Stand in Line challenge, i get stuck here

JavaScript
1

Tell us what’s happening:
please, I completely confuse, try but stuck, please help.

Your code so far

function nextInLine(arr, item) {
  // Your code here
  arr.push(item);
  arr.shift(arr [0]);
  return arr[0] || item;
}

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

// Display Code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine (testArr, 1)); // Modify this line to test
console.log("After: " + JSON.stringify(testArr));

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36.

Link to the challenge:
https://www.freecodecamp.org/challenges/stand-in-line

2

array.shift() will always pop the first element, so you don’t need to give it an argument (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/shift). It returns the element that it removes so you can store that in a variable and then return it, or you can do both steps in one.

3

image
image1280×768 98.9 KB

please, i appreciate your help, please more light on how to go about this.

4

You are shifting twice, i.e. each time you call arr.shift() it removes the first item, you need to shift only once.

5

ok got it thanks for your contribution