In general, functional programming looks to use functions ... bandNames is an array that has just the string band names Array.map() is a very powerful mechanism for transforming arrays.

The above code exercises the three mentioned approaches for getting a String out of an array on the three different types of arrays: single dimension, multi dimension, and null array. The output ...

Array.join(), for example, will take the array that .join() was added to and turn it into a single string. Don't worry ... Basically, you put whatever code you want to run inside the curly braces.