What are some common mistakes when using map and reduce?

What are some common mistakes when using map and reduce?

Some common mistakes include not returning the correct value in the callback, using the wrong data type, and not handling edge cases.

Can you give an example of a mistake with the map function?

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

What about reduce? What mistakes should I watch out for?

With reduce, a frequent mistake is not initializing the accumulator, which can lead to unexpected results.

How can I avoid these mistakes?

To avoid these mistakes, always ensure you return a value in your callbacks and test your functions with various inputs.