What are some common mistakes when using map, filter, and reduce in JavaScript?

What are some common mistakes when using map, filter, and reduce in JavaScript?

Some common mistakes include using the wrong method for the task, not returning values correctly, and mutating the original array.

Can you give an example of using map incorrectly?

Sure! A common mistake is forgetting to return a value in the map callback, which results in an array of undefined values.

What about filter? What mistakes do people make?

With filter, a common mistake is using it when you should be using map, or not returning a boolean value in the callback.

How can I avoid these mistakes?

To avoid these mistakes, always check the method's purpose, ensure you return the correct values, and test your code with different inputs.