# Qua

**URL:** <https://www.ruby-forum.com/t/qua/95938>\
**Category:** Ruby\
**Created:** [June 20, 2006, 2:40pm UTC](https://www.ruby-forum.com/t/qua/95938 "2006-06-20T14:40:57Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\
**Post date:** [June 20, 2006, 2:40pm UTC](https://www.ruby-forum.com/t/qua/95938/1 "2006-06-20T14:40:57Z")

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In some of my documentation I have found this wording to be useful: for  
“metaclass” it is “class qua class” or “module qua class”. For an  
object’s singleton class, “object qua class”.

I like quaclass.

T.

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**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\
**Post date:** [June 20, 2006, 7:19pm UTC](https://www.ruby-forum.com/t/qua/95938/2 "2006-06-20T19:19:49Z")

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removed\_email\_address@domain.invalid wrote:

> In some of my documentation I have found this wording to be useful: for  
> “metaclass” it is “class qua class” or “module qua class”. For an  
> object’s singleton class, “object qua class”.
> 
> I like quaclass.

Actually, for us duck typers, a quaclass is anything that behaves like a  
class 😉

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**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\
**Post date:** [June 20, 2006, 7:29pm UTC](https://www.ruby-forum.com/t/qua/95938/3 "2006-06-20T19:29:35Z")

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Joel VanderWerf wrote:

> removed\_email\_address@domain.invalid wrote:
> 
> > In some of my documentation I have found this wording to be useful: for  
> > “metaclass” it is “class qua class” or “module qua class”. For an  
> > object’s singleton class, “object qua class”.
> > 
> > I like quaclass.
> 
> Actually, for us duck typers, a quaclass is anything that behaves like a  
> class 😉

Hey, there’s actually some truth to that. The quaclass can be used to  
make an object quack like another class. 🙂

T.

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<div class="post-metadata">

**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\
**Post date:** [June 21, 2006, 7:54am UTC](https://www.ruby-forum.com/t/qua/95938/4 "2006-06-21T07:54:46Z")

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On 6/20/06, removed\_email\_address@domain.invalid [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> I like quaclass.

Makes a bit of a pun with ‘quack’, as in ‘duck typing’. 🙂

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<div class="post-metadata">

**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\
**Post date:** [June 21, 2006, 4:08pm UTC](https://www.ruby-forum.com/t/qua/95938/5 "2006-06-21T16:08:17Z")

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Dido S. wrote:

> On 6/20/06, removed\_email\_address@domain.invalid [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:
> 
> > I like quaclass.
> 
> Makes a bit of a pun with ‘quack’, as in ‘duck typing’. 🙂  
> Q. How do you turn a duck into a singer?  
> A. Put it in the microwave until its bill withers.

–  
M. Edward (Ed) Borasky

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