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Full Discussion: ksh pattern matching
Top Forums Shell Programming and Scripting ksh pattern matching Post 302166031 by fpmurphy on Sunday 10th of February 2008 12:13:28 PM
Old 02-10-2008
I assume you are talking about section 4.3 (String Operators) of LTKS

Code:
#!/usr/bin/ksh93

echo ${.sh.version}
var='A regular expressions test'

echo "1>  //e/#"
echo ${var//e/#}
echo "2>  //[^e]/#"
echo ${var//[^e]/#}
echo "3>  //+(e)/#"
echo ${var//+(e)/#}
echo "4>  //-(e)/#"
echo ${var//-(e)/#}
echo "5>  //?(e)/#"
echo ${var//?(e)/#}
echo "6>  //*(e)/#"
echo ${var//*(e)/#}
echo "7>  //!(e)/#"
echo ${var//!(e)/#}

Gives the following output

Code:
Version M 1993-12-28 s+
1>  //e/#
A r#gular #xpr#ssions t#st
2>  //[^e]/#
###e######e###e########e##
3>  //+(e)/#
A r#gular #xpr#ssions t#st
4>  //-(e)/#
A regular expressions test
5>  //?(e)/#
###########################
6>  //*(e)/#
###########################
7>  //!(e)/#
#

Interesting! I am not sure what is going on.

Last edited by fpmurphy; 02-10-2008 at 01:27 PM..
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.10 3 Aug 1994 echo(1B)
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