partially-applied-functions-example.js

// from react-dnd
// module.exports = DragLayer(collect)(ItemPreview);
let function1 = DragLayer(collect);
let function2 = function1(ItemPreview);
module.exports = function2;

function partial_sum(a) {
  return function (b) {
    return a+b;
  };
}
let f1 = partial_sum(1);
// much time passes...
let value = f1(2); // return 1+2;