From: Robert Dober <robert.dober@...>
Date: 2006-09-28T05:47:47+09:00
Subject: Re: How to copy a method from one class to another

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<SNIP>
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So I thaught somebody might come up with a definition, but no :(

Wikipedia tells us

first class objects are

   - being expressible as an anonymous literal
value<http://en.wikipedia.org/wiki/Literal_value>
   - being storable in variables<http://en.wikipedia.org/wiki/Program_variable>
   - being storable in data
structures<http://en.wikipedia.org/wiki/Data_structures>
   - having an intrinsic identity (independent of any given name)
   - being comparable for equality with other entities
   - being passable as a parameter to a procedure/function
   - being returnable as the result of a procedure/function
   - being constructable at runtime<http://en.wikipedia.org/wiki/Runtime>


http://en.wikipedia.org/wiki/First-class_object


I would define Ruby Methods as first class objects as they meet *all* the
conditions above

Object.instance_method(:send) == Object.instance_method(:send)   ==> true,
<Shaking forefinger>Trans what was that object_id thing about?</Shaking
forefinger>

I hope you all agree that strings are first class objects and of course
"a"=="a" ==> true
but
"a".object_id == "a".object_id ==> false.

Nobody gonna talk me out of it anymore, Ruby's methods are 1st class (not
buisness class or ecconomie class, no Sir) First Class :)

Cheers
Robert

Any argument would lead back to "is object_id identity aequivalent to object
identity", hopefully we can spare this.

R.

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