How can i search value from xml file such as I want to find from
*pubdate and
return **biblioentry
Please give me some source code for further study
**
*Thank You
Artit S.
http://www.rubybox.net (Thai Language)
Artit S. wrote:
How can i search value from xml file such as I want to find from
*pubdate and return **biblioentry
http://www.germane-software.com/software/rexml/
robert
You’ll propably want to use REXML and XPath:
require ‘rexml/document’
require ‘rexml/xpath’
include REXML
bibliography = Document.new( ARGV[0] )
XPath.each( bibliography, “/biblioentry[pubdate > 1993]”) do
|biblioentry|
do something with biblioentry here
end
Not entirely sure if that works, as the PC I’m on doesnt have Ruby
installed 
Scott
Artit S. wrote:
<firstname>Godfrey</firstname> <firstname>Geoffrey</firstname> <firstname>Sydney</firstname> <pubdate>1984</pubdate> <pubdate>1988</pubdate> </biblioentry>
class String
def xtag(s)
scan( %r! ( < #{s} [^>]* > ) ( .*? ) </ #{s} > !mx )
end
end
gets(nil).xtag(“biblioentry”).each { |tag,data|
if data.xtag(“pubdate”)[0][1] > “1984”
print tag, data, “\n”
end
}
Christian N. wrote:
print tag, data, "\n"end
}I hope you are joking…
I hope you’re joking.
Artit S. wrote:
<firstname>Godfrey</firstname> <surname>Vesey</surname> </author> <title>Personal Identity: A Philosophical Analysis</title> <publisher> <publishername>Cornell University Press</publishername> </publisher> <pubdate>1977</pubdate>
class String
def xtag(s)
scan( %r! < #{s} (?: \s+ ( [^>]* ) )? >
( .? ) </ #{s} > !mx ).
map{ |attr, data| h = { }
if attr
attr.scan( %r! ( \S+ ) = " ( [^"] ) " !x ){ |k,v|
h[k] = v }
end
[ h, data ]
}
end
end
gets(nil).xtag(“biblioentry”).each { |attr,data|
if data.xtag(“pubdate”)[0][1] > “1984”
print attr[“id”], data, “\n”
end
}
William J. wrote:
class String
def xtag(s)
endgets(nil).xtag(“biblioentry”).each { |attr,data|
}
Please stop. To the OP, use rexml.
Artit S. wrote:
<firstname>Godfrey</firstname> <surname>Vesey</surname> </author> <title>Personal Identity: A Philosophical Analysis</title> <publisher> <publishername>Cornell University Press</publishername> </publisher> <pubdate>1977</pubdate>
class String
def xtag(s)
scan( %r!
< #{s} (?: \s+ ( [^>]* ) )? / >
|
< #{s} (?: \s+ ( [^>]* ) )? >
( .? ) </ #{s} >
!mx ).
map{ |unpaired, attr, data| h = { }
attr = ( unpaired || attr )
if attr
attr.scan( %r! ( \S+ ) = " ( [^"] ) " !x ){ |k,v|
h[k] = v }
end
[ h, data ]
}
end
def xshow( depth=0 )
text = “”
split( /<([^>]*)>/ ).each_with_index{ |s,i|
if 0 == i % 2
text = s.strip
else
indent = " " * ( depth * 2 )
case
when s[0,1] == “/”
depth -= 1
puts text.map{|x| indent + x.strip } if text != “”
when s[-1,1] == “/”
puts indent + s
else
puts indent + s
depth += 1
end
end
}
end
end
gets(nil).xtag(“biblioentry”).each { |attr,data|
if data.xtag(“pubdate”)[0][1] > “1997”
puts attr[“id”]
data.xshow( 1 )
end
}
Output:
FHIW13C-1298-4
author
firstname
Brian
surname
Garrett
title
Personal Identity and Self-Consciousness
publisher
publishername
Routledge
pubdate
1998
FHIW13CX-1202-1
author
firstname
John
surname
Perry
title
Identity, Personal Identity, and the Self
publisher
publishername
Hackett
pubdate
2002
Artit S. wrote:
<firstname>Godfrey</firstname> <surname>Vesey</surname> </author> <title>Personal Identity: A Philosophical Analysis</title> <publisher> <publishername>Cornell University Press</publishername> </publisher> <pubdate>1977</pubdate>
class String
def xtag(s)
scan( %r! < #{s} (?: \s+ ( [^>]* ) )? >
( .? ) </ #{s} > !mx ).
map{ |attr, data| h = { }
if attr
attr.scan( %r! ( \S+ ) = " ( [^"] ) " !x ){ |k,v|
h[k] = v }
end
[ h, data ]
}
end
end
gets(nil).xtag(“biblioentry”).each { |attr,data|
if data.xtag(“pubdate”)[0][1] > “1984”
print attr[“id”], data, “\n”
end
}
I want to use rexml or any library ,please
thankz
On 2/20/06, Artit S. [email protected] wrote:
Basil Blackwell Penguin http://www.rubybox.net (Thai Language)<biblioentry id="FHIW13C-1234">
–
Artit S.
http://www.rubybox.net (Thai Language)
On 2/21/06, Ross B. [email protected] wrote:
(Also, REXML does support XPath, so you should be able to modify the
above to work with that. Just to be sure, I tried it 100 times over:XPath
user system total realrexml 9.840000 0.080000 9.920000 ( 10.046963)
libxml2 0.090000 0.000000 0.090000 ( 0.139592)
Every time I’ve tried to use REXML for something I’ve found it to be
incredibly slow and painful on large files. Usually I start with
REXML, get annoyed, and then install QuiXML
(http://quixml.rubyforge.org/). Though it doesn’t have bells and
whistles, it’s a heck of a lot faster. Anyhow, I’m certainly looking
forward to your libxml2 bindings!
-Pawel
On Tue, 2006-02-21 at 16:17 +0900, Artit S. wrote:
I want to use rexml or any library ,please
thankz
As others say, for now REXML is probably the way to go, but very soon
now you’ll be able to use Libxml2 also if things keep going to plan over
here.
require 'xml/libxml'
d = XML::Parser.file('test.xml').parse
p d.find('//biblioentry[pubdate = 1977]').to_a
If you want to try it before we get to release go to CVS:
http://rubyforge.org/scm/?group_id=494
(Also, REXML does support XPath, so you should be able to modify the
above to work with that. Just to be sure, I tried it 100 times over:
XPath
user system total real
rexml 9.840000 0.080000 9.920000 ( 10.046963)
libxml2 0.090000 0.000000 0.090000 ( 0.139592)
Christian N. wrote:
print tag, data, "\n"end
}I hope you are joking…
Actually, in real-world usage, Mark Pilgrim’s Python Feed Parser[0]
falls back to regular expressions to get the data required if the XML is
not well-formed.
Admittedly this is a real problem for RSS hackers, less so with other
XML messages, but the approach does have merit if (a) you can’t
guarantee well-formedness and (b) you absolutely have to have the data.
-dave
“William J.” [email protected] writes:
<author>class String
}
Still doesn’t support namespaces, entities and CDATA…
(Or nested tags like.)