Javscript basic algorithms mutation

hello please can anyone tell me why this doesnt work to solve mutation challenge in basic algorithms ( js curriculim)

     function mutation(arr) {
var arr1=arr[0].toLowerCase();
var arr2=arr[1].toLowerCase();
var hamza=/arr2/;


if(hamza.test(arr1)){
  return true 
}





  return false;
}



mutation(["hello", "hey"]);
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Challenge: Mutations

Link to the challenge:

Yeah, I’m not sure, that this will work with a regex. Just one example:

mutation(["floor", "for"]) should return true.

But if you take the regex /for/ and test it against ‘floor’ it returns false, because the pattern ‘for’ is nowhere in the word floor. but it should return true, because all of its letters are included in the word ‘floor’.

So understand this: Your regex checks for that specific pattern, in that specific order.

To be more precise, it doesn’t even check for the value of arr2.
The correct way to declare the regex would be like this:
var hamza= new RegExp(arr2)
The way you are doing it, it will look not for the value of the variable ‘arr2’ but instead it will look for the pattern ‘arr2’.)

I think, you will be able to figure out how to solve it, if you look for something else than regex :wink:

i understand now thanks a lot bro

I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).

hello if you are still getting problem solving it
you can copy and paste my code

hello if you are still getting problem solving it
you can copy and paste my code

FULL SOLUTION REDACTED

It is great that you solved the challenge, but instead of posting your full working solution, it is best to stay focused on answering the original poster’s question(s) and help guide them with hints and suggestions to solve their own issues with the challenge.

We are trying to cut back on the number of spoiler solutions found on the forum and instead focus on helping other campers with their questions and definitely not posting full working solutions.