Convert an loop (while and for) to stream

Question

I have started working with Java 8 and trying to convert some loops and old syntax in my code to lambdas and streams.

So for example, I\'m trying to convert this whi

Answer 1

To answer your question, it's a 1-liner:

List list = oldList.stream()
    .filter(line -> map.keySet().stream().anyMatch(line::startsWith))
    .map(line -> map.entrySet().stream()
        .filter(entry -> line.startsWith(entry.getKey()))
        .map(entry -> line.replace(entry.getKey(), entry.getValue()))
        .findFirst().get())
    .collect(Collectors.toList());