Adding functions to javascript's Array class breaks for loops?

The for...in loop is used for looping through properties of an object. If you want to get the values from your array, you can do this.

The accepted solution solves your immediate problem, but extending core objects is generally a bad idea. What happens when you include a library later that uses for..in? Or when you forget months later and use the wrong approach in a different section of your code?

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