Dart Dartz Functional Programming Applicative Currying

Dartz applicatives curried addition (.ap)

The practical example of applicative and curry function using dartz

Warning

This snippet uses dartz package, so make sure you have already imported it.

import 'package:dartz/dartz.dart';

Code

void main() {
  final curried = (String x) => (double y) => (int z) {
        return x + y.toString() + z.toString();
      };

  final a = some('x').map(curried);
  final b = some(5.0).ap(a);
  final c = some(-5).ap(b);

  print(c);
}

Result

Some(x5.0-5)