Text Processing with JavaScript

Recipe 61

Removing Duplicate Spaces

Task

Suppose you have a website with a blog section that allows guest posts. As a reviewer, you have noticed a common mistake in the submitted posts: double spaces between words. To address this issue, you want to create a function that automatically identifies and corrects this error by replacing double spaces with a single space.

A quick and dirty way to convert double spaces to a single space is to use the replaceAll() method like this:

part_3/removing_dup_spaces/removing_dup_spaces_ex1.js

const str = "A  day  without sunshine is like, you know, night.";

str.replaceAll("  ", " ");
// → "A day without sunshine is like, you know, night."

The first argument you pass to replaceAll() is the pattern ...