对象不会被序列化...
All of the preceding functions have a parameter whose type is object. In addition to the data returned by each API, another common property named errMsg is returned. The value format of this property is as follows: For a successful call:xxx:ok, where xxx is the name of the API being ca...