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  • Seeking Functional Programming Lexicon

    - by Randall Schulz
    Hi, Knowing the argot of a field helps me a lot, especially since it allows me to converse intelligently with those who know a lot more than I, so I would like to find a good lexicon of Functional Programming terms. E.g., I repeatedly encounter these: Functor, Arrow, Category, Kleisli, Monad, Monoid, a veritable zoo of Morphisms, etc. I also notice many of these appear with prefixes such as "covariant", "co-", "endo-" etc. Of these, I can say I actually understand Monoid and Covariant and sort of get Monad, but the rest are still gibberish to me. (Note that I don't mean this list as exhaustive and I'm not looking to have these defined or described for me here, I'm looking for learning resources.) Can someone point me towards an FP lexicon? It need not be on-line, as long as it's possible to find it (and it's not a rare volume for which I'd have to pay many tens of dollars).

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  • Windows API - Beginner help

    - by nXqd
    I try to create a very simple app using windows API. I've done some small apps in console. This is the first time I do with Win32 apps. I've searched and found a document from forgers which is recommended in this site. But I try to write very first line: #include <stdafx.h> #include <windows.h> int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { MessageBoxW (NULL, "Good bye Cruel World", "Note", MB_OK ); return 0; } But it doesn't work ( erased lines from default project created by VS 2008 and write these lines ) Waiting for your answers :)

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  • CPP extension and multiline literals in Haskell

    - by jetxee
    Is it possible to use CPP extension on Haskell code which contains multiline string literals? Are there other conditional compilation techniques for Haskell? For example, let's take this code: -- If the next line is uncommented, the program does not compile. -- {-# LANGUAGE CPP #-} msg = "Hello\ \ Wor\ \ld!" main = putStrLn msg If I uncomment {-# LANGUAGE CPP #-}, then GHC refutes this code with a lexical error: [1 of 1] Compiling Main ( cpp-multiline.hs, cpp-multiline.o ) cpp-multiline.hs:4:17: lexical error in string/character literal at character 'o' Using GHC 6.12.1, cpphs is available. I confirm that using cpphs.compat wrapper and -pgmP cpphs.compat option helps, but I'd like to have a solution which does not depend on custom shell scripts. -pgmP cpphs does not work. P.S. I need to use different code for GHC < 6.12 and GHC = 6.12, is it possible without preprocessor?

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  • C++ template name pretty print

    - by aaa
    hello. I have need to print indented template names for debugging purposes. For example, instead of single-line, I would like to indent name like this: boost::phoenix::actor< boost::phoenix::composite< boost::phoenix::less_eval, boost::fusion::vector< boost::phoenix::argument<0>, boost::phoenix::argument<1>, I started writing my own but is getting to be complicated. Is there an existing solution? if there is not one, can you help me to finish up my implementation? I will post it if so. Thanks

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  • route finding between two designation on maps in android?

    - by androidbase Praveen
    i want to just find a shortest path between the location on map. we have to pass the location's geopoint then click the button to get direction. it will show the shortest path like a blue line. how to do this? i search about this. many of them import a package com.google.googlenav.*;. where i have to get this? Any Idea???? Edit:got downloaded the Cloudemade API. how to draw the lines between the points.

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  • Perl system call

    - by claferri
    I'm a beginner in Perl and I have some trouble using the "system" call. Here is a little piece of code where I try to execute 2 shell commands : # First command is : # dot -Tpng $dottmpfile > $pngfile # Second command is : # rm $dottmpfile if (!($pngfile eq "")) { my @args = ("dot", "-Tpng", $dottmpfile, " > ", $pngfile); system (join (' ' , @args )) or die "system @args failed : $!"; unlink $dottmpfile; } EDIT : Here is my code now, and I still get an error : system dot -Tpng toto.dot > toto.png failed : Inappropriate ioctl for device at /home/claferri/bin/fractal.pl line 79. I've used this to produce this piece of code.

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  • c#: IsNullableType helper class ?

    - by mark smith
    Hi there, Can anyone help? I have some code that is shared between 2 projects. The code points to a model which basically is a collection of properties that comes from a db. Problem being is that some properties use nullable types in 1 model and the other it doesn't Really the dbs should use the same but they don't .. so for example there is a property called IsAvailble which uses "bool" in one model and the other it uses bool? (nullable type) so in my code i do the following objContract.IsAvailble.Value ? "Yes" : "No" //notice the property .VALUE as its a bool? (nullable type) but this line will fail on model that uses a standard "bool" (not nullable) as there is no property .VALUE on types that are NOT nullable Is there some kind of helper class that i check if the property is a nullable type and i can return .Value .. otherwise i just return the property. Anybody have a solution for this?

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  • CSS Trouble, Why does it move itself?

    - by Patrick
    Hello! I am stuck on the CSS part, am helping a friend to implement one thing on her webpage. Its a dropdown menu and i got everything working the way i want it to. My problem is that it moves itself to the beginning of the row? http://gazet.se/TestPages/Test.aspx Its just below the logo and as you can see, its on the correct line but not in the correct position (should be between the purple "Nyhetsbrev" and the black "Experthörnan"-images, but it ends up on the beginning of the row instead? Any ideas?

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  • How to avoid Cartesian product in an INNER JOIN query?

    - by flhe
    I have 6 tables, let's call them a,b,c,d,e,f. Now I want to search all the colums (except the ID columns) of all tables for a certain word, let's say 'Joe'. What I did was, I made INNER JOINS over all the tables and then used LIKE to search the columns. INNER JOIN ... ON INNER JOIN ... ON.......etc. WHERE a.firstname ~* 'Joe' OR a.lastname ~* 'Joe' OR b.favorite_food ~* 'Joe' OR c.job ~* 'Joe'.......etc. The results are correct, I get all the colums I was looking for. But I also get some kind of cartesian product, I get 2 or more lines with almost the same results. How can i avoid this? I want so have each line only once, since the results should appear on a web search.

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  • Paperclip - Stream not recognized by identify command

    - by user117046
    I'm getting a paperclip error every time that I upload an image: [paperclip] An error was received while processing: #<Paperclip::NotIdentifiedByImageMagickError: /tmp/stream20100531-1921-uvlewk-0 is not recognized by the 'identify' command.> I'm running: Ubuntu 10.04, Imagemagick 6.5.1-0 (via apt-get), Paperclip 3.2.1.1 My path to identify is 'usr/bin/identify' and have confirmed Imagemagick works via command line I've tried putting adding the path to the options, but to no avail. I've tried: Paperclip.options[:command_path] = "usr/bin" or Paperclip.options.merge!(:command_path => "/usr/bin") in environment.rb or config/initializers/paperclip.rb. Though it makes no rational sense, I also tried "usr/local/bin" since this is the default for most people. Any thoughts on getting around this? Thanks!

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  • How to turn on Mercurial in existing Eclipse project ?

    - by Rabarberski
    I've installed the HgEclipse plugin for Mercurial integration in Eclipse. I have an existing (Java) project in Eclipse, but I can't figure out how to turn on mercurial change tracking for this existing project. It seems I can do an import of a mercurial project (File Import Mercurial Clone ...), but that's only for new Eclipse projects... Of course, I can apply Mercurial via the command line, e.g. hg init in the project directory, but this doesn't get picked up in Eclipse. So, how do I turn on Mercurial for existing Eclipse projects?

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  • c# ASP HttpResponse with redirect causes HTTP 302

    - by acnse
    Hi, I have a flow of web pages A and B. On the web page A, I do a "Response.Redirect("B.aspx"); The page B needs a client certificate. When the redirect is done I see a popup asking for a client certificate. I select the correct certificate, which is retrieved from a smart card, and then I insert the pin. Right after, I see a page saying that the connection was lost, and I receive an HTTP 302. I never reach the page B.aspx. I tried to add the following line "Response.RedirectLocation = "B.aspx"; but with no success too. Any hints? Thanks

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  • Trying to add AddThis to multiple items through JavaScript

    - by Mantorok
    I have to add an AddThis chunk to a bunch of controls, the reason I'm doing this through JS is because the addthis: attributes cause XHTML validation errors, so I wrote a JS script that takes the control I want to add the html into and some other bits: function AddExternalLinks(control, url, title) { $(control).html("<div class'addthis_toolbox addthis_default_style'><a class='addthis_button_facebook'" + " addthis:url=" + url + " addthis:title=" + title + " addthis:description=" + title + "></a>" + "<a class='addthis_button_twitter' " + " addthis:url=" + url + " addthis:title=" + title + " addthis:description=" + title + "></a></div>" + "<script type='text/javascript' src='http://s7.addthis.com/js/250/addthis_widget.js#username=cornwallweb'></script>"); However this does not work, the html is added fine but the script fails with the following error: *c._Queuer is not a constructor [Break on this error] if(!window._ate){var _atd="www.addthis...(c) 2008, 2009, 2010 Add This, LLC / addthi...wallweb (line 2) Any ideas? Thanks

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  • jQuery global variable best practice & options?

    - by Kris Krause
    Currently I am working on a legacy web page that uses a ton of javascript, jquery, microsoft client javascript, and other libraries. The bottom line - I cannot rewrite the entire page from scratch as the business cannot justify it. So... it is what it is. Anyway, I need to pollute (I really tried not too) the global namespace with a variable. There are the three options I was thinking - Just store/retrieve it using a normal javascript declaration - var x = 0; Utilize jQuery to store/retrieve the value in a DOM tag - $("body").data("x", 0); Utilize a hidden form field, and set/retrieve the value with jQuery - $("whatever").data("x", 0); What does everyone think? Is there a better way? I looked at the existing pile of code and I do not believe the variable can be scoped in a function.

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  • Getting java.lang.OutOfMemoryError: Java heap space

    - by user1371176
    I am getting an Exception in thread "HSQLDB Connection @3c50507" java.lang.OutOfMemoryError: Java heap space, when running a JSP. what is the thing that is out of memory? eclipse, HSQLDB or Tomcat?? i am using all that in a Mac OS X 10.7.4 When i start HSQLDB, then i get by console this exception: [Server@122ce908]: From command line, use [Ctrl]+[C] to abort abruptly Exception in thread "HSQLDB Connection @2e716cb7" java.lang.OutOfMemoryError: Java heap space at org.hsqldb.lib.HsqlByteArrayOutputStream.ensureRoom(Unknown Source) at org.hsqldb.rowio.RowOutputBinary.ensureRoom(Unknown Source) at org.hsqldb.lib.HsqlByteArrayOutputStream.write(Unknown Source) at org.hsqldb.rowio.RowOutputBinary.writeByteArray(Unknown Source) at org.hsqldb.rowio.RowOutputBinary.writeBinary(Unknown Source) at org.hsqldb.rowio.RowOutputBase.writeData(Unknown Source) at org.hsqldb.Result.write(Unknown Source) at org.hsqldb.Result.write(Unknown Source) at org.hsqldb.ServerConnection.run(Unknown Source) at java.lang.Thread.run(Thread.java:680) What does this all mean?

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  • CDOSYS and Unicode in the from field - vbScript.

    - by Simmo
    I've got the code below, and I'm trying to set the from field to allow unicode. Currently in my email client I get "??". The subject line and any content shows the unicode correctly. And looking at the MSDN the property should be "urn:schemas:httpmail:from". Anyone solved this issue? Thanks M Dim AC_EMAIL : AC_EMAIL = "[email protected]" Dim AC_EMAIL_FROM : AC_EMAIL_FROM = "?? <[email protected]>" Dim strSubject : strSubject = """??"" testing testing" set oMessage = WScript.CreateObject("CDO.Message") With oMessage .BodyPart.charset = "utf-8" 'unicode-1-1-utf-8 .Fields("urn:schemas:httpmail:from") = AC_EMAIL_FROM .Fields("urn:schemas:httpmail:to") = AC_EMAIL .Fields("urn:schemas:httpmail:subject") = strSubject .Fields.Update .Send End With Set oMessage = Nothing

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  • Null object that is not null

    - by Guillaume
    Hello, I use 2 threads to act like a produce/consumer using double queue (http://www.codeproject.com/KB/threads/DoubleQueue.aspx). Sometimes in my 2nd thread, I get an object that is NULL but it should not be as I filled it in the first thread. I tried this: if(myObject.Data == null) { Console.WriteLine("Null Object") // <-- Breakpoint here } When I my break point hits, I can watch myObject.Data and indeed it's NULL, but when I hit F10 and then go to the next line (which is } ) myObject.Data is not NULL. I also added a lock on myObject before if .... to be sure that no one whould use this object. How is that possible and what can I do ?

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  • Javascript - why do I sometimes fail to read file content with GDownloadUrl?

    - by Daj pan spokój
    Hi everybody. I try to read some file with google's GDownloadUrl and it works only from time to time. failure means fileRows == "blah blah" success means fileRows == (real file content) I've noticed, however, that when I cease (with Firebug) the execution on line 3 for a couple of seconds, it succeeds more often. Maybe it is some kind of threading bug, then? Do You guys have any tip or idea? 1 var fileContent = "blah blah"; 2 availabilityFile = "input/available/" + date + ".csv"; 3 GDownloadUrl(availabilityFile, function(fileData) { 4 fileContent = fileData; 5 }); 6 fileRows = fileContent.split("\n");

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  • Error details in embedded IronPython

    - by Achim
    Hi, I'm executing IronPython in my application. A script produces an UnboundNameException with the message "name 'source' is not defined". Because the script is correct in my opinion I would need more error information, but I'm not able to get them from the exception. The exception itself seems not to contain any information about line number of the source of the exception or something like this. I searched on Google, but all available information seems to be outdated. The Data dictionary of my exception is empty which means that Data["PythonExceptionInfo"] does not exist. The file version of my IronPython assembly is 2.0.20209.0 Any hint how to get more error details? cheers, Achim

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  • Mac OS X, Can't start/stop MySQL via System Preferences

    - by Steve Kuo
    I downloaded and installed MySQL 5.1.47 for OS X 10.6 using the DMG archive: mysql-5.1.47-osx10.6-x86_64.dmg I also installed MySQL.prefPane and MySQLStartupItem.pkg. MySQL.prefPane is a Preference Pane. The problem is, whenever I attempt to start/stop MySQL from the Preference Pane, System Preferences just hangs. It runs at about 50% CPU forever, eventually I have for force quit System Preferences. The same thing happens if I toggle "Automatically Start MySQL Server on Startup". Basically the MySQL Preference Pane is not functional. Note that I have no problem starting MySQL from the command line: sudo /usr/local/mysql/bin/mysqld_safe I have tried reinstalling MySQL and the Preference Pane. I'm using the standard installation location, nothing out of the ordinary. Every time the MySQL Preference Pane just hangs. I'm doing this on a Macbook Pro (Intel) running OS X 10.6.3. There are no old versions of MySQL on this machine.

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  • WCSF vs MEF, What's Best For Me?

    - by Galilyou
    Hey fellows, I'm working on a large web application that includes many modules (CRM, Inventory, Administration, etc.) What I want to accomplish is to be able develop each of these modules independently (the UI, Core Logic, DataAccess Logic, and all) and then integrate them all together into a core module (this integration should only be a change in the configuration file). For example, if I have a core module named Host, I should be able to add the CRM module to the host module by simply adding this line to the host's configuration file: <module name="CRM" /> I did some reading on the WCSF, and found that it can help integrate some modules together, but it really doesn't offer so much help in terms of integrating those UI elements. Some friends suggested MEF for the job, but I haven't looked at that yet. What do you guys think? Is it possible to achieve this level of modularity, and how much work do I have to put into it to get it working?

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  • Error When Creating CLF Function

    - by Julio Miranda
    I've created an C# class that contains 2 static method and I successfully created an Assembly in SQL 2005. When I try to create a table-valued function from that Assembly I get the following error: Msg 6509, Level 16, State 36, Procedure , Line 2 An error occurred while gathering metadata from assembly '' with HRESULT 0x80004005. We have other CLR functions that are that are with in the same dll and seem to work fine. I tried to emulate what the other functions are doing, but I can't seem to get this function to work. All the documentation online doesn't seem to help

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  • latex undefined control sequence with tableofcontents

    - by munchybunch
    I was using \documentclass{amsmath} for awhile with no issues, but I recently wanted to switch to the normal \documentclass{article} because I thought it looked nicer. However, now my \tableofcontents command produces this error: ! Undefined control sequence. <argument> \tocsection {}{1}{Purpose} l.1 ...ne {section}{\tocsection {}{1}{Purpose}}{4} ? I'm writing a research paper with latex, and Purpose is the first section (the command I'm using is \section{Purpose}). It's saying line 1 has the error, which is \documentclass{article}. Can anyone help me with this error?

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  • M2Eclipse and EAR projects on Weblogic

    - by Steve
    How can I import a maven EAR project into Eclipse 3.4, and be able to use the IDE (WTP) to deploy the ear successfully to Weblogic (9.2)? The main issue is that the dependent jars are not being included in the ear (under APP-INF/lib) when it gets deployed through the IDE. When I build from command line, the ear is exactly how I want it. I am using the APP-INF/lib configuration for the ear plugin, and have included the jarModule sections for all the required jars. When editing the eclipse EAR project's Java EE components, all the jars are listed, but not in the APP-INF/lib. Only when I open a dependent jar project do those specific jars get set under that subfolder. All the 3rd party jars are showing they will end up in the wrong place. If you need more info, just let me know. Thanks!

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