Basic JavaScript - Stand in Line

JavaScript
1

Hello,

My code is the following:

function nextInLine(arr, item) {
  // Only change code below this line
    function nextInLine(arr,item){
    arr.push(item)
    return arr.shift()

  }
  return item;
  // Only change code above this line
}

// Setup
let testArr = [1, 2, 3, 4, 5];

// Display code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine(testArr, 6));
console.log("After: " + JSON.stringify(testArr));

I’m not passing the last test which is the following;

nextInLine([2], 1)

According to freecodecamp, this should return 2. However I don’t understand why because the function nextInLine is supposed to basically push number 1 to the array and remove 2 which is the first value of the array.

Is this test wrong?

2

Can you post a link to the challenge please?

1 Like
3

Absolutely! Sorry about that

This is the link: https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/basic-javascript/stand-in-line

4

I just noticed my error. I was using a callback function, didn’t pay attention to it until now.
The solution is the following:

function nextInLine(arr, item) {
  // Only change code below this line
    arr.push(item)
    return arr.shift()

  return item;
  // Only change code above this line
}

// Setup
let testArr = [1, 2, 3, 4, 5];

// Display code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine(testArr, 6));
console.log("After: " + JSON.stringify(testArr));
5

Yes, your solution works fine but you only need the first return statement. The other is redundant.

6

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