flip.babel.js

"use strict";

function _toConsumableArray(arr) { 
  if (Array.isArray(arr)) { 
    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { 
      arr2[i] = arr[i]; 
    } 
    return arr2;
  } else {
    return Array.from(arr);
  }
}

var flip = function flip(fn) {
  return function () {
    for (var _len = arguments.length, params = Array(_len), _key = 0; _key < _len; _key++) {
      params[_key] = arguments[_key];
    }
    return fn.apply(undefined, _toConsumableArray(params.reverse()));
  };
};

flip.js

var flip = fn => (...params) => fn(...params.reverse())