[#389739] Ruby Challenge — teresa nuagen <unguyen90@...>

Here is a ruby challenge for all you computer science lovers out there,

22 messages 2011/11/05
[#389769] Re: Ruby Challenge — "Jonan S." <jonanscheffler@...> 2011/11/05

Totally unrelated to any husker computer science programs right? Like

[#389905] Re: Ruby Challenge — Stephen Ramsay <sramsay.unl@...> 2011/11/09

Jonan S. wrote in post #1030330:

[#389907] Re: Ruby Challenge — aseret nuagen <unguyen90@...> 2011/11/09

> You mean like the professor for the course? Because that would be me .

[#389915] Re: Ruby Challenge — Robert Klemme <shortcutter@...> 2011/11/09

On Wed, Nov 9, 2011 at 4:52 AM, aseret nuagen <unguyen90@aim.com> wrote:

[#389792] Tricky DSL, how to do it? — Intransition <transfire@...>

I'd want to write a DSL such that a surface method_missing catches

18 messages 2011/11/06

[#389858] Compiling Ruby Inline C code - resolving errors — Martin Hansen <mail@...>

I am trying to get this Ruby inline C code http://pastie.org/2825882 to

12 messages 2011/11/08

[#389928] Forming a Ruby meetup group... — "Darryl L. Pierce" <mcpierce@...>

Where I work we have a local Ruby group that used to meet up, until the

12 messages 2011/11/09

[#389950] The faster way to read files — "Noé Alejandro" <casanejo@...>

Does anybody know which is the fastest way to read a file? Lets say

18 messages 2011/11/09

[#390064] referring to version numbers in a gem — Chad Perrin <code@...>

How do I specify and access a gem's version number within the code of the

28 messages 2011/11/11

[#390238] RVM problem, plz help — Misha Ognev <b1368810@...>

Hi, I have this problem:

15 messages 2011/11/16

[#390308] any command line tools for querying yaml files — Rahul Kumar <sentinel1879@...>

(Sorry, this is not exactly a ruby question).

11 messages 2011/11/18

[#390338] Newbie - cmd question — Otto Dydakt <ottodydakt@...>

I've literally JUST downloaded ruby from rubyinstaller.org.

21 messages 2011/11/19
[#390342] Re: Newbie - cmd question — Otto Dydakt <ottodydakt@...> 2011/11/19

OK thank you, I uninstalled & reinstalled, checking the three boxes at

[#390343] Re: Newbie - cmd question — "Ian M. Asaff" <ian.asaff@...> 2011/11/19

did you type "irb" first to bring up the ruby command prompt?

[#391154] Re: Newbie - cmd question — "Hussain A." <hahmad@...> 2011/12/12

Hi all,

[#391165] Re: Newbie - cmd question — Luis Lavena <luislavena@...> 2011/12/12

Hussain A. wrote in post #1036281:

[#390374] Principle of Best Principles — Intransition <transfire@...>

I seem to run into a couple of design issue a lot and I never know what is

16 messages 2011/11/20

[#390396] how to call Function argument into another ruby script. — hari mahesh <harismahesh@...>

Consider I have a ruby file called library.rb.

10 messages 2011/11/21

[#390496] How to make 1.9.2 my default version using RVM — Fily Salas <fs_tigre@...>

Hi,

25 messages 2011/11/24

[#390535] Is high-speed sorting impossible with Ruby? — "Gaurav C." <chande.gaurav@...>

Well, first of all, I'm new to Ruby, and to this forum. So, hello. :)

39 messages 2011/11/25
[#390580] Re: Is high-speed sorting impossible with Ruby? — Joao Pedrosa <joaopedrosa@...> 2011/11/27

Hi,

[#390593] Re: Is high-speed sorting impossible with Ruby? — "Gaurav C." <chande.gaurav@...> 2011/11/27

Joao Pedrosa wrote in post #1033884:

[#390600] Re: Is high-speed sorting impossible with Ruby? — Douglas Seifert <doug@...> 2011/11/27

A big gain can be had by disabling the garbage collector. Here is my best

[#390601] Re: Is high-speed sorting impossible with Ruby? — Douglas Seifert <doug@...> 2011/11/27

I've thrown various solutions up on github here:

[#390650] Loading a faulty ruby file - forcing this — Marc Heiler <shevegen@...>

Hi.

10 messages 2011/11/29

[#390689] Stupid question — James Gallagher <lollyproductions@...>

Hi everyone.

22 messages 2011/11/30

Re: NOKIGIRI XPATH

From: Jes俍 Gabriel y Gal疣 <jgabrielygalan@...>
Date: 2011-11-24 15:32:32 UTC
List: ruby-talk #390491
On Thu, Nov 24, 2011 at 1:49 PM, Robert Klemme
<shortcutter@googlemail.com> wrote:
> 2011/11/24 Jes=FAs Gabriel y Gal=E1n <jgabrielygalan@gmail.com>:
>> On Thu, Nov 24, 2011 at 12:30 PM, Ruby Mania <prateek123@gmail.com> wrot=
e:
>>> Thanks a lot for help. But it matched CDEF and all nodes after that eve=
n
>>> if key !=3D english
>>
>> I'm not sure why is this. I'm still trying to come up with a good
>> XPath that will return just that node,
>
> Well, there could be many matches and from the original posting I
> cannot see that only the first is needed.

What I don't understand is why that xpath returns nodes whose
preceding key sibling doesn't have 'English' as value.
I mean:


<topics>
  <topic>
    <key>English</key>
    <topic><data>CDEF</data></topic>
  </topic>
  <topic>
    <key>Spanish</key>
    <topic><data>ABC</data></topic>
  </topic>
</topics>

Why that xpath returns the ABC also. I would have thought that
following-sibling for <key>English</key> would only be the
<topic><data>CDEF</data></topic>, from which we are selecting the data
node.


>> but in the meantime you can do this:
>>
>> doc.xpath("//key[. =3D 'English']/following-sibling::topic/data")[0]
>
> Or better
>
> doc.at_xpath("//key[. =3D 'English']/following-sibling::topic[1]/data")
>
> I would probably do
>
> doc.xpath('//topic[preceding-sibling::key[text()=3D"English"]]//data')
>
> or, for one hit only
>
> doc.at_xpath('//topic[preceding-sibling::key[text()=3D"English"]][1]//dat=
a')
>
> Not sure about efficiency but I prefer it visually to have the path to
> the selected node as basis and use criteria in [] for filtering.

I agree with you, and I would guess this is more efficient, since
nokogiri doesn't have to return as many nodes.

Jesus.

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