How to Replace Multiple Characters in a String with a Single Regular Expression?

Replacing Multiple Characters Simultaneously

When working with strings, it's often necessary to replace multiple characters with different replacements or even remove them altogether. Instead of chaining multiple replace() calls, you can use the OR operator (|) to combine multiple search patterns into a single regular expression.

Consider the following example:

var str = '#Please send_an_information_pack_to_the_following_address:';

You want to replace all instances of '_' with a space and remove all instances of '#'. Instead of using this:

str.replace('#','').replace('_', ' ');

You can combine both patterns into a single regular expression using the OR operator:

str.replace(/#|_/g, '');

The regular expression /#|_/g searches for any character that is either '#' or '_'. The g flag ensures that all matches are replaced throughout the string.

This approach provides a more concise and efficient way to handle multiple character replacements in a single operation.

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