Top Forums Shell Programming and Scripting For loop statements order of operations Post 303023768 by Scott on Friday 21st of September 2018 09:59:27 PM
Old 09-21-2018
I don't think that's what I said at all. If you are reading the file sequentially, you'll always get whatever color comes first, regardless of the order in which you process it.

Or maybe I'm not grasping your question. It seems straight forward, but it is late, and I maybe need some sleep!

$ cat file

for color in line; do
  [ "$color" = red ] && echo "I found red"
  [ "$color" = blue ] && echo "I found blue"
done < file

I found red
I found blue

for color in line; do
  [ "$color" = blue ] && echo "I found blue"
  [ "$color" = red ] && echo "I found red"
done < file

I found red
I found blue


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ppmdither(1)						      General Commands Manual						      ppmdither(1)

ppmdither - ordered dither for color images SYNOPSIS
ppmdither [-dim power] [-red shades] [-green shades] [-blue shades] [ppmfile] DESCRIPTION
Reads a portable pixmap as input, and applies dithering to it to reduce the number of colors used down to the specified number of shades for each primary. The default number of shades is red=5, green=9, blue=5, for a total of 225 colors. To convert the image to a binary rgb format suitable for color printers, use -red 2 -green 2 -blue 2. OPTIONS
-dim power The size of the dithering matrix. The dithering matrix is a square whose dimension is a power of 2. power is that power of 2. The default is 4, for a 16 by 16 matrix. -red shades The number of red shades to be used, including black; minimum of 2. -green shades The number of green shades to be used, including black; minimum of 2. -blue shades The number of blue shades to be used, including black; minimum of 2. SEE ALSO
pnmdepth(1), ppmquant(1), ppm(5) AUTHOR
Copyright (C) 1991 by Christos Zoulas. 14 July 1991 ppmdither(1)

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