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  • Why can't I inherit static classes?

    - by User
    I have several classes that do not really need any state. From the organizational point of view, I would like to put them into hierarchy. But it seems I can't declare inheritance for static classes. Something like that: public static class Base { } public static class Inherited : Base { } will not work. Why have the designers of the language closed that possibility?

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  • Looking for a free xsd scheme editor

    - by Klaim
    I'm looking for a free alternative to all the XML/XSD editors around here (that are relatively expensive--at least for me). I totally fail to find one. I need it to allow me to edit xsd files to help in writting an xml-based language specification. I need it to be visual to help with the design, making it clear. Other features are less interesting for me. Any suggestion?

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  • Automatic bookkeeping for exception retries

    - by pilcrow
    Do any languages that support retry constructs in exception handling track and expose the number of times their catch/rescue (and/or try/begin) blocks have been executed in a particular run? I find myself counting (and limiting) the number of times a code block is re-executed after an exception often enough that this would be a handy language built-in.

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  • Image processing with barehands-ruby

    - by Erik Escobedo
    I want to know how to open and manipulate a simple image file in Ruby language. I don't need to do any advanced stuff, just things like open(), get_pixel() and put_pixel() and I don't wanna use any gem for doing that, but just to know the barehands-ruby way.

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  • Which web crawler to use to save news articles from a website into .txt files?

    - by brokencoding
    Hi, i am currently in dire need of news articles to test a LSI implementation (it's in a foreign language, so there isnt the usual packs of files ready to use). So i need a crawler that given a starting url, let's say http://news.bbc.co.uk/ follows all the contained links and saves their content into .txt files, if we could specify the format to be UTF8 i would be in heaven. I have 0 expertise in this area, so i beg you for some sugestions in which crawler to use for this task.

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  • Concepts: Channel vs. Stream

    - by hotzen
    Hello, is there a conceptual difference between the terms "Channel" and "Stream"? Do the terms require/determine, for example, the allowed number of concurrent Consumers or Producers? I'm currently developing a Channel/Stream of DataFlowVariables, which may be written by one producer and read by one consumer as the implementation is destructive/mutable. Would this be a Channel or Stream, is there any difference at all? Thanks

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  • Why is RAISERROR misspelled? Or is it not?

    - by Jason
    Why isn't RAISERROR spelled RAISEERROR? Where is the second E? I could understand if it were some ancient keyword length constraint, but I wouldn't expect it to be a nine-character limit. Is RAIS or RROR a technical word such that "raise-error" is just a mis-reading? Are its (immediate) origins in a different language? I've searched Google but not finding much on the subject.

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  • Can I write for .Net 4 using VS2008?

    - by chillitom
    Can I write code against .Net 4 and its libraries using VS2008? If so how should I configure it? I realise that VS2008 will probably struggle with language changes such as the dynamic keyword but can I install the version 4 and target it anyway? My only real interest is in being able to use some of the new libraries, in particular I'm interested in the TPL (http://en.wikipedia.org/wiki/Parallel_Extensions)

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  • Localizing MVVM based WPF applications

    - by bitbonk
    What would be a good aproach to localize a MVVM based WPF allication that can change its language at runtime? Of course I could create a string property in the ViewModel for each and every string that is displayed somewhere in the View but that seems rather tedious to me. Is there a common approach/best practice for this?

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  • Select users in couchdb

    - by 2x2p1p
    Hi guys I have an HTML form for authentication of users, with SQL language is easier to extract data select name, password from users where name='nameField' and password='passwordField' In couchdb I cant use local views just temp views: curl -X POST -H 'Content-Type: application/json' -d '{"map": "function (doc) {if (doc.name === "nameField" && doc.password === "passwordField") {emit (doc.name, doc.passWord)}}"}' http://localhost:5984/somedb/_temp_view But it isnt recommended (Click here), what should I do ? :( Thanks

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  • Flowchart control for ASP.NET

    - by renjucool
    I need to build a flowchart control for Asp.net with html/jquery/silverlight/Scalable Vector Graphics(SVG). The user need to design the flowchart in the web page and need to save it. Please suggest some good implementation.I tried some API's like Gliffy and Grapholite but not suitable for my scenario as this API need live internet connection. Now I'm trying with jsplump. Please help me out, Also please share any free controls for that.

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  • What is the best way to format a date in JSON for Mongo DB storage

    - by Poul
    I have a date with a time. I'm using ruby, but the language shouldn't matter. d = "2010-04-01 13:00:00" What is the best way to format this date for Mongo DB? By 'best' I mean, is there a certain format I could use where Mongo would recognize it as a date and might give me more-advanced filtering optons? ie: If formatted correctly, could I ask Mongo to return all records whose month is '04'? Thanks!

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  • Nintendo DSi SDK : Getting Started

    - by Hugoware
    Does anyone have a good starting point for learning about development for the new Nintendo DSi? What kind of hardware do you need to develop and test something like this? Can you develop for the DSi using the standard DS? What language do you need to use? [Bonus Question] : I also heard the new DSi is going to get an App Store similar to Apple - Are developers going to be able to sell games using this?

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  • What is the best service/tool to put short audio clips on a website so users can click and listen im

    - by Edward Tanguay
    I'm making a foreign language flashcard website in which I want to have 100s of short 3-10 second audio files available for users to click and listen. So I am looking for a tool/service such as YouTube or Screenr.com but for audio which e.g.: allows me to easily upload multiple kinds of audio files: mp3, wav, etc. easy to manage them online (delete, replace) has a simple, small player (e.g. flash) that integrates nicely into any site

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  • Variable sized packet structs with vectors

    - by Rev316
    Lately I've been diving into network programming, and I'm having some difficulty constructing a packet with a variable "data" property. Several prior questions have helped tremendously, but I'm still lacking some implementation details. I'm trying to avoid using variable sized arrays, and just use a vector. But I can't get it to be transmitted correctly, and I believe it's somewhere during serialization. Now for some code. Packet Header class Packet { public: void* Serialize(); bool Deserialize(void *message); unsigned int sender_id; unsigned int sequence_number; std::vector<char> data; }; Packet ImpL typedef struct { unsigned int sender_id; unsigned int sequence_number; std::vector<char> data; } Packet; void* Packet::Serialize(int size) { Packet* p = (Packet *) malloc(8 + 30); p->sender_id = htonl(this->sender_id); p->sequence_number = htonl(this->sequence_number); p->data.assign(size,'&'); //just for testing purposes } bool Packet::Deserialize(void *message) { Packet *s = (Packet*)message; this->sender_id = ntohl(s->sender_id); this->sequence_number = ntohl(s->sequence_number); this->data = s->data; } During execution, I simply create a packet, assign it's members, and send/receive accordingly. The above methods are only responsible for serialization. Unfortunately, the data never gets transferred. Couple of things to point out here. I'm guessing the malloc is wrong, but I'm not sure how else to compute it (i.e. what other value it would be). Other than that, I'm unsure of the proper way to use a vector in this fashion, and would love for someone to show me how (code examples please!) :) Edit: I've awarded the question to the most comprehensive answer regarding the implementation with a vector data property. Appreciate all the responses!

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  • Can' get couchdb external http handlers to work.

    - by fuzzy lollipop
    following the instructions here http://wiki.apache.org/couchdb/ExternalProcesses this is what I get { * error: "{{badarg,[{erlang,port_command, [#Port<0.2056>, [123, [34,<<"info">>,34], 58, [123, [34,"db_name",34], 58, [34,<<"transfer_central">>,34], 44, [34,"doc_count",34], 58,"39441",44, [34,"doc_del_count",34], 58,"0",44, [34,"update_seq",34], 58,"56508",44, [34,"purge_seq",34], 58,"0",44, [34,"compact_running",34], 58,<<"false">>,44, [34,"disk_size",34], 58,"43593828",44, [34,"instance_start_time",34], 58, [34,<<"1272560477320483">>,34], 44, [34,"disk_format_version",34], 58,"5",125], 44, [34,<<"id">>,34], 58,<<"null">>,44, [34,<<"method">>,34], 58, [34,"GET",34], 44, [34,<<"path">>,34], 58, [91, [34,<<"transfer_central">>,34], 44, [34,<<"_test">>,34], 93], 44, [34,<<"query">>,34], 58,<<"{}">>,44, [34,<<"headers">>,34], 58, [123, [34,<<"Accept">>,34], 58, [34, <<"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8,application/json">>, 34], 44, [34,<<"Accept-Charset">>,34], 58, [34,<<"ISO-8859-1,utf-8;q=0.7,*;q=0.7">>,34], 44, [34,<<"Accept-Encoding">>,34], 58, [34,<<"gzip,deflate">>,34], 44, [34,<<"Accept-Language">>,34], 58, [34,<<"en-us,en;q=0.5">>,34], 44, [34,<<"Connection">>,34], 58, [34,<<"keep-alive">>,34], 44, [34,<<"Host">>,34], 58, [34,<<"127.0.0.1:5984">>,34], 44, [34,<<"Keep-Alive">>,34], 58, [34,<<"115">>,34], 44, [34,<<"User-Agent">>,34], 58, [34, <<"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3">>, 34], 125], 44, [34,<<"body">>,34], 58, [34,"undefined",34], 44, [34,<<"peer">>,34], 58, [34,<<"127.0.0.1">>,34], 44, [34,<<"form">>,34], 58,<<"{}">>,44, [34,<<"cookie">>,34], 58,<<"{}">>,44, [34,<<"userCtx">>,34], 58, [123, [34,<<"db">>,34], 58, [34,<<"transfer_central">>,34], 44, [34,<<"name">>,34], 58,<<"null">>,44, [34,<<"roles">>,34], 58,<<"[]">>,125], 125,10]]}, {couch_os_process,writeline,2}, {couch_os_process,writejson,2}, {couch_os_process,handle_call,3}, {gen_server,handle_msg,5}, {proc_lib,init_p_do_apply,3}]}, {gen_server,call, [<0.110.0>, {prompt,{[{<<"info">>, {[{db_name,<<"transfer_central">>}, {doc_count,39441}, {doc_del_count,0}, {update_seq,56508}, {purge_seq,0}, {compact_running,false}, {disk_size,43593828}, {instance_start_time,<<"1272560477320483">>}, {disk_format_version,5}]}}, {<<"id">>,null}, {<<"method">>,'GET'}, {<<"path">>,[<<"transfer_central">>,<<"_test">>]}, {<<"query">>,{[]}}, {<<"headers">>, {[{<<"Accept">>, <<"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8,application/json">>}, {<<"Accept-Charset">>, <<"ISO-8859-1,utf-8;q=0.7,*;q=0.7">>}, {<<"Accept-Encoding">>,<<"gzip,deflate">>}, {<<"Accept-Language">>,<<"en-us,en;q=0.5">>}, {<<"Connection">>,<<"keep-alive">>}, {<<"Host">>,<<"127.0.0.1:5984">>}, {<<"Keep-Alive">>,<<"115">>}, {<<"User-Agent">>, <<"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3">>}]}}, {<<"body">>,undefined}, {<<"peer">>,<<"127.0.0.1">>}, {<<"form">>,{[]}}, {<<"cookie">>,{[]}}, {<<"userCtx">>, {[{<<"db">>,<<"transfer_central">>}, {<<"name">>,null}, {<<"roles">>,[]}]}}]}}, infinity]}}" * reason: "{gen_server,call, [<0.109.0>, {execute,{[{<<"info">>, {[{db_name,<<"transfer_central">>}, {doc_count,39441}, {doc_del_count,0}, {update_seq,56508}, {purge_seq,0}, {compact_running,false}, {disk_size,43593828}, {instance_start_time,<<"1272560477320483">>}, {disk_format_version,5}]}}, {<<"id">>,null}, {<<"method">>,'GET'}, {<<"path">>,[<<"transfer_central">>,<<"_test">>]}, {<<"query">>,{[]}}, {<<"headers">>, {[{<<"Accept">>, <<"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8,application/json">>}, {<<"Accept-Charset">>, <<"ISO-8859-1,utf-8;q=0.7,*;q=0.7">>}, {<<"Accept-Encoding">>,<<"gzip,deflate">>}, {<<"Accept-Language">>,<<"en-us,en;q=0.5">>}, {<<"Connection">>,<<"keep-alive">>}, {<<"Host">>,<<"127.0.0.1:5984">>}, {<<"Keep-Alive">>,<<"115">>}, {<<"User-Agent">>, <<"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3">>}]}}, {<<"body">>,undefined}, {<<"peer">>,<<"127.0.0.1">>}, {<<"form">>,{[]}}, {<<"cookie">>,{[]}}, {<<"userCtx">>, {[{<<"db">>,<<"transfer_central">>}, {<<"name">>,null}, {<<"roles">>,[]}]}}]}}, infinity]}" }

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  • Visual Studio support for coding in MSIL?

    - by jdk
    For the longest time I've been curious to code in Microsoft Intermediate Language (MSIL) just as an academic endeavour and to gain a better understanding of what's "happening under the hood". Is there any sort of Visual Studio support for this in the form of: project templates, IntelliSense integration, and those kind of RAD features?

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