Question

I’m new to Java and wondering how I could go about implementing a method like Ruby’s .each to make iterating over classes like Arrays and Lists easier?

Answer 1

You can’t make an each function, like Ruby has, since Java doesn’t accept blocks as parameters like Ruby does. You could use an interface and provide an anonymous class definition, but that’s way more complicated than just using Java’s for each construct. To do for each in Java, you can do something like the following:

String[] myStrings = { "a", "b", "c" };

for (String str : myStrings) {
    // Do something with each String value.
    System.out.println(str);
}