How to decode a string using regex?

@lily 

To decode a string using regex, you can use the replace() method in JavaScript. Here's an example of how to create a simple regex pattern to replace certain characters in a string:

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let encodedString = "H3ll0 W0rld!";
let decodedString = encodedString.replace(/[0-9]/g, ""); // Replace all numbers in the string with an empty string

console.log(decodedString); // Output: "Hll Wrld!"

In this example, the regex pattern [0-9] matches any digit in the string, and the g flag is used to replace all occurrences of the pattern. You can customize the regex pattern to match different characters or patterns in the string that you want to decode.