freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/regular-expressions/match-anything-with-wildcard-period/index.md

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Match Anything with Wildcard Period

Match Anything with Wildcard Period

Hint 1:

The dot . is the key in this challenge.

Hint 2:

You should put the dot on the right position.

Solution

let exampleStr = "Let's have fun with regular expressions!";
let unRegex = /.un/; // Change this line
let result = unRegex.test(exampleStr);

Explaination

The period . will be any one character so the strings "run", "sun", "fun" and "pun" have the same un charaters.