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JavaScript JavaScript Loops, Arrays and Objects Tracking Multiple Items with Arrays Removing Items from an Array

Katie Dunayczan
Katie Dunayczan
8,616 Points
Posted by Katie Dunayczan
Katie Dunayczan
8,616 Points

Not sure what I'm doing wrong

I don't understand how to take an item out of an array and put it in another array. I assume you save that item in a variable?

script.js 
var orderQueue = ['1XT567437','1U7857317','1I9222528'];
var shipping = [];
var foo = orderQueue.shift();
shipping.push(foo);
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Loops</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

1 Answer

Tyrell Jentink
Tyrell Jentink
8,415 Points
Tyrell Jentink
Tyrell Jentink
8,415 Points

Remember, arrays ARE variables. You shouldn't have to create a new variable just to store the value you are moving.

Think of functions and methods as a washing machine... A washing machine doesn't care what you put in, it will always just go through the steps of cleaning clothes, and returns them... Similarly, methods and functions don't care what you pass in, they just return a value.

.shift() returns the value you are dropping; So, you should be able to store that returned value into the destination array:

var orderQueue = ['1XT567437','1U7857317','1I9222528'];
var shipping = [];
shipping.push(orderQueue.shift());

That should do the magic.