objects.js

#!/usr/bin/env node

var Y = exports;

var createObject = Y.createObject = function (d) {
    var s = this;
    return function () {
        var operations = 'keys,values,has,set,get,iter,next,reset';

        var s = this, o = (function () { return (new function () {}); }).call(s),
            S = ',', _ = operations.split(S), 
            c = 0; 

        // decorator
        s.d = d;

        // keys
        o[_[0]] = function () {
            var out = [];
            for ( var k in o ) if ( !(_.indexOf(k) > -1) ) out.push(k);
            return out;
        };

        // values
        o[_[1]] = function () {
            var out = o.keys().map(function (k) { return o[k]; });
            return out;
        };

        // has
        o[_[2]] = function (k,v) {
            var out = false; 
            if ( k !== undefined ) {
                out = ( o[k] !== undefined );
                if (v !== undefined) { return out && o[k] === v; }
            }
            return out;
        };

        // set
        o[_[3]] = function (k,v) {
            var out = undefined;
            if (!o.has(k) && v !== undefined) { o[k]=v; out = o[k]; }
            return out;
        };

        // get
        o[_[4]] = function (k,r) {
            var out = r !== undefined && r || '';
            if (o.has(k)) { out = o[k]; }
            return out;
        };

        // iter
        o[_[5]] = function ( fn ) {
            var s = this, fn = fn || function () {},
                keys = o.keys(), values = o.values(), 
                out = [], i = 0; 
            do {
                var k = keys[i], v = values[i]; 
                out.push( fn.call(s,k,v) );
                i += 1;
            } while ( i < keys.length );
            return out;
        };

        // next
        o[_[6]] = function ( fn ) {
            var s = this, fn = fn || function () {},
                keys = o.keys(), values = o.values();
            var k = keys[c], v = values[c];
            c++;
            return fn.call(s,k,v);
        };

        // reset
        o[_[7]] = function () { c=0; };

        // apply decorator
        (function (o) {
            if ( s.d !== undefined ) for ( var k in s.d ) if (!o.has(k)) o[k] = s.d[k]; 
        }).call(s,o);

        return o;
    }.call(s);
};