goodId = Object.keys(spec).find(key => spec[key] === specCur)
// 根据对象的value值获取key export const getFindKey = (value: any, obj: any, me: any) => { let objlist = JSON.parse(JSON.stringify(obj)) ; delete objlist.me; let findKey = (value: any, compare = (a:any, b:any) => a === b) =>{ return Object.keys(objlist).find(k =>...
function find(key){ return this.datastore[key]; } 1. 2. 3. 从字典中删除键值对需要使用Javascript中的一个内置函数,delete,这个函数是object类的一部分,使用对键的引用作为参数,该函数同时删掉和其关联的值。代码如下: function remove(key){ delete this.datastore[key]; } 1. 2. 3. 最后我们希望可以...
//激活前的提示 var act_before_tip = function (data) { //非空判断 if (Object.keys(data)...+ ""; for (var key in data) { a...
// 通过map的value找key(ps:obj是js中的map对象 value就是map中的value)functionfindKey(obj,value,compare=(a,b)=>a===b){returnObject.keys(obj).find(k=>compare(obj[k],value))} 值得注意的地方: 1、参数obj就是你的map对象,value就是你要查找key的对应value。
( "foo" ); symbol .keyfor(s2) // undefined 2.4、遍历 2.4.1一级对象遍历方法 总结:1、只有object.getownpropertysymbols(obj)和reflect.ownkeys(obj)可以拿到符号属性2.只有reflect.ownkeys(obj)可以拿到不可枚举属性 2.4.2、多级对象遍历 数据模型: var tre...
constitems =awaitthis.taskDao.find(querySpec); res.render("index", {title:"My ToDo List ",tasks: items }); }asyncaddTask(req, res) {constitem = req.body;awaitthis.taskDao.addItem(item); res.redirect("/"); }asynccompleteTask(req, res) {constcompletedTasks =Object.keys(req.body);...
this.taskDao.find(querySpec); res.render("index", { title: "My ToDo List ", tasks: items }); } async addTask(req, res) { const item = req.body; await this.taskDao.addItem(item); res.redirect("/"); } async completeTask(req, res) { const completedTasks = Object.keys(req.body...
When the ES module is loaded successfully by require(), the returned object will either be a ES module namespace object similar to what's returned by import(), or what gets exported as "module.exports" in the ES module. Users can check process.features.require_module to see whether ...
To get access to the contextified global object, suitable for use with the vm APIs, you can use the getInternalVMContext() method: const { Script } = require("vm"); const dom = new JSDOM(``, { runScripts: "outside-only" }); const script = new Script(` if (!this.ran) { th...