javascript-algorithms | JS algorithm problems & data structures | Learning library

I am trying to complete the "Map the Debris" freecodecamp challenge https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/map-the-debris, and I think I've gotten it. It works from my PC's code editor, but when I copy/paste into the website area the conditions don't satisfy.

How do I best debug this?

My code is

This is a follow up to my questions on the Arguments Optional Challenge in Freecodecamp (see below0:

I have now satisfied 5/6 conditions of the challenge, except for when the input is addTogether(2,([3])), which returns '23' as a string instead of the correct 'undefined'.

If the [3] is an array, and an array is an object, shouldn't my checkNum function work to label that as undefined? Where was the string generated?

my code now:

Hello guys I am having some issues understanding this challenge from FreeCodeCamp< i just did all the steps that I was told to do on the challange but I can just get it to work, here is the link

https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/basic-javascript/profile-lookup

And here is my solution

This regex has to match passwords that are greater than 5 characters long, do not begin with numbers, and have two consecutive digits.

All the test cases are passing the regex test.

My regex is /(?=^[a-z]+\d{2,})(?=\w{5,})/

I have to use two positive lookaheads to solve this problem to pass the tests.

But astr1on11aut is not passing the test. Why?

Link to problem- https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/regular-expressions/positive-and-negative-lookahead

im studying JavaScript and im trying to solve the problem in this test exercise: FreeCodeCamp Record Collection

I can't understand why it doesnt work. The object details and the problem description are in the link above.

I'm just trying to learn javascript regex and have been stuck on this problem for a while.

I need to match patterns, some examples below:

I have a question about javascript.

At first, the result of the code below is "-1 Hold", but I'm wondering why does the part where I put mark ① automatically loops with the next arguments?

I was expecting that the function processes through of it and put the result with only one argument, then goes to the next arguments. So I expected "1 Bet", "1 Bet", "-1 Hold", "0 Hold", "-1 Hold" would be output as a result.

I couldn't find explanation about this since yesterday to now.. I'd be happy if somebody helps me.

*This is the URL of the task I'm talking about.

Here is the code.

Create Strings using Template LiteralsPassed

I just finished the FreecodeCamp.com quiz Intermediate Algorithm Scripting: Smallest Common Multiple.

The code is working fine for the test cases they give ([1, 5], [5, 1] [23, 18] and [1, 13]) but if I use a bigger range I also have to edit the code and increase the stop condition for the for-loop, and when I remove the stop condition from the loop, it gives an error.