Re: Question on finding the number of defined array elements.

Chris Erskine · 2009-01-23T15:16:42-08:00

One of the things that I would do with pointers was for strings with delimiters, you would null out the delimiter and by using pointers, you could point to the start of the string without having to

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Re: Question on finding the number of defined array elements.

Chris Erskine #95744 One of the things that I would do with pointers was for strings with delimiters, you would null out the delimiter and by using pointers, you could point to the start of the string without having to copy the data into new fields. There are a number of other uses that they can be used for but that was the one I was thinking about when Joseph talked about breaking up the XML files. Chris toggle quoted message Show quoted text -----Original Message----- From: Crestron@... [mailto:Crestron@...] On Behalf Of Lincoln King-Cliby Sent: Friday, January 23, 2009 4:08 PM To: 'Crestron@...' Subject: RE: [Crestron] Re: Question on finding the number of defined array elements. Isn't' that why you pass strings by reference unless you have a good reason for passing them by value (or you're dealing with one of the S+ quirks that won't allow a passing byref, like IIRC, a serial input)? Or would pointers open up another advantageous option that I'm forgetting at the moment (it's been far too long since the last time I played with a language the formally supported pointers :(... but they are uber cool. Took me most of my first semester of AP CompSci in high school to figure the point out, but after that... wow!) Lincoln -- Lincoln King-Cliby, CTS Applications Engineer ControlWorks Consulting, LLC V: 440.729.4640 x1107 F: 440.729.0884 I: Crestron Authorized Independent Programmer -----Original Message----- From: Crestron@... [mailto:Crestron@...] On Behalf Of Chris Erskine Sent: Friday, January 23, 2009 11:12 AM To: Crestron@... Subject: RE: [Crestron] Re: Question on finding the number of defined array elements. I agree that not only would your code be more compact but more efficient since you would not have to be copying data around all over. On the other hand, pointers would cause so much more problems in the code that systems would be crashing all over. Crestron would require better TB personnel and better tools since you would need a debugger that would let you step through the S+ code when it was running. Chris -----Original Message----- From: Crestron@... [mailto:Crestron@...] On Behalf Of Joseph K. Vossen Sent: Friday, January 23, 2009 9:06 AM To: Crestron@... Subject: Re: [Crestron] Re: Question on finding the number of defined array elements. agreed...in my non-Crestron circle of travels in the past, I have found that a good understanding of pointers separates the good programmers from the great ones. And then when you jump into function pointers, that opens up a whole new world of fun..... having pointers in SIMPL+ would benefit, for example, those tasks that perform a lot of parsing, such as busting up XML pages. Sure one can do it now with what is available, I just think the code would be a bit more compact, IMHO -----Original Message----- From: fooguy89 <fooguy89@...> Sent: Jan 23, 2009 10:53 AM To: Crestron@... Subject: [Crestron] Re: Question on finding the number of defined array elements. I'm pretty sure the reason Crestron doesn't do Pointers is because of support. They tend to perform a lot of support that doesn't seem to be "their problem" - issues that are clearly programming mistakes, but they do try to help resolve them (I know people knock TB for a lot, but I mean they do try to be helpful if you get the right folks). Can you just imagine the chaos of newbies trying to use pointers, overwriting memory, blah blah blah, and Crestron trying to suck it up and fix it/teach them? As a professional programmer, sure, it would be great to have, but I can definitely see why many things are limited. Sometimes I don't understand the need to try to fix and assist with blatant programming problems (If you were to call microsoft and whine about how your system crashed because you did a NULL pointer access or overwrite the bounds of your array, they'd probably just be like "Uh....GO FIND AND FIX IT YOURSELF!!") --- In Crestron@..., Joseph K. Vossen <jkv@...> wrote: the semi-colon after the if() is a valid statement from the parser's point of view; it just doesn't do what you want/expect here is a simple example of how that is useful; the following 'C' code copies a NULL-terminated string, where 'p' points to the destination and 'q' points to the source:. The while() terminates when the NULL terminating byte is hit. while (p++ = q++) ; // <- note lone semi-colon ya' just gotta love pointers...sure wish SIMPL+ had 'em....... On Friday 23 January 2009 12:33 am, you wrote: I would have expected to see a compiler error on the fatal ; at the end of an IF statement. True, but I always put them in so that if I do add another line I don't mess up the execution order/nesting. (Didn't see the ; - fatal, but a trace should have shown 10 outputs rather than just 1.) Lindsay ------------------------------------ Check out the Files area for useful modules, documents, and drivers. A contact list of Crestron dealers and programmers can be found in the Database area. Yahoo! Groups Links ------------------------------------ Check out the Files area for useful modules, documents, and drivers. A contact list of Crestron dealers and programmers can be found in the Database area. Yahoo! Groups Links ------------------------------------ Check out the Files area for useful modules, documents, and drivers. A contact list of Crestron dealers and programmers can be found in the Database area. Yahoo! Groups Links

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Re: Question on finding the number of defined array elements.