Tell us what’s happening:
Hi,
I got this challenge figured out only after reading the help section. But I still need to understand what happened here. I am really confused what the .push and .shift really do in this context and why it worked.
Any explanation for helping me to understand this is greatly appreciated.
Your code so far
function nextInLine(arr, item) {
// Your code here
arr.push(item);
return arr.shift(); // Change this line
}
// Test Setup
var testArr = [1,2,3,4,5];
// Display Code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine(testArr, 6)); // Modify this line to test
console.log("After: " + JSON.stringify(testArr));
Your browser information:
User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36
.
Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/stand-in-line