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[aprssig] Programming Language Advice

Ray Wells vk2tv at exemail.com.au
Sun Jan 18 03:40:02 UTC 2009


Thanks for all the additional replies. I think the only language I'm 
proficient in at the moment is profane, after all the syntax errors from 
perl :-)

My last serious attempt at a programming language was in 1982 with 
BASIC. Now you have an idea of where I stand.

However, when I get my teeth into something I'm usually determined to 
win, and I now have the ugliest scripts ever written, doing what I want 
to do. As I become more proficient in perl there will be a lot of 
tidying up. I couldn't get my head around converting compass points to 
degrees in perl - those darned syntax errors again - so I start with a 
shell script to snag the data with lynx, do a bit of cut and shut to 
extract the data I need, and then convert the compass points with 
"case". From the shell script I call my perl script and it does all the 
mathematics and output formatting. I run two scripts (two weather 
stations) every ten minutes from crontab to snag the info and upload to 
xastir.

As I said, the scripts are ugly but I do at least have a point from 
which I can make improvements.

Ray vk2tv

Jeff Brenton wrote:
> Hello Ray,
>
> RW> I'm seeking advice from members of the list as to which would be
> RW> the best programming language to use to massage a string of data
> RW> so that it's suitable to upload as aprs weather info.
>
> >From the standpoint of someone who has been programming in C for 20+
> years, and PHP for about 10, my advice is... If you're comfortable
> with Perl for part of it, why not use it for all of it?
>
> This is a case where string handling is "important", but trivial, so
> the strengths or weaknesses of any of the languages isn't a major
> factor. The frequency that data arrives and must be processed does not
> require blazing speed.
>
> What is a factor is if the data is being processed continuously, or if
> it's a "call for each string to be processed".
>
> If the program is called for each string to be processed, the overhead
> of loading an interpreter can be huge. PHP and Perl can be rather
> onerous in this regard. A compiled C program has a lot less overhead.
>
> If the program simply loops and translates each string as it is found,
> the interpreter overhead is a small, one-time "expense". ProgramMER
> efficiency becomes more important.
>
> I do a lot of data transformation work. I had one task that was
> originally written in C for efficiency, because it's translating
> virtually every byte of the input files, which can run tens of
> megabytes. A couple of years ago, an aberrant file file needed to be
> processed. Half-way through modifying the C program to handle the
> abberation, I realized that, for this one-time job, I'd just take the
> speed hit and do it in PHP. Program was done in 2 hours, instead of
> 20.
>
> That is when it struck me that the job is only run once per day, so
> who really cares if it takes 3 minutes to run, instead of 1? The
> normal program was replaced with a PHP version. Maintenance became
> much easier. The ability to "go with the flow" when changes in the
> input data occur went up.
>
> Go with whatever language YOU are more efficient in.
>
>   




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