Intermediate Algorithm Scripting: Steamroller code validation issue?

freeCodeCamp Support
1

I got stuck doing this one so I went to the solutions and after reading through camperBot’s solutions and understanding the problem, I implemented my own solution which failed the

" Your solution should not use the Array.prototype.flat() or Array.prototype.flatMap() methods."

test, even though I did not use either of those methods. I then went back to the solutions and copied and pasted camperBot’s solutions into the sandbox to test them and for some reason, all of the official solutions, except solution #3 failed this test.

2

Can we see your code? And a link to the challenge?

3

Link to the challenge: https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller

My code:

function steamrollArray(arr) {
  let results = []
  function flatten(item) {
    if(!Array.isArray(item)){
      results.push(item)
    } else {
      item.forEach(flatten)
    }
  }
  arr.forEach(flatten)
  return results
}

Link to camperBot’s solutions: http://forum.freecodecamp.org/t/freecodecamp-challenge-guide-steamroller/16079

4

I think the validator is checking for any variation of ‘flat’ in the code, because I changed flatten to squish and got my previous code to pass the last test.

New code:

function steamrollArray(arr) {
  let results = []
  function squish(item) {
    if(!Array.isArray(item)){
      results.push(item)
    } else {
      item.forEach(squish)
    }
  }
  arr.forEach(squish)
  return results
}
1 Like
5

Yeah, I think you might be right. This is the sort of thing that probably would be worth making a GitHub issue for.

1 Like
6

Will do! Thanks for your help

7

Had the same problem, the test will fail if flat or flatten appears in your code. Even if it is commented out. Just like @IamSurrett mentioned.