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Re^2: Replace XML tag names.

by Jenda (Abbot)
on May 04, 2010 at 11:25 UTC ( #838285=note: print w/ replies, xml ) Need Help??


in reply to Re: Replace XML tag names.
in thread Replace XML tag names.

I think you should also handle the <![CDATA[...]]> sections.

$xml =~ s{(?:(<!\[CDATA\[.*?\]\]>)|(<[^\s?!>]+))}{ $1 or do {(my $tagname = $2 ) =~ tr/.//d;$tagname;} }seg; # or ... sligthly more efficient for XMLs with most tags without the d +ots $xml =~ s{(?:(<!\[CDATA\[.*?\]\]>)|(<[^\s?!>\.]+\.[^\s?!>]+))}{ $1 or do {(my $tagname = $2 ) =~ tr/.//d;$tagname;} }seg; # and now even more efficient thanks to moving the &lt; outside the or $xml =~ s{<(?:(!\[CDATA\[.*?\]\]>)|(<[^\s?!>\.]+\.[^\s?!>]+))}{ '<'. ($1 or do {(my $tagname = $2 ) =~ tr/.//d;$tagname;} ) }seg;
Benchmark:
my $XML = <<'__XML__'; <?xml version="1.0"?> <TOP> <SUB> <![CDATA[<SOME.OTHER.TYPE>BLAH</SOME.OTHER.TYPE> ]]> <THIS>STUFF</THIS> <SOME.TYPE>T</SOME.TYPE> <SOME.OTHER.TYPE>BLAH</SOME.OTHER.TYPE> <![CDATA[<SOME.OTHER.TYPE>BLAH</SOME.OTHER.TYPE> ]]> </SUB> </TOP> __XML__ use Benchmark; sub one { my $xml = $XML; $xml =~ s{(?:(<!\[CDATA\[.*?\]\]>)|(<[^\s?!>]+))}{ $1 or do {(my $ +tagname = $2 ) =~ tr/.//d;$tagname;} }seg; $xml =~ s{(?:(<!\[CDATA\[.*?\]\]>)|(<[^\s?!>]+))}{ $1 or do {(my $ +tagname = $2 ) =~ tr/.//d;$tagname;} }seg; $xml =~ s{(?:(<!\[CDATA\[.*?\]\]>)|(<[^\s?!>]+))}{ $1 or do {(my $ +tagname = $2 ) =~ tr/.//d;$tagname;} }seg; return; } sub two { my $xml = $XML; $xml =~ s{(?:(<!\[CDATA\[.*?\]\]>)|(<[^\s?!>\.]+\.[^\s?!>]+))}{ $1 + or do {(my $tagname = $2 ) =~ tr/.//d;$tagname;} }seg; $xml =~ s{(?:(<!\[CDATA\[.*?\]\]>)|(<[^\s?!>\.]+\.[^\s?!>]+))}{ $1 + or do {(my $tagname = $2 ) =~ tr/.//d;$tagname;} }seg; $xml =~ s{(?:(<!\[CDATA\[.*?\]\]>)|(<[^\s?!>\.]+\.[^\s?!>]+))}{ $1 + or do {(my $tagname = $2 ) =~ tr/.//d;$tagname;} }seg; return; } sub three { my $xml = $XML; $xml =~ s{<(?:(!\[CDATA\[.*?\]\]>)|(<[^\s?!>\.]+\.[^\s?!>]+))}{ '< +'. ($1 or do {(my $tagname = $2 ) =~ tr/.//d;$tagname;} ) }seg; $xml =~ s{<(?:(!\[CDATA\[.*?\]\]>)|(<[^\s?!>\.]+\.[^\s?!>]+))}{ '< +'. ($1 or do {(my $tagname = $2 ) =~ tr/.//d;$tagname;} ) }seg; $xml =~ s{<(?:(!\[CDATA\[.*?\]\]>)|(<[^\s?!>\.]+\.[^\s?!>]+))}{ '< +'. ($1 or do {(my $tagname = $2 ) =~ tr/.//d;$tagname;} ) }seg; return; } sub four { my $xml = $XML; $xml =~ s{<(?:(!\[CDATA\[.*?\]\]>)|(<[^\s?!>]+))}{ '<'. ($1 or do +{(my $tagname = $2 ) =~ tr/.//d;$tagname;} ) }seg; $xml =~ s{<(?:(!\[CDATA\[.*?\]\]>)|(<[^\s?!>]+))}{ '<'. ($1 or do +{(my $tagname = $2 ) =~ tr/.//d;$tagname;} ) }seg; $xml =~ s{<(?:(!\[CDATA\[.*?\]\]>)|(<[^\s?!>]+))}{ '<'. ($1 or do +{(my $tagname = $2 ) =~ tr/.//d;$tagname;} ) }seg; return; } timethese( 100000, { one => \&one, two => \&two, three => \&three, four => \&four, }); __END__ Benchmark: timing 100000 iterations of four, one, three, two... four: 2 wallclock secs ( 1.89 usr + 0.00 sys = 1.89 CPU) @ 52 +882.07/s (n=100000) one: 10 wallclock secs ( 9.53 usr + 0.00 sys = 9.53 CPU) @ 10 +492.08/s (n=100000) three: 2 wallclock secs ( 1.86 usr + 0.00 sys = 1.86 CPU) @ 53 +792.36/s (n=100000) two: 6 wallclock secs ( 6.27 usr + 0.00 sys = 6.27 CPU) @ 15 +959.14/s (n=100000)

Jenda
Enoch was right!
Enjoy the last years of Rome.


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