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Full Discussion: echo the NAME of the variable
Top Forums Shell Programming and Scripting echo the NAME of the variable Post 302630245 by neutronscott on Wednesday 25th of April 2012 02:49:24 PM
Old 04-25-2012
Did you see my post update about indirection? In this way you actually pass variables names rather than values, and use the special ${!} notation to expand the value of the variable inside the variable ...

edit: oh nevermind, saw your title "hundreds of vars"... indeed an array is the way to go. target is bash3 or bash4? with bash3 you'd need two separate arrays, one would keep the "key" and the other the "value",
in bash4 you have associative arrays, such that array[key]=val. example for bash3:

Code:
[mute@geek ~]$ keys=(varA varB varC varD)
[mute@geek ~]$ vals=(AAA1 BBB1 CCC1 DDD1)
[mute@geek ~]$ for i in "${!keys[@]}"; do echo "${keys[i]} = ${vals[i]}"; done
varA = AAA1
varB = BBB1
varC = CCC1
varD = DDD1

Last edited by neutronscott; 04-25-2012 at 03:55 PM..
 

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LEARN ABOUT ULTRIX

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
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