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UNIX for Beginners Questions & Answers
Question about WCHAN values
Post 303044507 by nezabudka on Monday 24th of February 2020 02:48:09 PM
02-24-2020
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Hello,
Do you have any idea why the below sed command is also replacing the value of "PARAMETER2" instead of just "PARAMETER" in file1 ?
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% new_value=2
% cat file1
PARAMETER=1
PARAMETER2=1
% cat file1 | sed s/*$/${new_value}/1
PARAMETER=2
PARAMETER2=2
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LEARN ABOUT MOJAVE
ppi::token::quote5.18
PPI::Token::Quote(3) User Contributed Perl Documentation PPI::Token::Quote(3) NAME
PPI::Token::Quote - String quote abstract base class INHERITANCE
PPI::Token::Quote isa PPI::Token isa PPI::Element DESCRIPTION
The "PPI::Token::Quote" class is never instantiated, and simply provides a common abstract base class for the four quote classes. In PPI, a "quote" is limited to only the quote-like things that themselves directly represent a string. (although this includes double quotes with interpolated elements inside them). The subclasses of "PPI::Token::Quote" are: '' - PPI::Token::Quote::Single "q{}" - PPI::Token::Quote::Literal "" - PPI::Token::Quote::Double "qq{}" - PPI::Token::Quote::Interpolate The names are hopefully obvious enough not to have to explain what each class is here. See their respective pages for more details. Please note that although the here-doc does represent a literal string, it is such a nasty piece of work that in PPI it is given the honor of its own token class (PPI::Token::HereDoc). METHODS
string The "string" method is provided by all four ::Quote classes. It won't get you the actual literal Perl value, but it will strip off the wrapping of the quotes. # The following all return foo from the ->string method 'foo' "foo" q{foo} qq <foo> literal The "literal" method is provided by ::Quote:Literal and ::Quote::Single. This returns the value of the string as Perl sees it: without the quote marks and with "\" and "'" resolved to "" and "'". The "literal" method is not implemented by ::Quote::Double or ::Quote::Interpolate yet. SUPPORT
See the support section in the main module. AUTHOR
Adam Kennedy <adamk@cpan.org> COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of the license can be found in the LICENSE file included with this module. perl v5.18.2 2011-02-25 PPI::Token::Quote(3)