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Re: terminate a PHP script [message #172603 is a reply to message #172593]

Tue, 22 February 2011 03:55

The Natural Philosoph
Messages: 993
Registered: September 2010

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Senior Member

sheldonlg wrote:
> On 2/21/2011 8:46 PM, The Natural Philosopher wrote:
>> sheldonlg wrote:
>>> On 2/21/2011 7:28 PM, The Natural Philosopher wrote:
>>>> sheldonlg wrote:
>>>> > On 2/21/2011 12:06 PM, Denis McMahon wrote:
>>>> >> On 21/02/11 16:51, n00m wrote:
>>>> >>>> No, you should not use goto! It causes more problems than it
>>>> >>>> solves.
>>>> >>>
>>>> >>> Why on the earth???
>>>> >>> "goto" can produce 10000 empty lines in no time. Like this:
>>>> >>
>>>> >> Because there is no structure to a program that uses goto. When it
>>>> >> fails
>>>> >> to work properly (and it will) it can become impossible to see how it
>>>> >> arrived at the point that it fails at.
>>>> >>
>>>> >>> $cnt = 0;
>>>> >>>
>>>> >>> mm:
>>>> >>> ++$cnt;
>>>> >>> echo '<BR>';
>>>> >>> if ($cnt< 10000) goto mm;
>>>> >>
>>>> >> Your goto method uses 5 lines. A while loop uses 2:
>>>> >>
>>>> >> $i = 10000;
>>>> >> while ($i--) echo "<br>\n";
>>>> >>
>>>> >> and a for loop only 1:
>>>> >>
>>>> >> for ($cnt = 10000; $cnt--;) echo "<br>\n";
>>>> >>
>>>> >> or:
>>>> >>
>>>> >> for ($cnt = 0; $cnt< 10000; $cnt++) echo "<br>\n";
>>>> >>
>>>> >> Rgds
>>>> >>
>>>> >> Denis McMahon
>>>> >
>>>> > I fully agree about gotos. There is NO need for them. What is wrong
>>>> > with this pseudocode?
>>>> >
>>>> > ===========
>>>> > if (passes test for failure condition) {
>>>> > ... all the rest of the code for success that is already there
>>>> > --- except the footer
>>>> > }
>>>> >
>>>> > footer stuff.
>>>> > ==========
>>>> >
>>>> > All it does is add two lines (the if test and a closing brace) and one
>>>> > level of indentation, and it does what the OP wants.
>>>> >
>>>> > Since seeing the if-then-else first appear in Fortran circa 1980, I
>>>> > have never used a single goto in any language in which I have coded.
>>>> >
>>>> Well that's cos you never wrote Assembler :-)
>>>>
>>>
>>> Correct! That was before even my time. :-) By the time I got into it
>>> with Fortran IV, the compiled code looked an awful lot like Assembly
>>> code. Machines should be labor saving devices. That was what the
>>> compiler was for. Besides, it is much easier to debug and maintain a
>>> language that is readable, and not like spaghetti code (gotos and
>>> jumps).
>>>
>> The art of writing assembler, is to MAKE it readable DESPITE the
>> language.
>>
>> And, if you wanted to write hardware code in the 80's for them new
>> fangled Micro Processors, that mate, was all there was!
>
> I understand that. I also understand that this is three decades later.
> Do you still wear leisure suits

I never did.

and sport an Afro

Mm. almost

or go to discos?

I never did that either beyond as brief foray into running, then
building them, in the 60. and 70's..

BUT I can assure you assembler is alive and well, and still used where
the high level languages don't cut the mustard.

As I said, here we talk noddy scripts in PHP, but that's not always what
all of us have done. Or still do.

I have a project on the back burner which if I ever resurrect it, will
have to be done in PIC or ATMEL assembler, because nothing else will get
the speed at the price..

I'll probably do a lot in C as well, the scheduler and main task will be
assembler, because I have to squeeze every clock cycle out of it.

I'll bet your video card is not programmed in Pascal or PHP either :-)

And the core of whatever OS you use. Its easier to write a pre-emptive
scheduler in assembler than even in C, though I *think* its possible
given that the compiler can handle interrupt service routines.

I do know last time I did that, it got too hard, and i coded the core in
Assembler, and having done that, a lot more than I strictly needed to,
simply because it was easier to keep all that low level stuff in one set
of files.

Its a mistake to consider that the code one writes, is of the same ilk
as the code others write. Most of my programming has been at very low
level, hardware, OS, drivers, Bioses, comms code, a bi of commercial
applications, and database, but not that much till I came thisaway and
stared writing simple stuff for web sites. I mean really people make a
huge fuss over PHP, but its diddly squat compared to writing rom based
assembler to bootstrap a motherboard from cold. Its interpreted, so no
compile test debug cycles. Its block structured, so you don't have to
worry about trampling in the wrong bit of RAM, its not time critical bar
a few odd cases...basically you guys are just bored because you don't
have to work hard enough, so you spend your time arguing the niceties of
style ;-)

>

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[Message index]

		terminate a PHP script By: bob on Sat, 19 February 2011 21:56
		Re: terminate a PHP script By: Jerry Stuckle on Sat, 19 February 2011 21:59
		Re: terminate a PHP script By: The Natural Philosoph on Sun, 20 February 2011 00:38
		Re: terminate a PHP script By: Jerry Stuckle on Sun, 20 February 2011 01:04
		Re: terminate a PHP script By: me on Sun, 20 February 2011 02:07
		Re: terminate a PHP script By: Twayne on Thu, 24 February 2011 01:59
		Re: terminate a PHP script By: Jerry Stuckle on Thu, 24 February 2011 04:04
		Re: terminate a PHP script By: The Natural Philosoph on Thu, 24 February 2011 12:51
		Re: terminate a PHP script By: Twayne on Thu, 24 February 2011 17:26
		Re: terminate a PHP script By: The Natural Philosoph on Thu, 24 February 2011 17:51
		Re: terminate a PHP script By: Thomas 'PointedEars' on Sun, 20 February 2011 09:47
		Re: terminate a PHP script By: me on Sun, 20 February 2011 15:05
		Re: terminate a PHP script By: n00m on Mon, 21 February 2011 12:53
		Re: terminate a PHP script By: Jerry Stuckle on Mon, 21 February 2011 13:08
		Re: terminate a PHP script By: n00m on Mon, 21 February 2011 16:51
		Re: terminate a PHP script By: Denis McMahon on Mon, 21 February 2011 17:06
		Re: terminate a PHP script By: sheldonlg on Mon, 21 February 2011 17:23
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 00:28
		Re: terminate a PHP script By: sheldonlg on Tue, 22 February 2011 00:52
		Re: terminate a PHP script By: Jerry Stuckle on Tue, 22 February 2011 01:00
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 01:46
		Re: terminate a PHP script By: sheldonlg on Tue, 22 February 2011 02:08
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 03:55
		Re: terminate a PHP script By: sheldonlg on Tue, 22 February 2011 12:06
		Re: terminate a PHP script By: The Natural Philosoph on Wed, 23 February 2011 08:18
		Re: terminate a PHP script By: Tim Streater on Tue, 22 February 2011 17:18
		Re: terminate a PHP script By: sheldonlg on Tue, 22 February 2011 17:26
		Re: terminate a PHP script By: The Natural Philosoph on Wed, 23 February 2011 08:21
		Re: terminate a PHP script By: Jerry Stuckle on Mon, 21 February 2011 17:37
		Re: terminate a PHP script By: sheldonlg on Mon, 21 February 2011 17:53
		Re: terminate a PHP script By: n00m on Mon, 21 February 2011 18:01
		Re: terminate a PHP script By: Peter H. Coffin on Mon, 21 February 2011 19:07
		Re: terminate a PHP script By: Curtis Dyer on Tue, 22 February 2011 22:59
		Re: terminate a PHP script By: Tim Streater on Mon, 21 February 2011 18:04
		Re: terminate a PHP script By: sheldonlg on Mon, 21 February 2011 18:32
		Re: terminate a PHP script By: Tim Streater on Mon, 21 February 2011 18:50
		Re: terminate a PHP script By: Peter H. Coffin on Mon, 21 February 2011 19:09
		Re: terminate a PHP script By: Tim Streater on Mon, 21 February 2011 19:44
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 01:16
		Re: terminate a PHP script By: n00m on Tue, 22 February 2011 01:28
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 01:47
		Re: terminate a PHP script By: sheldonlg on Tue, 22 February 2011 02:10
		Re: terminate a PHP script By: n00m on Tue, 22 February 2011 02:45
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 01:15
		Re: terminate a PHP script By: sheldonlg on Tue, 22 February 2011 01:53
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 03:16
		Re: terminate a PHP script By: Tim Streater on Tue, 22 February 2011 17:01
		Re: terminate a PHP script By: sheldonlg on Tue, 22 February 2011 17:05
		Re: terminate a PHP script By: sheldonlg on Tue, 22 February 2011 17:07
		Re: terminate a PHP script By: Tim Streater on Tue, 22 February 2011 16:59
		Re: terminate a PHP script By: The Natural Philosoph on Wed, 23 February 2011 08:19
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 01:12
		Re: terminate a PHP script By: Tim Streater on Tue, 22 February 2011 17:04
		Re: terminate a PHP script By: n00m on Mon, 21 February 2011 18:54
		Re: terminate a PHP script By: Jerry Stuckle on Mon, 21 February 2011 19:39
		Re: terminate a PHP script By: sheldonlg on Mon, 21 February 2011 21:03
		Re: terminate a PHP script By: sheldonlg on Mon, 21 February 2011 21:06
		Re: terminate a PHP script By: n00m on Mon, 21 February 2011 21:46
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 01:24
		Re: terminate a PHP script By: sheldonlg on Tue, 22 February 2011 02:04
		Re: terminate a PHP script By: Jerry Stuckle on Tue, 22 February 2011 02:09
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 03:38
		Re: terminate a PHP script By: sheldonlg on Tue, 22 February 2011 11:54
		Re: terminate a PHP script By: The Natural Philosoph on Wed, 23 February 2011 08:15
		Re: terminate a PHP script By: sheldonlg on Wed, 23 February 2011 13:05
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 01:23
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 01:06
		Re: terminate a PHP script By: The Natural Philosoph on Tue, 22 February 2011 00:58

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