Re: [twsocket] Original way of iterating thru all the bits in an integer

2013-01-06 Thread Arno Garrels 
François Piette wrote:
 The final code looks like this:
 
 
 
 var
   OneBit : Boolean;
 begin
   for OneBit in TBitIterator.Create(1234) do
 Write(Ord(OneBit));
 end;
 
 
 
 You can read the article at
 http://francois-piette.blogspot.be/2013/01/original-method-to-iterate-bits-w
 ithin.html

Wirth was right: Software is getting slower more rapidly than hardware becomes 
faster. ;)

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Arno
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[twsocket] Original way of iterating thru all the bits in an integer

2013-01-05 Thread François Piette 
Hi !

 

I wrote an article about an original way of iterating thru all the bits of
an integer.

This is the kind of fancy code one could write using recent version of
Delphi. I would like to apply this kind of code in ICS, but if I do, it
won’t work anymore with the old D7.

 

The final code looks like this:

 

var
  OneBit : Boolean;
begin
  for OneBit in TBitIterator.Create(1234) do
Write(Ord(OneBit));
end;

 

You can read the article at
http://francois-piette.blogspot.be/2013/01/original-method-to-iterate-bits-w
ithin.html

 

 

-- 

francois.pie...@overbyte.be

Embarcadero MVP

http://www.overbyte.be

 

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Re: [twsocket] Original way of iterating thru all the bits in an integer

2013-01-05 Thread DZ-Jay 
Hi Francois,

I was just wondering, what would be a practical application of this routine?  
Also, being familiar with Assembly, I have to ask:  wouldn't it be more 
efficient to just shift the value to the left directly without the abstraction 
of the enumerator?

dZ.


On Jan 05, 2013, at 15:21, François Piette wrote:

 Hi !
 
 
 
 I wrote an article about an original way of iterating thru all the bits of
 an integer.
 
 This is the kind of fancy code one could write using recent version of
 Delphi. I would like to apply this kind of code in ICS, but if I do, it
 won’t work anymore with the old D7.
 
 
 
 The final code looks like this:
 
 
 
 var
  OneBit : Boolean;
 begin
  for OneBit in TBitIterator.Create(1234) do
Write(Ord(OneBit));
 end;
 
 
 
 You can read the article at
 http://francois-piette.blogspot.be/2013/01/original-method-to-iterate-bits-w
 ithin.html
 
 
 
 
 
 -- 
 
 francois.pie...@overbyte.be
 
 Embarcadero MVP
 
 http://www.overbyte.be
 
 
 
 --
 To unsubscribe or change your settings for TWSocket mailing list
 please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket
 Visit our website at http://www.overbyte.be

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Re: [twsocket] Original way of iterating thru all the bits in an integer

2013-01-05 Thread François Piette 
 I was just wondering, what would be a practical application of this
routine?  

As you probably don't know, I'm doing a lot of process control with Delphi.
And I frequently have to process bit collections.

  wouldn't it be more efficient to just shift the value to the left
directly without the abstraction of the enumerator?

Yes, that's what I said in the article. Most abstractions, if not all are
always slower than specially crafted code. However frequently efficiency is
not the most interesting factor: ease of write and readability of code tend
to be more important than speed. Usually, speed isn't an issue when you have
an i7 processor at 2GHz as it is when you have a 8 bits microcontroller
running at 1MHz :-)

And as I said in the article, this code has the advantage of being very
simple and help people learn what they can do with an enumerator and how
they can use it in their own application.

http://francois-piette.blogspot.be/2013/01/original-method-to-iterate-bits-w
ithin.html


--
francois.pie...@overbyte.be
The author of the freeware multi-tier middleware MidWare
The author of the freeware Internet Component Suite (ICS)
http://www.overbyte.be



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