name:'前端代码女神'}varkeys=Object.keys(obj)keys.forEach((key)=>{console.log(key)// job nameconsole.log(obj[key])// web worker 前端代码女神})
总结:区别1:Object.keys()有返回值,且返回值为 实例对象的所有属性名组成的数组 区别2:for in 遍历包含原型链上的属性,而 Object.keys() 只会遍历 实例对象本身的所有属性!
vartarget =myObject;varenum_and_nonenum =Object.getOwnPropertyNames(target);varenum_only =Object.keys(target);varnonenum_only =enum_and_nonenum.filter(function(key) {varindexInEnum =enum_only.indexOf(key);if(indexInEnum == -1) {//not found in enum_only keys mean the key is non-enumera...
Generating public/private ecdsa key pair. Enter file in which to save the key (C:\Users\username/.ssh/id_ecdsa): At the prompt, you can selectEnterto accept the default file path, or you can specify a path or file name for your generated keys. ...
The tables below list the standard values for the KeyboardEvent.key property, with an explanation of what the key is typically used for. Corresponding virtual keycodes for common platforms are included where available.
for…in 循环又可以用于遍历对象的可枚举属性 ; 代码示例 : var person = { name: "Tom", age: 18, hello: function() { return + " is " + this.age + " years old"; } }; // 使用 for…in 循环 遍历对象 for (let key in person) { ...
ECMAScript将对象的属性分为两种:数据属性和访问器属性。每一种属性内部都有一些特性,这里我们只关注对象属性的[[Enumerable]]特征,它表示是否通过 for-in 循环返回属性,也可以理解为:是否可枚举。 然后根据具体的上下文环境的不同,我们又可以将属性分为:原型属性和实例属性。原型属性是定义在对象的原型(prototype)中...
ProgramData\ssh\administrators_authorized_keys -Value '''$authorizedKey''';icacls.exe ""$env:ProgramData\ssh\administrators_authorized_keys"" /inheritance:r /grant ""Administrators:F"" /grant ""SYSTEM:F"""# Connect to your server and run the PowerShell using the $remotePowerShell variablessh ...
The Zenmuse X7 is a professional aerial camera that is compatible with the Inspire 2. Videos recorded by the Zenmuse X7 are processed by the CineCore 2.1 Image Processing System. A DJI Inspire 2 License Key unlocks CinemaDNG and/or Apple ProRes processing capabilities for CineCore 2.1. These fil...
在JavaScript中,for…in和for…of都是用来遍历集合的循环控制结构,但它们之间存在一些重要的区别: 用途不同: for…in循环用于遍历对象的属性。 for…of循环用于遍历可迭代对象(如数组,字符串,Set,Map等)的值。 遍历的内容不同: for…in会遍历对象所有的可枚举属性,包括原型链上的属性。 for…of遍历的是可迭代...