Numbers.forEach((n, i) => Ĭonsole.log(member.firstName + ' ' + member.

I've seen this anti-pattern so many times.Īnti-pattern: const numbers =, doubled = Keep in mind if you are iterating an array to build another array from it, you should use map. In javascript and in general in all languages, the for statement is used to perform a loop where the number of repetitions is predetermined, although. Normally, you can replace the need to break out of imperative loops by filtering the array elements before iterating them, for example: array.filter(item => ndition console.log(item)) 2009), it has been implemented by nearly all modern engines in the desktop, server, and mobile environments, so it's safe to use them.Īnd with the ES6 arrow function syntax, it's even more succinct: array.forEach(item => console.log(item)) Īrrow functions are also widely implemented unless you plan to support ancient platforms (e.g., Internet Explorer 11) you are also safe to go. The JavaScript loops are used to iterate the piece of code using for, while, do while or for-in loops. Being almost ten years as the time of writing that the ES5 specification was released (Dec.

For of loop javascript