Circular dependencies in CJS

even.js

"use strict";

module.exports = function (module, oddModule) {
    module.exports = function even (n) {
        return n == 0 || oddModule.exports(n - 1);
    };
};

index.js

"use strict";

var oddModule = {};
var evenModule = {};

require("./odd.js")(oddModule, evenModule);
require("./even.js")(evenModule, oddModule);

module.exports.odd = oddModule.exports;
module.exports.even = evenModule.exports;

odd.js

"use strict";

module.exports = function (module, evenModule) {
    module.exports = function odd (n) {
        return n != 0 && evenModule.exports(n - 1);
    };
};