If you write JavaScript, you have probably used higher-order functions and not even noticed. If you have ever replaced a for loop with an array method, you’ve used higher-order functions.

In functional programming, there are two varieties of functions: first-order functions and pure functions. First-order functions A first-order function takes standard data types (string, number, ...

Of all the hats JavaScript can wear, its form-processing features are among the most sought and used. Learn how to use JavaScript for form processing, validation, and more.

The following JavaScript functions provide developers with everything they need: concat () – Combines the text of two or more strings and returns a new string.

1. JavaScript Redirects We first tested common JavaScript redirects, varying how the URL was represented in different ways. The method we chose was the window.location function.

At Microsoft's Ignite 2017 conference today, the company announced a range of new features that will be coming to its Excel application, such as JavaScript Custom Functions and more.

Custom functions are not currently available for Excel on mobile devices, or in production versions of Excel. TypeScript users may also write custom JavaScript functions.