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Top Forums Shell Programming and Scripting Conversion from Upper Case to Lower Case Condition based Post 302537540 by Corona688 on Friday 8th of July 2011 12:51:15 PM
Old 07-08-2011
Quote:
Originally Posted by tsbiju
Is there a command that does edit in-place ?

Thanks
B-
Do you really want to edit in-place? If anything goes wrong you've destroyed your original, not a copy!

You can't just redirect into the same file you're reading from either, because you'd end up deleting the file before you even begin reading from it. Hence why this, and most shell utilities, don't edit in-place. Modifying the original is easy enough without that:
Code:
tr '[A-Z]' '[a-z]' < /export/home/oracle/TST/data.dat > /tmp/$$
cat /tmp/$$ > /export/home/oracle/TST/data.dat
rm /tmp/$$

'cat' is better than 'mv' for this because it won't ever alter data.dat's ownership or permissions.
 

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Hash::Case::Upper(3pm)					User Contributed Perl Documentation				    Hash::Case::Upper(3pm)

NAME
Hash::Case::Upper - native hash with enforced lower cased keys INHERITANCE
Hash::Case::Upper is a Hash::Case is a Tie::StdHash SYNOPSIS
use Hash::Case::Upper; tie my(%uchash), 'Hash::Case::Upper'; $uchash{StraNGeKeY} = 3; print keys %uchash; # STRANGEKEY DESCRIPTION
Hash::Case::Upper extends Hash::Case, which lets you play various trics with hash keys. In this implementation, the fake hash is case insensitive and the keys stored in upper-case. METHODS
Constructors $obj->addHashData(HASH) See "Constructors" in Hash::Case $obj->addPairs(PAIRS) See "Constructors" in Hash::Case $obj->setHash(HASH) See "Constructors" in Hash::Case tie(HASH, 'Hash::Case::Upper', [VALUES,] OPTIONS) Define HASH to have only upper cased keys. The hash is initialized with the VALUES, specified as ref-array or ref-hash. Currently, there are no OPTIONS defined. SEE ALSO
This module is part of Hash-Case distribution version 1.02, built on March 09, 2012. Website: http://perl.overmeer.net/hash-case/ LICENSE
Copyrights 2002-2003,2007-2012 by Mark Overmeer. For other contributors see ChangeLog. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See http://www.perl.com/perl/misc/Artistic.html perl v5.14.2 2012-03-09 Hash::Case::Upper(3pm)
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