lib/flip.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.flip = flip;
/**
 * Returns a function that is like the original function,
 * only the first two arguments are flipped.
 *
 * @since v0.1.0
 * @param {Function} fn
 * @return {Function}
 * @example
 *   const merge = (a, b) => [].concat(a, b)
 *   flip(merge)(1, 2) // => [2, 1]
 */
function flip(fn) {
  return function (y, x) {
    for (var _len = arguments.length, args = Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
      args[_key - 2] = arguments[_key];
    }

    return fn(x, y, args);
  };
}