comp.lang.ruby Google Group

Re: Using Nokogiri

bbxx789_0...@yahoo.com (7stud --) — Mon, 09 Nov 2009 05:37:30 UT

I was wondering if you could answer some xpath questions? I would think
that in this xpath:
div[@class="sectionHeaderText" ]/following-sibling::text()[2]
the part:
div[@class="sectionHeaderText" ]/following-sibling
would be the <b> tag. Then:
div[@class="sectionHeaderText" ]/following-sibling::text()

Re: Ruby doesn't implement x++ for Fixnum's because ???

t...@medioh.com (Tony Arcieri) — Mon, 09 Nov 2009 05:15:33 UT

[Note: parts of this message were removed to make it a legal post.]
You will find the answer to these edge cases varies. Fortunately they are
edge cases...
Really?
As someone intimately familiar with the expression/statement barrier, I
really don't see the issue...
Ruby is a pure expression-based language (and I see you acknowledge that

Re: Ruby doesn't implement x++ for Fixnum's because ???

vj...@path.berkeley.edu (Joel VanderWerf) — Mon, 09 Nov 2009 04:54:25 UT

The only sane answer is to do what C does, as far as parsing. But the
deeper problem in ruby is what do pre- and post- really mean? In C there
are expressions and there are other constructs, so we can define natural
boundaries for pre and post in terms of expressions. In ruby we have
mostly expressions. So the hard questions are "before what?" and "after

Re: FileString - request for comments

vj...@path.berkeley.edu (Joel VanderWerf) — Mon, 09 Nov 2009 04:05:24 UT

What would the advantage over mmap[1] be? FileString is pure ruby
(right?) and hence more portable, but probably mmap is much more
efficient? Any other tradeoffs?
[1] [link] looks like this project of Guy
Decoux's has been recently adopted by knu: [link].

Re: Ruby doesn't implement x++ for Fixnum's because ???

t...@medioh.com (Tony Arcieri) — Mon, 09 Nov 2009 04:00:31 UT

[Note: parts of this message were removed to make it a legal post.]
Assuredly it would require changes to the parser, as "++" presently
lexes/parses as "plus (unary+ value)", and that's not to mention how it
parses in method definitions. The resulting operation is equivalent to
binary +, unless you're using something like

Re: Ruby doesn't implement x++ for Fixnum's because ???

t...@medioh.com (Tony Arcieri) — Mon, 09 Nov 2009 03:51:50 UT

[Note: parts of this message were removed to make it a legal post.]
My bad, it will serve as a reminder to double check my work before posting

Re: Ruby doesn't implement x++ for Fixnum's because ???

gsincl...@gmail.com (Gavin Sinclair) — Mon, 09 Nov 2009 03:48:25 UT

If implementing ++ requires changes to the parser, that seems like a
pretty technical limitation to me! :)
Matter of interpretation?
BTW in all your posts on the topic, you don't seem to address pre-
increment vs post-incrememt. (Forgive me if I'm wrong.) If Ruby
implemented ++ and didn't address that, it wouldn't be C or C++

Re: Can Ruby print out time difference (duration) readily?

phr...@mac.com (Phrogz) — Mon, 09 Nov 2009 03:46:43 UT

This old thread discusses a similar topic.
[link]
Note that durations expressed in any unit greater than weeks (months,
years, etc.) are going to give you problems.

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Re: FileString - request for comments

ja...@graysoftinc.com (James Edward Gray II) — Mon, 09 Nov 2009 03:37:17 UT

Interesting choice to use a String. I used Tie::File a couple of
times in Perl code. It works as an Array instead:
[link]
James Edward Gray II

Re: Ruby doesn't implement x++ for Fixnum's because ???

phr...@mac.com (Phrogz) — Mon, 09 Nov 2009 03:37:00 UT

Dude, you just about gave me a heart attack. Phewsh - sanity is
restored.

Re: Ruby doesn't implement x++ for Fixnum's because ???

t...@medioh.com (Tony Arcieri) — Mon, 09 Nov 2009 03:11:12 UT

[Note: parts of this message were removed to make it a legal post.]
I still find this most appropriate:
[link]

Re: Ruby doesn't implement x++ for Fixnum's because ???

t...@medioh.com (Tony Arcieri) — Mon, 09 Nov 2009 02:40:15 UT

[Note: parts of this message were removed to make it a legal post.]
I read and responded to them. Was there something about my responses you
didn't like, aside from my initial confusion with a dangling method from a
previously defined class? :)

Re: Using Nokogiri

m...@thomaszone.com (Mark Thomas) — Mon, 09 Nov 2009 02:19:34 UT

This should get what you want:
prefix = '//div[@class="sectionHeaderTe xt"]/following-sibling::'
xpaths = {
:name => "#{prefix}b/text()",
:addr => "#{prefix}text()[2]",
:citystzip => "#{prefix}text()[3]",
:country => "#{prefix}text()[4]",
:phone => "#{prefix}text()[5]",
xpaths.each do |data,xpath|

FileString - request for comments

apei...@gmx.net — Mon, 09 Nov 2009 01:47:20 UT

Hi there
I just put FileString on github: [link]
FileString is a class that wraps a path on the filesystem (a file) and provides an exact copy of the String API. This means you can code as if you had a String and your file on the disk gets manipulated just "magically".
The library is very young (just a bit more than 24h), so please use with care.