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Re: [Help-smalltalk] Number oddity

From: Paolo Bonzini
Subject: Re: [Help-smalltalk] Number oddity
Date: Tue, 23 Aug 2005 10:11:17 +0200
User-agent: Mozilla Thunderbird 0.9 (Macintosh/20041103)

!Number class methodsFor: 'converting'!

  "Let someone ask for a number as a number"

...or has this already been done?
Well, indeed it's already there in 2.2 :-)

But your method should look like
!Number methodsFor: 'converting'!

because it is not a class method.

You can test whether it is implemented with

   Number canUnderstand: #asNumber

because #respondsTo: checks if the object knows about a message, while #canUnderstand: checks whether the *instances* of the objects can answer it. So an alternative would be (not that it makes much sense...)

   Number new respondsTo: #asNumber



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