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Top Forums UNIX for Beginners Questions & Answers awk Associative Array and/or Referring to Field by String (Nonconstant String Value) Post 303029885 by Scrutinizer on Saturday 2nd of February 2019 08:14:21 AM
Old 02-02-2019
Note that the behavior with the default FS=" " to skip and delimit using both blanks and newlines, used to be different in older Posix implementations, where blanks were used, but not newlines. mawk and gawk still support this older POSIX defined behavior, with special compatibility command line options.

compare:
Code:
$> echo "1.   222   333.
444.   555.666" | mawk '{print $1}' RS=.
1
222
444
555
666
$>

to
Code:
$> echo "1.   222   333.
444.   555.666" | mawk -W posix_space '{print $1}' RS=.
1
222

444
555
666

$>

Likewise for gawk with the --posix option.

Last edited by Scrutinizer; 02-02-2019 at 10:13 AM..
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Quote(3pm)						User Contributed Perl Documentation						Quote(3pm)

NAME
XML::Quote - XML quote/dequote functions SYNOPSIS
use strict; use XML::Quote qw(:all); my $str=q{666 > 444 & "apple" < 'earth'}; print xml_quote($str)," "; # 666 &gt; 444 &amp; &quot;apple&quot; &lt; &apos;earth&apos; my $str2=q{666 &gt; 444 &amp; &quot;apple&quot; &lt; &apos;earth&apos;}; print xml_dequote($str2)," "; # 666 > 444 & "apple" < 'earth' my $str3=q{666 > 444 & "apple" < 'earth'}; print xml_quote_min($str3)," "; # 666 > 444 &amp; &quot;apple&quot; &lt; 'earth' DESCRIPTION
This module provides functions to quote/dequote strings in "xml"-way. All functions are written in XS and are very fast; they correctly process utf8, tied, overloaded variables and all the rest of perl "magic". FUNCTIONS
$quoted = xml_quote($str); This function replaces all occurences of symbols '&', '"', ''', '>', '<' to '&amp;', '&quot;', '&apos;', '&gt;', '&lt;' respectively. Returns quoted string or undef if $str is undef. $dequoted = xml_dequote($str); This function replaces all occurences of '&amp;', '&quot;', '&apos;', '&gt;', '&lt;' to '&', '"', ''', '>', '<' respectively. All other entities (for example &nbsp;) will not be touched. Returns dequoted string or undef if $str is undef. $quoted = xml_quote_min($str); This function replaces all occurences of symbols '&', '"', '<' to '&amp;', '&quot;', '&lt;' respectively. Symbols ''' and '>' are not replaced. Returns quoted string or undef if $str is undef. EXPORT
xml_quote(), xml_dequote() are exported as default. PERFORMANCE
You can use t/benchmark.pl to test the perfomance. Here is the result on my P4 box. Benchmark: timing 1000000 iterations of perl quote, xs quote... perl quote: 108 wallclock secs (88.08 usr + 0.01 sys = 88.09 CPU) @ 11351.64/s (n=1000000) xs quote: 20 wallclock secs (16.78 usr + 0.00 sys = 16.78 CPU) @ 59591.20/s (n=1000000) Benchmark: timing 1000000 iterations of perl dequote, xs dequote... perl dequote: 106 wallclock secs (85.22 usr + 0.09 sys = 85.31 CPU) @ 11721.54/s (n=1000000) xs dequote: 19 wallclock secs (15.92 usr + 0.02 sys = 15.94 CPU) @ 62743.13/s (n=1000000) AUTHOR
Sergey Skvortsov <skv@protey.ru> SEE ALSO
http://www.w3.org/TR/REC-xml <http://www.w3.org/TR/REC-xml>, perlre COPYRIGHT
Copyright 2003 Sergey Skvortsov <skv@protey.ru>. All rights reserved. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2008-06-26 Quote(3pm)
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