Underscore java

_.java

/////////////////////////////////////////////////////
//
//     Moved to repository:
//       https://github.com/Oregu/_.java
//
/////////////////////////////////////////////////////

import java.util.function.BiFunction;
import java.util.function.Function;

public interface _ {
  static <T,U,R> Function<T, Function<U, R>> curry(BiFunction<T, U, R> bi) {
    return t -> u -> bi.apply(t ,u);
  }

  static IntFunction<IntUnaryOperator> curry(IntBinaryOperator bi) {
    return l -> r -> bi.applyAsInt(l ,r);
  }

  static <T,U,R> Function<U, R> partial(BiFunction<T, U, R> bi, T t) {
    return u -> bi.apply(t ,u);
  }

  static <CT extends List<T>, T, R> List<R> map(Function<T, R> f, CT coll) {
    return coll.stream().map(f).collect(toList());
  }
}

_.map(Field::getName, fields)

currySum = _.curry((int a, int b) -> a+b);
sumWith7 = currySum.apply(7);

import static java.util.stream.Collectors.toList; ?