Understanding Post: 65416

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Need your help in understanding this

Hi, I found this in a script and I would like to know how this works Code is here: # var1=PART1_PART2 # var2=${var1##*_} # echo $var2 PART2 I'm wondering how ##* makes the Shell to understand to pick up the last value from the given.

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pt_peg_from_container

pt::peg::from::container(3tcl)					   Parser Tools 				    pt::peg::from::container(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME

       pt::peg::from::container - PEG Conversion. From CONTAINER format

SYNOPSIS

       package require Tcl  8.5

_________________________________________________________________

DESCRIPTION

       Are  you  lost  ?  Do you have trouble understanding this document ?  In that case please read the overview provided by the Introduction to
       Parser Tools. This document is the entrypoint to the whole system the current package is a part of.

       This package does not exist.  There is no need for it.  The CONTAINER format for parsing expression grammars is a piece of Tcl code  which,
       then sourced, provides a class whose instances have the grammar we wish to import loaded.  Another way of looking at this is, the CONTAINER
       output is its own import package.

BUGS, IDEAS, FEEDBACK
       This document, and the package it describes, will undoubtedly contain bugs and other problems.  Please report such in the  category  pt	of
       the  Tcllib  SF	Trackers [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may have for
       either package and/or documentation.

KEYWORDS

       EBNF, LL(k), PEG, TDPL, context-free languages, expression, grammar, matching, parser, parsing expression, parsing expression grammar, push
       down automaton, recursive descent, state, top-down parsing languages, transducer

CATEGORY

       Parsing and Grammars

COPYRIGHT

       Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>

pt									 0					    pt::peg::from::container(3tcl)

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Discussion started by: taiL

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Discussion started by: suvenduperl

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understanding {%/*}/

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