Search Results for: php array

This tutorial will show you a practical way to generate a hash for a string in JavaScript, and provide working code examples you can use in your own project. What is a Hash? A Hash or Checksum is a calculated value with a specific length. By passing a hashing algorithm a string – which can be any length – a calculated hash of a consistent length is returned. Whenever the same string is passed to the hashing algorithm, the same calculated hash should be returned. … Read more

Promises are a feature of JavaScript which allow code to continue executing in the background, and perform an action with the result when it has completed. This article will show you how to use Promises. What is a ‘Promise’ in JavaScript? A Promise is an object in JavaScript which acts as a placeholder for the eventual result of an operation. A Promise is either: Pending while the operation completes Fulfilled when the operation is successful Rejected if the operation fails Promises allow for asynchronous code execution in JavaScript. … Read more

This article will show you how a JavaScript while loop is constructed, and what it us used for, with code examples. While loops are one of the simplest kinds of loops, and appear in most programming languages. A while loop runs a block of code repeatedly, until a condition is met. When the while condition is met, the loop stops. It’s important to get comfortable with using loops – and understanding how they work – as they form the backbone of just about every game and application you might write. Make sure you’re familiar … Read more

You’ve searched for ‘JavaScript Print’ – so you’re probably trying to output data to the console, to the webpage or to a printer. Here’s how to do all three. Printing to the Console with console.log() The JavaScript console.log() method prints data to the JavaScript console (visible in your browsers web inspector). Any type of data can be logged to the console, including strings, numbers, arrays, and objects, and either the contents of, or a text representation of, the value will be displayed. console.log() is frequently used for debugging – developers use it to view … Read more

This article will show you how a JavaScript do while loop is constructed, and what it us used for, with code examples. do while loops are one of the simplest kinds of loops, and appear in most programming languages. A do while loop runs a block of code repeatedly, until a condition is met. When the do while condition is met, the loop stops. It’s important to get familiar with using loops – and understanding how loops work – as they form the backbone of just about every game and application you might … Read more

This article will show you how to generate a range of numbers or letters in JavaScript, and provide some functions you can copy and paste into your own project. The Python, PHP, and many other popular programming languages provide a range() function, for generating a range of numbers or letters between two values. JavaScript does not have a built-in function for doing this, but it’s easy functionality to implement yourself. Here’s how to do it, and some pre-made functions you can just paste into your own project to use … Read more

A queue is a commonly used data structure in programming. Here’s how to implement and use a queue in JavaScript. JavaScript doesn’t include a data structure specifically called a queue – but that doesn’t mean the functionality isn’t there. JavaScript arrays can be used in the same way – it’s just the terminology that’s a bit different. Rather than duplicating array functionality for queues, queue functionality exists in the array functions of JavaScript. What is a Queue Data Structure? A queue is a sequence of items in a specific order. Items can be enqueued (added … Read more

JavaScript libraries take the legwork out of building complex applications. Here are some of the most useful libraries to use in 2021/2022. Once you’ve graduated from ‘Hello World!‘ and understand how JavaScript works, you’ll probably want to dive into building something more useful – a website, or a service, or a mobile app. These all have many moving parts – Authentication so users can log in, database support for storing data, file uploads so users can store their cat pictures in the database – all of these … Read more