Write a JavaScript function to return powers of two values.Test Data : console.log(isPower_of_two(64)); true console.log(isPower_of_two(94)); false Sample Solution:JavaScript Code:// Define a function named isPower_of_two that checks if a given number is a power of two. function ...
AI代码解释 // 一个带有2个参数的基本函数:functionadd(one,two){returnone+two;}// 调用这个函数并给它2个参数:varresult=add(1,42);console.log(result);// 43// 再次调用这个函数,给它另外2个参数result=add(5,20);console.log(result);// 25 JavaScript 是一个将函数作为一等对象(first-class fun...
favouriteMovies[Symbol.iterator]=function(){const ordered=Object.values(this).sort((a,b)=>a-b);let i=0;return{next:()=>({done:i>=ordered.length,value:ordered[i++]})}}for(const v of favouriteMovies){console.log(v);} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14...
affix({ offset: { top: 100, bottom: function () { return (this.bottom = $('.footer').outerHeight(true)) } } }) Options Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-, as in data-offset-top="200". Nametypedefault...
{ignorePunct:true});// Queue a command to load the search results and get the font property values.context.load(searchResults,'font');// Synchronize the document state by executing the queued commands,// and return a promise to indicate task completion.returncontext.sync().then(function(){...
functionfetchPromiseData(){returnnewPromise((resolve,reject)=>{setTimeout(()=>{letdata="Promise data";resolve(data);},2000);});}fetchPromiseData().then(data=>{console.log("Promise data: "+data);}).catch(error=>{console.log("Error: "+error);});// 输出: "Promise data: Promise dat...
ES6提供了三个新的方法–entries(),keys()和values()–用于遍历数组.它们都返回一个遍历器对象(详见《Iterator》一章),可以用for…of循环进行遍历,唯一的区别是keys()是对键名的遍历,entries()是对键值对的遍历。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 for (let index of ['a', 'b'].keys...
Disallows duplicate property names or parameter values.Strict mode throws an error when it detects a duplicate named property in an object (e.g.,var object = {foo: "bar", foo: "baz"};) or a duplicate named argument for a function (e.g.,function foo(val1, val2, val1){}), thereby...
A function produces a side effect if it does anything other than take a value in and return another value or values. A side effect could be writing to a file, modifying some global variable, or accidentally wiring all your money to a stranger....
function funTwo(){ // 内部函数 num++; return num; } return funTwo; } var fun = funOne(); // 返回函数 funTwo //以上代码就构成了一个闭包,其实就是函数 fun。 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.