JS Cons Trick

toy.js

(function () {
    var exports = {};

    exports.makeArray = function (a, b) {
        return function(chooser) {
            return chooser(a, b);
        };
    };

    exports.first = function (array) {
        return array(function (a, b) { return a; });
    }

    exports.rest = function (array) {
        return array(function (a, b) { return b; });
    }

    // TODO:
    // 1. Add Retrieval by Index.
    // 2. Add nice print representation.
    // 3. Add parser for print representation.

    window.toy = exports;
}());