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JavaScript Create an Array of Objects

Nicholas Wallen
Nicholas Wallen
12,278 Points
Posted by Nicholas Wallen
Nicholas Wallen
12,278 Points

Not sure why the total price isn't calculating...

https://w.trhou.se/7ax7lylzo1

I have it copied word for work what the instructor had. But mine is calculating some crazy random numbers. Thoughts?

1 Answer

Emmanuel C
Emmanuel C
10,636 Points
Emmanuel C
Emmanuel C
10,636 Points

Hey

Looking through your code, I noticed that the totalValues variable in your totalValue function is initialized to an empty array instead of a 0 like the instructor had it, which was causing all sorts of funkyness. After setting it to 0 the value returned was the same that the instructor had. So that should do it.

andren
andren
28,558 Points
andren
andren
28,558 Points

This is correct, for those curious the reason that the "funkyness" occurs is that the += operator can only be used on int and string values. Using it on a type it is not compatible with results in JavaScript converting the value to a string.

So the variable gets converted from a list to a string once the += operator runs the first time, and from there it just has numbers concatenated to it. That's why you end up with such a long number, all of the prices are just glued together in a line instead of actually being added together mathematically.