{Object.keys(raptors).map(key=>( <likey={key}>{raptors[key].name}</li> ))} </ul> ); } Mapping Values The second approach usesObject.values, which when passed an object will return you an array containing the va
An iterable can be iterated over with the code:for (const x of iterable) { } Example // Create an Object myNumbers = {}; // Make it Iterable myNumbers[Symbol.iterator] =function() { letn =0; done =false; return{ next() { ...
};vardecaf =function(){this.name='decaf';this.basePrice=6; };// create object literals for the different sizesvarsmall = {getPrice:function(){returnthis.basePrice+2},getLabel:function(){returnthis.name+' small'} };varmedium = {getPrice:function(){returnthis.basePrice+4},getLabel:functi...
//映射对象集合到特定的属性名称的生成器。function*iteratePropertyValues(collection, property) {for(letobjectofcollection) {yieldobject[property]; } }//生成给定对象的每个值的生成器。function*iterateObjectValues(collection) {for(letkeyofObject.keys(collection)) {yieldcollection[key]; } }//生成给定数组...
function* iterateObjectValues(collection) { for (let key of Object.keys(collection)) { yield collection[key]; } } //生成给定数组中每个项的生成器。 function* iterateArrayElements(collection) { for (let element of collection) { yield element; } } 这些函数简洁小巧,易于使用。麻烦的是这些函数...
JavaScript 语言是在 1994 年创建的,旨在使 Web 浏览器显示的文档具有动态行为。自那时以来,该语言已经发生了显著的演变,与此同时,Web 平台的范围和功能也迅速增长。今天,JavaScript 程序员可以将 Web 视为一个功能齐全的应用程序开发平台。Web 浏览器专门用于显示格式化文本和图像,但是,像本机操作系统一样,浏览器还...
[name, field] of Object.entries(document.fields)) { console.log( `Field ${name} has content '${field.content}' with a confidence score of ${field.confidence}`, ); } } console.log("Pages:"); for (const page of pages || []) { console.log(`Page number: ${page.pageNumber} ($...
1; let products = [1001, "mouse", "monitor", { firstName: "Jin Vincent" }]; /**Output: * 0 * 1 * 2 * 3 * bar */ for (let prop in products) { console.log(prop); //this outputs the index of the array and bar } /** End of for-in loop that iterates over an Array...
var person = new Object();这行代码创建了一个Object的实例，并将值保存了变量person中。 创建对象的...
Create an Array Iterator, and then iterate over the key/value pairs: constfruits = ["Banana","Orange","Apple","Mango"]; constf = fruits.entries(); for(letx of f) { document.getElementById("demo").innerHTML+= x; } Try it Yourself » ...