Re: [Pharo-project] About ~= and ~~

[Levente Uzonyi]

On Wed, 12 Oct 2011, Clara Allende wrote:

Hi guys,

I'm wondering, why?

ProtoObject>> ~~ anObject
   "Answer whether the receiver and the argument are not the same object
   (do not have the same object pointer)."

   self == anObject
       ifTrue: [^ false]
       ifFalse: [^ true]

Instead of:
ProtoObject>> ~~ anObject
   "Answer whether the receiver and the argument are not the same object
   (do not have the same object pointer)."

   ^(self == anObject) not

And why?
Object >> ~= anObject
   "Answer whether the receiver and the argument do not represent the
   same object."

   ^self = anObject == false

Instead of
Object>> ~= anObject
   "Answer whether the receiver and the argument do not represent the
   same object."

   ^(self = anObject) not.

Is there any particular reason for this that I'm missing?

Performance.


Levente

Thanks in advance!
--

"*Most good programmers do programming not because they expect to get paid
or get adulation by the public, but because it is fun to program.*"

Linus Torvalds