Regular Expressions: Restrict Possible Usernames -- Feedback on my solution?

[MikeMaer]

Hello all, newbie here.

After hours of research and trying different things I finally came up with an acceptable solution.

My progress really sped up once I saw someone suggesting this tool – https://www.regexpal.com/

For anyone struggling I really suggest it!

Does anyone have any feedback on my code? Any suggestions on how it could improve or anything that seems redundant?

let userCheck = /^[a-zA-Z]+([a-zA-Z]|\d{2,}?)$/i; // Change this line

Thanks!

[KittyKora]

The link looks cool
the code 2

let userCheck = /^[a-zA-Z]+([a-zA-Z]|\d{2,}?)$/i; // Change this line

but what is it suppose to do?

[MikeMaer]

Oops ---- I didn’t link properly to the problem.

freeCodeCamp Challenge Guide: Restrict Possible Usernames

Restrict Possible Usernames Solutions

Solution 1 (Click to Show/Hide)

let username = "JackOfAllTrades"; let userCheck = /^[a-z][a-z]+\d*$|^[a-z]\d\d+$/i; let result = userCheck.test(username); console.log(result) <a name="code-explanation-3" class="anchor" href="#code-explanation-3"></a>Code Explanation ^ - start of input [a-z] - first character is a letter [a-z]+ - following characters are letters \d*$ - input ends with 0 or more dig…

[ravionline]

@MikeMaer

let userCheck = /^[1]+([a-zA-Z]|\d{2,}?)$/i;

This regex will fail to validate usernames ending with just a single digit, like, mikemaer2. The ? doesn’t serve any purpose too – since we’re using the $ anchor, the digits match can never be lazy.

Mike, I’m sure you’ve moved much further ahead on FCC; this is just for any newbies checking the forum for different solutions to this exercise.

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1. a-zA-Z ↩︎