From: lith <minilith@...>
Date: 2009-07-13T02:49:55+09:00
Subject: Re: Prototype-Based Inheritance (#214)

>     pele = {:name => "Pele", :sport => "football", :position => "Forward"}
>     pele_jr = {:name => "Pele Jr."}
>     pele_jr.prototype = pele
>     pele_jr.name # => "Pele Jr."
>     pele_jr.sport # => "football"
>     pele_jr.position # => "forward"

What about:


class Hash

    def prototype=(prototype)
        merge!(prototype) {|k,o,n| o}
    end

    def method_missing(name, *args, &block)
        if has_key?(name)
            val = fetch(name)
            case val
            when Proc
                return val.call(self, *args)
            end
        end
        if name.to_s =~ /^(.*?)=$/
            meth = :[]=
            name = $1.intern
        else
            meth = :[]
        end
        margs = [name, *args]
        margs << block if block
        send(meth, *margs)
    end

end


This would allow you to do something like:

pele_jr.age = 20
pele_jr.foo = lambda {|this, a| this.age + a}
pele_jr.foo(10) #=> 30