Go streams meet standard Go iterators!

In a previous blog post, titled&#xA; Performance comparison of Go functional stream libraries ,&#xA;we compared the performance and features of several Go functional stream libraries.&#xA;Since then, the Go standard library has added the iter package ,&#xA;which defines a foundation for iterators, as well as many other packages allowing&#xA;to manipulate slices and maps &#xA;in a functional style.