source: gs3-extensions/web-audio/trunk/js-dsp/component/crockford-inheritance.js

Function.prototype.getHashCode = (function() {
    var id = 0;
    return function() {
        if (!this["hashCode"]) {
            this["hashCode"] = "<hash|#" + id++ + ">";
        }
        return this["hashCode"];
    }
})();

var toType = function(obj) {
    return ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase();
};


Function.prototype.method = function (name, func) {
    this.prototype[name] = func;
    return this;
};

// Does the same as above, but explicitly rewritten here to provide more meaningful name and (variables)
Function.prototype.staticfield = function (name, field) {
    this.prototype[name] = field;
    return this;
};

Function.method('inherits', function (parent) {
    var d = {}, p = (this.prototype = new parent());

    this.method('uber', function uber(name) {
        if (!(name in d)) {
            d[name] = 0;
        }        
        var f, r, t = d[name], v = parent.prototype;
        if (t) {
            while (t) {
                v = v.constructor.prototype;
                t -= 1;
            }
            f = v[name];
        } else {
            f = p[name];
            if (f == this[name]) {
                f = v[name];
            }
        }
        d[name] += 1;
        r = f.apply(this, Array.prototype.slice.apply(arguments, [1]));
        d[name] -= 1;
        return r;
    });

    return this;
});

Function.method('swiss', function (parent) {
    for (var i = 1; i < arguments.length; i += 1) {
        var name = arguments[i];
        this.prototype[name] = parent.prototype[name];
    }
    return this;
});