functional-packs

A library for provide simple functional tools, such mutable tuples, scoping tool and zipping stream with index function.

Scope

scope allow create temp object for initializing or mapping transformation of object.

Demo object

    public static class X {
        public int value = 0;

        public X(int x) {
            this.value = x;
        }

        public X() {
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;
            AppTest.X x = (AppTest.X) o;
            return value == x.value;
        }

        @Override
        public int hashCode() {
            return Objects.hash(value);
        }
    }

Create Scoped Object

  Scope<X> scoped = Scope.of(new X());

** let(Function<I, O> function) ** let function allow transformation operation by returning a scoped new object

  Scope<String> x = Scope.of(new X())
          .let(it -> {
              System.out.println(it.value);
              return "sss";
          })
          ;