js iterator


Iterators are objects that implement the Iterator protocol by having a next() method that returns an object with two properties: value and done. Arrays have a @@iterator method that implements the iterable protocol and allows them to be consumed by syntaxes expecting iterables, such as the spread syntax and for...of loops. Iterators allow you to iterate over an object, such as arrays, Map objects, and even strings. 1 2 3

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In this tutorial, we introduce the JavaScript iterator and show you how to use iterators to process data more efficiently
The Essential Guide to JavaScript Iterator

Summary As the name already gives away, iterators allow you to iterate over an object (arrays are also objects). Most likely, you have already used JavaScript iterators. Every time you iterated over an array, for example, you have used iterators, but you can also iterate over Map objects and even over strings.
JavaScript iterators and generators: A complete guide - LogRocket Blog

In this tutorial, you will learn about JavaScript iterators and iterables with the help of examples.
JavaScript Iterators and Iterables

To make the range object iterable (and thus let for..of work) we need to add a method to the object named Symbol.iterator (a special built-in symbol just for ...
javascript.info How to iterate over properties # The proper (and safe) way to iterate over properties is via a tool function. For example, via objectEntries() , whose ...
21. Iterables and iterators

be traversing through an array or maybe many... Tagged with node, javascript, iterators. ... update a record and delete that same record before update (nest js ...
Iterators in JavaScript - DEV Community 👩‍💻👨‍💻