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• Using ZeroC Middleware

  - by Sean

  I'm currently looking at various middleware solutions that will allow me to create applications in a variety of languages which are able to communicate amongst each other. The ZeroC product suite seems ideal as it provides a language agnostic way of defining data and the services that operate on the data (via its ICE idl) and provides support for all the mainstream languages. It also appears to offer a lot of other things we'd want, such as load balancing, grid computing and managed deployment. However, my google-fu has let me down and I'm having trouble finding information from people who have used it to implements system. I'm looking for feedback from projects that use it, and what issues/successes they had. I'm also interested in feedback from projects that evaluated it and chose not to use it (and why).

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• Hook Response.Cache to memcache

  - by dvr

  Has anyone done this before? I have a 32 bit win 2003 server running 2.0 and have read the ms engineers' blog about min(60%, 1800mb) for cache limits and our site (asp.net 2.0 / 3.5) is caching alot. It throws system outofmemory exceptions when wp is around 1.3gb (unfortunately it is the 2.0 apps) and I would like to push alot over to memcache but worried that at the moment the site is efficient using response.cache as is (though memory is an issue). I want to move most items over to memcache and have concerns on a – how to do this (implementation of response.cache to read/write from memcache) and b – what will performance be like? Before I commit to doing this and possibly spending a few days running tests I would like to hear from you if this has been done already and get some feedback. (and please don’t tell me to buy a x64 machine – I have already requested this!), by the way I ran a test requesting a single image 1000 times and response.cache was over 50% quicker than using application cache. Does response.cache bypass the page lifecycle?

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• Which is faster in Python: x**.5 or math.sqrt(x)?

  - by Casey

  I've been wondering this for some time. As the title say, which is faster, the actual function or simply raising to the half power? UPDATE This is not a matter of premature optimization. This is simply a question of how the underlying code actually works. What is the theory of how Python code works? I sent Guido van Rossum an email cause I really wanted to know the differences in these methods. My email: There are at least 3 ways to do a square root in Python: math.sqrt, the '**' operator and pow(x,.5). I'm just curious as to the differences in the implementation of each of these. When it comes to efficiency which is better? His response: pow and ** are equivalent; math.sqrt doesn't work for complex numbers, and links to the C sqrt() function. As to which one is faster, I have no idea...

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• Mac OS X Development.

  - by j-t-s

  Hi All, I would love to begin developing applications for the MAC OS X, although I have to idea where to start. Problem: I currently do not, and cannot afford a new MAC OS X-based computer. Solution: A very good friend loves trying out things that I've made for Windows, and also owns a MAC OS X computer, and is willing to test these new creations. Now I am faced with another problem. I don't know which language to use to develop these apps in. I am a .NET Developer and seeing as though I can only use a Windows based PC to develop MAC apps, where should I start? I've heard of Mono, and have used it on Linux before, would Mono be an option for MAC development on a Windows based computer, too? Are there any other ways around this? Any help is appreciated. :) Thank you jt

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• postgres - ERROR: syntax error at or near "COST"

  - by cino21122

  EDIT Taking COST 100 out made the command go through, however, I'm still unable to run my query because it yields this error: ERROR: function group_concat(character) does not exist HINT: No function matches the given name and argument types. You may need to add explicit type casts. The query I'm running is this: select tpid, group_concat(z) as z, group_concat(cast(r as char(2))) as r, group_concat(to_char(datecreated,'DD-Mon-YYYY HH12:MI am')) as datecreated, group_concat(to_char(datemodified,'DD-Mon-YYYY HH12:MI am')) as datemodified from tpids group by tpid order by tpid, zip This function seems to work fine locally, but moving it online yields this error... Is there something I'm missing? CREATE OR REPLACE FUNCTION group_concat(text, text) RETURNS text AS $BODY$ SELECT CASE WHEN $2 IS NULL THEN $1 WHEN $1 IS NULL THEN $2 ELSE $1 operator(pg_catalog.||) ',' operator(pg_catalog.||) $2 END $BODY$ LANGUAGE 'sql' IMMUTABLE COST 100; ALTER FUNCTION group_concat(text, text) OWNER TO j76dd3;

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• mod_rewrite and pretty urls

  - by Peeter

  What I'm trying to achieve: 1) http://localhost/en/script.php?param1=random is mapped to http://localhost/script.php?param1=random&language=English This has to work always. 2) http://localhost/en/random/text/here will be mapped to http://localhost/categories.php?term=random/text/here This has to work if random/text/here is 404 What I have at the moment: RewriteEngine on RewriteCond substr(%{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^en/(.+)$ categories.php?lang=English&terms=$1 [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^ee/(.+)$ categories.php?lang=Estonian&terms=$1 [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^fi/(.+)$ categories.php?lang=Finnish&terms=$1 [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^ru/(.+)$ categories.php?lang=Russian&terms=$1 [L] RewriteRule ^en/(.*) $1?lang=English&%{QUERY_STRING} [L] RewriteRule ^ee/(.*) $1?lang=Estonian&%{QUERY_STRING} [L] RewriteRule ^ru/(.*) $1?lang=Russian&%{QUERY_STRING} [L] RewriteRule ^fi/(.*) $1?lang=Finnish&%{QUERY_STRING} [L] What I've thought: substr(%{REQUEST_FILENAME},3) would fix my problem (as currently /ee/index.php is literally mapped to /ee/index.php instead of just /index.php) Unfortunately I couldn't find a way to manipulate strings :/

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• Force jQuery to accept XHTML string as XML?

  - by MidnightLightning

  So, as part of a baseline OpenID implementation in Javascript, I'm fetching a remote page source through AJAX, and looking for the <link rel="openid.server" href="http://www.example.com" /> tag in the head. I'm using the jQuery javascript library for the AJAX request, but am unable to parse out the link tags. Several other online sources talk about using the usual jQuery selectors to grab tags from XML/XHTML sources, but it seems jQuery can only get content from the body of an HTML document, not the head (which is where the link tags are; $(response).find('link') returns null). So, I'd either need to get jQuery to force this document into XML mode or otherwise get at the head tags. Is there a way to force jQuery to parse the response of an AJAX query as XML, when it's in reality XHTML? Or do I need to fall back to regular expressions to get the link tags out?

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• Rub, regex, sentences

  - by Perello

  I'm currently building a code generator, which aim to generate boiler plate for me once i wrote the templates and/or translations, whatever the language i have to work with, and it has an educationnal part :p. So i have a problem with a regex in ruby. The regex aim to select whatever is between {{{ and }}}, so i can generae functions according to my needs. My regex is currently : /\{\{\{(([a-zA-Z]|\s)+)\}\}\}/m My test data set {{{Demande aaa}}} = {{{tagadatsouintsouin tutu}}} The results are : [["Demande aaa", "a"], ["tagadatsouintsouin tutu", "u"]] So the regex pick each time the last character twice. But, that's not exactly what i want, my need is more about this : /\{\{\{((\w|\W)+)\}\}\}/m But this as a flaw too, the results : [["Demande aaa}}} = {{{tagadatsouintsouin tutu", "u"]] Whereas, i wish to get [["Demande aaa"],["tagadatsouintsouin tutu"]] Any ideas to correct theses regex ? I could use 2 sets of delimiters, but it won't learn me anything.

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• Csharp component which generates fragments with highlights for diffs for 2 strings

  - by MicMit

  I need C# implementation ( ideally open source ) which is similar to Delphi DLL. I am currently using the wrapper ( C# syntax is provided , but it is a call from a different language ) zdiff( string ref str1, string ref str2, int range , int trim ) it calls inside str1 = GetHiDiff(@str1,1,trim) str2 = GetHiDiff(@str1,2,trim) where function GetHiDiff(s:pchar; sIndex:integer; wtrim:integer): pchar; stdcall; What it does it returns a left fragment html of str1 and a right html fragment of str2 with diffs highlighted as strings are passed by reference. Range parameter determines the size of html fragment. Not sure what trim 0 does.

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• Google Translate Widget fails in Firefox

  - by Jonathan

  I am attempting to implement the Google Translate Widget where you include a piece of javascript code into your page and it gives you a language dropdown. This was very straightforward however, it does not work in Firefox. It works in IE, Safari, Chrome. Has anybody experience this problem and is there any workaround? With some research, it seems that people said that it used flash. However, I don't have any flashblock installed or anything like that. The widget: Widget Info If you load up the Google Translate blog, their translate box in the top right doesn't work: Google Translate Blog

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• Extract string from string using Regex

  - by stacker

  I want to extract MasterPage value directive from a view page. I want the fastest way to do that, taking into account a very big aspx pages, and a very small ones. I think the best way is to do that with two stages: Extract the page directive section from the view (using Regex): <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %> Then, extract the value inside MasterPageFile attribute. The result needs to be: ~/Views/Shared/Site.Master. Can I have help from someone to implement this? I badly want to use only regex, but I don't Regex expert. Another thing, Do you think that Regex is the fastest way to do this?

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• How to test a project with multiple python versions in a sequential way?

  - by ecolell

  I am developing a python adapter to interact with a 3rd party website, without any json or xml api (http://www.class.noaa.gov/). I have a problem when Travis CI run multiple python tests (of the The Travis CI Build Matrix) concurrently. The project is on GitHub at ecolell/noaaclass and the .travis.yml file is: language: python python: - "2.6" - "2.7" - "3.2" - "3.3" install: - "make deploy" script: "make test-coverage-travis-ci" #nosetests after_success: - "make test-coveralls" Specifically, I have a problem when at least 2 python versions were running their unit tests at the same time, because they use the same account of a website. Is there any option to specify to The Build Matrix the execution of each python version in a secuential way? Or maybe, Is there a better way to do this?

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• All possible combinations of n items selected randomly from a set of x items (algorithm)

  - by SubPortal

  I have a set of x string items e.g("A","B","C","D","E","F") I need to know the formula that calculates how many combinations of n items and what is the algorithm that generates all possible combinations e.g if we need to select 4 items from the list randomly. those 4 items could be: ("A","B","C","D") or ("A","B","C","E") or ("A","B","C","F") or ("A","B","D","E") ...etc I need the formula that calculates how many sets of items will be generated without repetition, that is we consider ("A","B","C","D") as one of the resulted combinations we cannot consider the same items as another resultant combination with replacing the positions of the items in the set like ("A","B","D","C") Also I need the algorithm that generates all possible combinations in any programming language. [C#,VB.NET,Java,C++] Thank you for any help.

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• How does Linq-to-Xml convert objects to strings?

  - by Eamon Nerbonne

  Linq-to-Xml contains lots of methods that allow you to add arbitrary objects to an xml tree. These objects are converted to strings by some means, but I can't seem to find the specification of how this occurs. The conversion I'm referring to is mentioned (but not specified) in MSDN. I happen to need this for javascript interop, but that doesn't much matter to the question. Linq to Xml isn't just calling .ToString(). Firstly, it'll accept null elements, and secondly, it's doing things no .ToString() implementation does: For example: new XElement("elem",true).ToString() == "<elem>true</elem>" //but... true.ToString() == "True" //IIRC, this is culture invariant, but in any case... true.ToString(CultureInfo.InvariantCulture) == "True" Other basic data types are similarly specially treated. So, does anybody know what it's doing and where that's described?

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• Size of int in C on different architectures

  - by NawaMan

  I am aware that the specification of the C language does not dictate the exact size of each integer type (e.g., int). What I am wondering is: Is there a way in C (not C++) to define an integer type with a specific size that ensures it will be the same across different architectures? Like: typedef int8 <an integer with 8 bits> typedef int16 <an integer with 16 bits> Or any other way that will allow other parts of the program to be compiled on different architecture.

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• Server Push / HTTP Streaming on Windows Mobile / Windows CE

  - by afriza

  Hi, I find that HTTP Streaming / Server Push is quite promising for my project. Does someone have any clue on how to implement this in Windows Mobile? .NET / Native / other implementations are welcomed. Preferably with permissive license. some links on HTTP Steaming / Server Push: - Push Technology - Streaming HTTP / Server Push - Cross-browser implementation of “HTTP Streaming” (push) AJAX pattern - XEP-0124: Bidirectional-streams Over Synchronous HTTP (BOSH) I was thinking of using some Qt XMPP library (QXmpp) to do the job, but I'm not sure if it's up for the task and I also want to hear some opinions on this.

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• Eliminating code duplication in a single file

  - by Jon

  Sadly, a project that I have been working on lately has a large amount of copy-and-paste code, even within single files. Are there any tools or techniques that can detect duplication or near-duplication within a single file? I have Beyond Compare 3 and it works well for comparing separate files, but I am at a loss for comparing single files. Thanks in advance. Edit: Thanks for all the great tools! I'll definitely check them out. This project is an ASP.NET/C# project, but I work with a variety of languages including Java; I'm interested in what tools are best (for any language) to remove duplication.

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• Multilingual support using gettext with codeigniter, best practice?

  - by tobefound

  I know how to create .po files and how to generate .mo files and then use them for translation on my Codeigniter powered site. However, I'm not quite sure on how to change language from the site GUI. I want to stick to codeigniter's default url calling schema: www.domain.com/controllername/method/param1/param2. Calling the server like this is a no-brainer: www.domain.com/controllername?lang=en Doing that for every controller using the default url schema, requires me to implement the same method in every controller, just to pass the lang parameter to the setlocale() function and then bind to my .po domain name. Feels awkward... ANy ideas how you guys work with gettext in codeigniter? And yes, I do want to work with gettext.

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• Grafting Scala 2.8 into a Netbeans NBAndroid Project...What steps am I missing?

  - by Michael Kohout

  Hi All; Due to Apple's recent T+C hijinks, I've become interested in developing for Android. Anyways, I'm trying to get a mixed-language Android 2.1 project going in Netbeans 6.8 (with the NBAndroid 0.10 plugin). The two languages being Java and Scala(2.8 head build). To give you a basic idea of what the app does right now, it's just a simple "Hello World" app. To get this to build, I've modified the projects's build.xml file: -- -injars ${scala-library}(!META-INF/MANIFEST.MF,!library.properties) -outjars "${build.classes.dir}/classes.min.jar" -libraryjars "${file.reference.android.jar}" -dontwarn -dontoptimize -dontobfuscate -keep public class * extends android.app.Activity -keep public class scala.xml.include.sax.Main** I've gotten the project so that it'll build, but it errors on startup in my Android Emulator(inside the emulator Android tells me my application has stopped unexpectedly). So my questions are: Does anyone see what I may be doing wrong? And is there any way to get access to the logs that the emulator must create? thanks Mike Kohout

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• Can Cython compile to an EXE?

  - by ThantiK

  I know what Cythons purpose is. It's to write compilable C extensions in a Python-like language in order to produce speedups in your code. What I would like to know (and can't seem to find using my google-fu) is if Cython can somehow compile into an executable format since it already seems to break python code down into C. I already use Py2Exe, which is just a packager, but am interested in using this to compile down to something that is a little harder to unpack (Anything packed using Py2EXE can basically just be extracted using 7zip which I do not want) It seems if this is not possible my next alternative would just be to compile all my code and load it as a module and then package that using py2exe at least getting most of my code into compiled form, right?

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• What are the real-world benefits of declarative-UI languages such as XAML and QML?

  - by Stu Mackellar

  I'm currently evaluating QtQuick (Qt User Interface Creation Kit) which will be released as part of Qt 4.7. QML is the JavaScript-based declarative language behind QtQuick. It seems to be a very powerful concept, but I'm wondering if anybody that's made extensive use of other, more mature declarative-UI languages like XAML in WPF or Silverlight can give any insight into the real-world benefits that can be gained from this style of programming. Various advantages are often cited: Speed of development Forces separation between presentation and logic Better integration between coders and designers UI changes don't require re-compilation Also, are there any downsides? A few potential areas of concern spring to mind: Execution speed Memory usage Added complexity Are there any other considerations that should be taken into account?

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• Dynamics of the using keyword

  - by AngryHacker

  Consider the following code: // module level declaration Socket _client; void ProcessSocket() { _client = GetSocketFromSomewhere(); using (_client) { DoStuff(); // receive and send data Close(); } } void Close() { _client.Close(); _client = null; } Given that that the code calls the Close() method, which closes the _client socket and sets it to null, while still inside the `using' block, what exactly happens behind the scenes? Does the socket really get closed? Are there side effects? P.S. This is using C# 3.0 on the .NET MicroFramework, but I suppose the c#, the language, should function identically. The reason i am asking is that occasionally, very rarely, I run out of sockets (which is a very precious resource on a .NET MF devices).

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• easiest way to convert virtualbox snapshots to tree view

  - by amir beygi

  HI all My virtual box snapshot view is like this Name: Snapshot 2 (UUID: cb45aef4-54d4-4c4e-ad3e-dd7cccb6103a) Name: s131 (UUID: 8ec30c82-7796-4e51-8161-979f1b95fb0f) Name: s131 (UUID: 42066f33-969b-41f3-a779-7f6e2c45ea2c) Name: s131 (UUID: d71b9bc5-b862-46b5-ae4d-f88d3dd9756d) Name: s131 (UUID: 681896a9-7e61-4b5a-90bc-cb1bd785c6fc) Name: s131 (UUID: d7bf8593-d218-442d-b23b-4ee16e74087d) Name: s131 (UUID: e8b16fd2-7add-4294-b908-34c4e6dc79dc) Name: s131 (UUID: 57c3f5d7-d4ed-4a62-a7b8-5594f819e08e) Name: Snapshot 3 (UUID: 4a684149-9dd6-4bb2-baf5-5f590e91a344) Name: Snapshot 4 (UUID: d4cbaa7c-ae78-41e0-9962-46c587a9c667) Name: Snapshot 5 (UUID: 81567b6e-eea9-49a6-b3b8-a07f0be337d8) * and i want to convert this text to a tree like this Name: Snapshot 2 (UUID: cb45aef4-54d4-4c4e-ad3e-dd7cccb6103a) +--Name: s131 (UUID: 8ec30c82-7796-4e51-8161-979f1b95fb0f) +--Name: s131 (UUID: 42066f33-969b-41f3-a779-7f6e2c45ea2c) +--Name: s131 (UUID: d71b9bc5-b862-46b5-ae4d-f88d3dd9756d) +--Name: s131 (UUID: 681896a9-7e61-4b5a-90bc-cb1bd785c6fc) | +--Name: s131 (UUID: d7bf8593-d218-442d-b23b-4ee16e74087d) | +--Name: s131 (UUID: e8b16fd2-7add-4294-b908-34c4e6dc79dc) | +--Name: s131 (UUID: 57c3f5d7-d4ed-4a62-a7b8-5594f819e08e) +--Name: Snapshot 3 (UUID: 4a684149-9dd6-4bb2-baf5-5f590e91a344) +--Name: Snapshot 4 (UUID: d4cbaa7c-ae78-41e0-9962-46c587a9c667) +--Name: Snapshot 5 (UUID: 81567b6e-eea9-49a6-b3b8-a07f0be337d8) * or even an array that contents line number and parent's line number. My environment is linux, programming language is C, and i got this results from this shell command VBoxManage snapshot s2000 showvminfo s|grep Name|grep UUID

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• Guessing the time zone from an arbitrary "location" string?

  - by Thomas

  I'm trying to run some statistics over the Stack Overflow data dump, and for that I would like to know the time zone for each user. However, all I have to go on is the completely free-form "location" string. I'll stress that I'm only looking for an approximation of the time zone; of course, in general this is an unsolvable problem. However, many people fill out their country, state and/or city, which should give a pretty good indication. It's okay if it fails for other cases. It doesn't have to be reliable, it doesn't have to be accurate, it doesn't have to cover all bases. I don't want to waste too much time on this, so I'm wondering if there is some code out there that can make a reasonable guess. Any language, platform, API or library goes. Any ideas?

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• java - call web service operation - wrong return type

  - by user1639680

  i have a simple web service with one method that returns List<org.company.data.mp> i've created a simple web service client and specified a web service with wsdl. in netbeans i try to call a web service operation: right click, insert code, ... and i pick my web service operation. the code gets inserted but the method's return type is not List<org.company.data.mp> but it is List<org.company.server.mp>! i don't get it.. in the package "server" there is no class called mp! i check the implementation class of my web service - it says the return type is ...data.mp not ...server.mp

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