Re: Web apps on the AS/400

From: Leif Svalgaard <leif@leif.org>
> From: Nathan M. Andelin <nathanma@haaga.com>
> > >Java is better for vector and string manipulation than RPG...
> > I don't disagree with the above statement.  It's just that it's ealily
> > remedied
> 
> These blanket statements are hard to accept at face value.
> The only way to verify this is to solve the same string problem
> in different languages and them to time the following things:
> 1) how long did it take to solve the problem
> 2) how fast does it run. (do it 100,000 times)
> 
> So here is a sample problem:
> 
> Given a string of length 50, move a shorter string to it,
> e.g. "test string", finally right-justify the string, so that it
> now holds:
> "                                       test string"
> The shorter string is not known at compile time.
> 
> Once we have a solution to that in several languages
> we can make meaningful comparisons. If the language 
> or a subroutine library already has a function that solves
> the problem, you are not allowed to use it.
> This later restriction is somewhat dubious: imagine
> you had a language that had a built-in solution to
> every problem your are likely to encounter, it is
> hard to disqualify using it.
> 

Here is one solution (in MI on a 150 box):
time to write: 4 min
time to run 100,000 times through the loop: 1.3 secs  
code:
DCL DD THE-STRING  CHAR(50);
DCL DD THE-SHORTER CHAR(50);
DCL DD SIZE  BIN(2);
DCL DD START BIN(2);
DCL DD NBR   BIN(4);
    CPYBLAP     THE-SHORTER, "TEST STRING", " ";
    CPYNV       NBR, 100000;
AGAIN:
    TRIML       SIZE,  THE-SHORTER, " ";
    CMPNV(B)    SIZE,  0/HI(=+2);
    CPYNV       SIZE,  50;:
    SUBN        START, 51, SIZE;
    CPYBRAP     THE-STRING (START:SIZE), THE-SHORTER, " ";
    SUBN(SB)    NBR, 1/POS(AGAIN);

    RTX      *;



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