Need to modify the number of items during a map in #JavaScript? Use flatMap, which was introduced in ES10! 🔥 #dev #development #code

@yasyaindr If you tried to do this with map(), you would end up with nested arrays: [[1, 2], [3, 4]]. You would then need to use flat() on that result to get [1, 2, 3, 4]. flatMap() is a more efficient way to handle both of those operations at once.

@devcastcode @yasyaindr flat is also introduced in this version You'd need to do a quick reduce otherwise