Basic JavaScript - Stand in Line

JavaScript
#1

Tell us what’s happening:
Describe your issue in detail here.

Your code so far

function nextInLine(arr, item) {
  // Only change code below this line
  arr.push(5)
  arr.unshift(1)
  


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

// Setup
const 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));

Your browser information:

User Agent is: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Challenge: Basic JavaScript - Stand in Line

Link to the challenge:

#2

Try this:

function nextInLine(arr, item) {
  // Only change code below this line
  arr.push(item);
  const removed = arr.shift();
  return removed;
  // Only change code above this line
}
1 Like
#3

Do you just do this challenge?

#4

Did it work?

No, I did it earlier.

#5

It worked but has two step what are really dificult for me

  • nextInLine([2], 1) should return 2

  • Failed:nextInLine([5,6,7,8,9], 1) should return 5

#6
  • Test nextInLine([2,1]); runs.
  • The nextInLine function is called. arr becomes [2]. item becomes 1.
  • arr.push(item); Pushes 1 to [2]. So arr is now [2,1].
  • const removed = arr.shift(); removes the first element. So arr is now [1]. 2 has been removed and is stored in removed.
  • return removed; 2 is returned.

Note: You don’t actually need the variable removed. The element removed can be returned directly using return arr.shift();.

1 Like
#7

Found the explanation here:

#8

Very very thank you, i do and result thanks @Muzzammmill

#10

Done i do this
right now
Thanks

1 Like
#11

I can’t figure out why my code is not passing. I have tried everything and can’t see why I’m not passing any tests. Here is my code:

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

None of the tests pass, so I’m getting all errors.

#12

Nevermind. I figured it out.

#13

how did you figure it out. I’m hooked on this too

#14

If you have a question about a specific challenge as it relates to your written code for that challenge, and you’ve tried to solve it at least 3 times so far and still need some help, just click the Ask for Help button located on the challenge (it looks like a question mark).
This button will create a new topic with all code you have written and include a link to the challenge also. You will still be able to ask any questions in the post before submitting it to the forum.

Thank you.

#15

For me, the js page in the index folder was linked incorrectly.