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Full Discussion: checking wether an input is using letters of the alphabet
Top Forums UNIX for Dummies Questions & Answers checking wether an input is using letters of the alphabet Post 302338264 by mrtiller on Monday 27th of July 2009 11:27:12 AM
Old 07-27-2009
Code:
#!/bin/sh

while read LINE
do
        case "$LINE" in
        [A-Za-z]) echo "alpha";;
        *) echo "not alpha";;
        esac
done

 

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LEARN ABOUT MINIX

ximtoppm

ximtoppm(1)                                                   General Commands Manual                                                  ximtoppm(1)

NAME

       ximtoppm - convert an Xim file into a portable pixmap

SYNOPSIS

       ximtoppm [--alphaout={alpha-filename,-}] [ximfile]

DESCRIPTION

       Reads an Xim file as input.  Produces a portable pixmap as output.  The Xim toolkit is included in the contrib tree of the X.V11R4 release.

OPTIONS

       --alphaout=alpha-filename
              ximtoppm  creates  a PGM (portable graymap) file containing the alpha channel values in the input image.  If the input image doesn't
              contain an alpha channel, the alpha-filename file contains all zero (transparent) alpha values.  If you  don't  specify  --alphaout,
              ximtoppm does not generate an alpha file, and if the input image has an alpha channel, ximtoppm simply discards it.

              If you specify - as the filename, ximtoppm writes the alpha output to Standard Output and discards the image.

              Actually,  an  Xim  image  can contain an arbitrary fourth channel -- it need not be an Alpha channel.  ximtoppm extracts any fourth
              channel it finds as described above; it doesn't matter if it is an alpha channel or not.

              See pnmcomp(1) for one way to use the alpha output file.

       All options can be abbreviated to their shortest unique prefix.

SEE ALSO

       pnmcomp(1), ppm(5)

AUTHOR

       Copyright (C) 1991 by Jef Poskanzer.

                                                                   April 2, 2000                                                       ximtoppm(1)
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