You can do the same with a for..in loop to iterate on an object:const fun = (prop) => { return new Promise(resolve => { setTimeout(() => resolve(`done ${prop}`), 1000); }) } const go = async () => { const obj = { a: 1, b: 2, c: 3 }; for (const prop in...
You can also use for...in to loop through an array or a string by using their index values:const str = 'JavaScript Loops' for (const index in str) { console.log(`${str[index]} is at ${index} index.`) } // J is at 0 index. // a is at 1 index. // v is at 2 index...
Making changes to properties in a for...in loop should be avoided. This is mostly due to its unordered nature. So, if you delete an item before you reach it in the iteration, the item will not be visited at all in the entire loop. Similarly, if you make changes to a property, it...
program in JavaScript. To make the program more interesting, we’ll modify the traditional “Hello, World!” program so that it asks the user for their name. We’ll then use the name in a greeting. When you’re done with this tutorial, you’ll have an interactive “Hello, World!” ...
Topic:JavaScript / jQueryPrev|Next Answer: Use thefor...inLoop You can simply use thefor...instatement to loop through or iterates over all enumerable properties of an object in JavaScript. Thefor...inloop is specifically built for iterating object properties. ...
How would I amend this to allow my sound file to loop? Everything plays at the moment apart from looping. Thanks. _main = this; this.stop(); createjs.Sound.on("fileload", handleFileLoad); createjs.Sound.registerSound("sounds/soundtrack.mp3", "MySound"); function h...
The “for” loop is the basic programming feature that is utilized for executing a block of code repeatedly. In TypeScript, the for loop has the same syntax as the for loop in JavaScript, with some additional features that make it more powerful and flexible. It is used to perform a varie...
JavaScript arrays also have a built-in method calledforEach()that can be used to loop through an array. TheforEach()method takes a callback function as its parameter, which is called for each element of the array. Here is an example of using theforEach()method: ...
When learning how to make a quiz in HTML and JavaScript, it’s important to understand how the HTML structure interacts with the JavaScript logic. So, as the first step, let’s set up the HTML structure of our JavaScript quiz game.A <div> to hold the quiz. A <button> to submit the...
How to Use the for...in Loop of JavaScript Thefor...inloop in JavaScript iterates through an array and returns its index. You'll find it easy to usefor...inif you're familiar withPython's for loopas they're similar in regards to simplicity and logic. Take a look at its general ...