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Full Discussion: getopts and a list argument
Top Forums Shell Programming and Scripting getopts and a list argument Post 302208519 by unSpawn on Tuesday 24th of June 2008 05:27:40 AM
Old 06-24-2008
Quote:
Originally Posted by duderonomy
I wonder why that is? What was I breaking?
The easiest way is make one function "old" style, one "new" style, 'set -vx', then compare output.


Quote:
Originally Posted by duderonomy
Hmmm... This makes me wonder if %SOME_LARGE_PERCENTAGE% of the existing code base in the world is a workaround for what the programmer did not understand.
I don't know the answer to that, but one example I can think of was KDE vs QT. In the past the KDE team did a lot of odd tweakage instead of using QT to its fullest. That changed though. Even if a programmer understands it all there's bound to be hundreds of ways to do something "better" (more efficient, more performant). Wrt scripting reading static guides like the ABS (again), reading fora like these and other peoples scripts helps, the rest is experimenting and "just" gaining experience. And as F/OSS shows, if things can be improved they will be.
 

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LEARN ABOUT MINIX

ppmtopgm

ppmtopgm(1)                                                   General Commands Manual                                                  ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and  pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

                                                                   10 April 2000                                                       ppmtopgm(1)
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