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 ...
It wouldn’t sound too obvious but sometimes your function might need to return multiple values. For instance, in one of the applications I’m working on, I have a JavaScript function where I have to calculate two different values and return them. So, I needed to return two values from t...
function returnMultipleValues() { var value1 = 'Value 1'; var value2 = 'Value 2'; var value3 = 'Value 3'; return [value1, value2, value3]; } var result = returnMultipleValues(); console.log(result); // ['Value 1', 'Value 2', 'Value 3'] 使用对象:可以创建一个包含需要返回...
4 : 5 . . . } The longRunningFnBookKeeper is a simple JavaScript object, which is going to hold all the input (as keys) and outputs (as values) in it as a result of invoking longRunningFunction functions. Now
};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...
function map(arr, fn) { const result = []; for (const value of arr) { result.push(fn(value)); } return result; } const doubleValues = map( [1, 2, 3], (x) => x * 2); // [2, 4, 6] // 返回一个函数 function add(x) { ...
function d(){ function e(){ alert('E'); } return e;}d()();//alerts 'E' 1. The function is still callable. It still exists. This is used in JavaScript all the time. Functions can be passed aroundjustlike other values. Consider the following: ...
String.prototype.interpolate =function(params){constnames =Object.keys(params);constvals =Object.values(params);returnnewFunction(…names,`return \`${this}\`;`)(…vals);}; 至此,只要有对应的数据,我们就可以根据<template>模板获取最终编译好...
Functions Used as Variable Values Functions can be used the same way as you use variables, in all types of formulas, assignments, and calculations. Example Instead of using a variable to store the return value of a function: letx = toCelsius(77); ...
// 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 functions)的语...