What are some common errors when working with arrays in JavaScript?

What are some common errors when working with arrays in JavaScript?

Some common errors include off-by-one errors, using the wrong array methods, and mutating arrays unexpectedly.

Can you explain what an off-by-one error is?

An off-by-one error occurs when you incorrectly iterate through an array, often starting or ending at the wrong index.

What are some wrong array methods I might use?

Using methods like push instead of unshift or splice instead of slice can lead to unexpected results.

How can I avoid mutating arrays unexpectedly?

To avoid this, use methods that return new arrays, like map, filter, or concat, instead of methods that modify the original array.