rubycollect4j

The rubycollect4j implements all methods refer to Ruby Array, Hash and Enumerable.

For further info, please visit http://ruby-doc.org website.

For more documentation, please read JavaDoc.

With Java 8:
// Sort the characters by its frequency based on the word 'Mississippi' case-insensitively
RubyArray<String> word = ra("Mississippi".split("(?!^)"));

String result = word.map((c) -> {
return c.toLowerCase();
}).sortBy((c) -> {
return word.count(c);
}).uniq().join();

p(result); // "mpis"

With Java 6:
// Sort the characters by its frequency based on the word 'Mississippi' case-insensitively
final RubyArray<String> word = newRubyArray("Mississippi".split("(?!^)"));

String result = word.map(new TransformBlock<String, String>() {
public String yield(String c) {
return c.toLowerCase();
}
}).sortBy(new TransformBlock<String, Integer>() {
public Integer yield(String c) {
return word.count(c);
}
}).uniq().join();

p(result); // "mpis"