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Re: 500. Turbo Sort [message #172626 is a reply to message #172622]

Tue, 22 February 2011 12:16

sheldonlg
Messages: 166
Registered: September 2010

Karma:

Senior Member

On 2/22/2011 4:47 AM, The Natural Philosopher wrote:
> Álvaro G. Vicario wrote:
>> El 22/02/2011 6:00, n00m escribió/wrote:
>>> Actually I sort (in usual sense) nothing.But my output is sorted, of
>>> course.
>>>
>>>> Shouldn't it be $i++ not ++$i on the for loop?
>>>
>>> And what's the difference (I refer only to my code above)?
>>> It's because my fingers like a bit more to press "++" first, then the
>>> rest.
>>> A kind of mechanical habit.
>>
>> It's documented here:
>>
>> http://es2.php.net/manual/en/language.operators.increment.php
>>
>>
> But since the value of $i is not tested in that statement, it makes no
> difference.
>
> It does in the sort of statement like while($i++<10); versus while(++$i<10)
>
> I think. I NEVER EVER use an increment operator in a test statement
> because if I can't remember, chances are the next person to read the
> code wont, either.
>
> Always ask yourself, 'how stupid, lazy & forgetful can I be on a Bad
> Monday morning in February, double it, and assume the guy who has to
> maintain your code is worse'
>
> THEN when you come back to your code on that morning after a row with
> your other half, ha raging hangover and you crashed the car on the way
> in, you stand some chance of being able to find the bug as well;-)

This illustrates the problem I had with C programmers back in the days.
They tended to have a "Name That Tune" philosophy. "I can write that
code in five lines". "I can write that code in three lines". I can
write that code in one line." "Write that code".

Debugging that one line multi-multi conditions for loop was a nightmare.
I could not set a break point inside the loop because everything was
done inside the definition of the loop. I would have to rewrite it so
that I could set some break points and examine values in the debugger.
For the the example above, it would then become either

if (i < 10) ....
i++

or

i++
if (i < 10)

and I knew then exactly what I wanted. So, I agree, NEVER include an
increment inside a test.

--
Shelly

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[Message index]

		500. Turbo Sort By: n00m on Tue, 22 February 2011 02:57
		Re: 500. Turbo Sort By: Jerry Stuckle on Tue, 22 February 2011 03:43
		Re: 500. Turbo Sort By: n00m on Tue, 22 February 2011 03:56
		Re: 500. Turbo Sort By: The Natural Philosoph on Tue, 22 February 2011 03:57
		Re: 500. Turbo Sort By: Peter H. Coffin on Tue, 22 February 2011 04:22
		Re: 500. Turbo Sort By: Kevin Wells on Tue, 22 February 2011 04:30
		Re: 500. Turbo Sort By: n00m on Tue, 22 February 2011 05:00
		Re: 500. Turbo Sort By: n00m on Tue, 22 February 2011 05:26
		Re: 500. Turbo Sort By: alvaro.NOSPAMTHANX on Tue, 22 February 2011 09:25
		Re: 500. Turbo Sort By: The Natural Philosoph on Tue, 22 February 2011 09:47
		Re: 500. Turbo Sort By: sheldonlg on Tue, 22 February 2011 12:16
		Re: 500. Turbo Sort By: Thomas 'PointedEars' on Wed, 23 February 2011 01:15
		Re: 500. Turbo Sort By: Luuk on Tue, 22 February 2011 09:22

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