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• Is it worth it to learn an esoteric programming language?

  - by Thomas Owens

  Wikipedia: An esoteric programming language (sometimes shortened to esolang) is a programming language designed as a test of the boundaries of computer programming language design, as a proof of concept, or as a joke. There is usually no intention of the language being adopted for real-world programming. Such languages are often popular among hackers and hobbyists. This use of esoteric is meant to distinguish these languages from more popular programming languages. Some more popular languages may appear esoteric (in the usual sense of the word) to some, and though these could arguably be called "esoteric programming languages" too, this is not what is meant. I think it might be worth it, just to learn a new language and go through the process, although only if you don't have anything else to do (like a real project or learning a new real language). But what does the community think? Is there some value in these languages?

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• A public web API: What do developers prefer to consume?

  - by spender

  We've got a bunch of data that we'd like to expose to the world hosted on an asp-net.mvc website. I'd like to ensure that we deliver it using technology that is easy for end developers to implement and not tied to any particular platform, rather than using technology that is unpopular/incompatible with developers. The kind of requests we expect are mainly to retrieve search results (not many parameters), but down the like we'd like to be able to provide catalogue lookups and the like, which may be more complex. Bearing this in mind, what is the preferred means of doing this?

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• Accurate Timings with Oscilloscopes on PC

  - by Paul Bullough

  In the world of embedded software (firmware) it is fairly common to observe the order of events, take timings and optimise a program by getting it to waggle PIO lines and capturing their behavior on an oscilloscope. In days gone by it was possible to toggle pins on the serial and parallel ports to achieve much the same thing on PC-based software. This made it possible to capture host PC-based software events and firmware events on the same trace and examine host software/firmware interactions. Now, my new laptop ... no serial or parallel ports! This is increasingly the case. So, does anyone have any suggestions as to go about emitting accurate timing signals off a "modern" PC? It strikes me that we don't have any immediately programmable, lag-free output pins left. The solution needs to run off a laptop, so using add-on cards that only plug into desktops are not permitted.

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• How can I pause the console window in .pl and .bat file?

  - by Nano HE

  As I know, when I run cs myConsoleApp.cs from windows command line, I can pause the Console Window by add the code below: Console.ReadLine(); Then How can I pause Console Window in myConsoleApp.pl and myConsoleApp.bat? I just want to monitor the running result from the Console window. Thank you. Suppose myConsoleApp.bat like this: taskkill /f /im "E1.exe" taskkill /f /im "E2.exe" pause Suppose myConsoleApp.pl like this: use strict; use warnings; print "Hello World!"; <>;

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• Processing files with C# in folders whose names contain spaces

  - by Nigel Ainscoe

  There are plenty of C# samples that show how to manipulate files and directories but they inevitably use folder paths that contain no spaces. In the real world I need to be able to process files in folders with names that contain spaces. I have written the code below which shows how I have solved the problem. However it doesn't seem to be very elegant and I wonder if anyone has a better way. class Program { static void Main(string[] args) { var dirPath = @args[0] + "\\"; string[] myFiles = Directory.GetFiles(dirPath, "*txt"); foreach (var oldFile in myFiles) { string newFile = dirPath + "New " + Path.GetFileName(oldFile); File.Move(oldFile, newFile); } Console.ReadKey(); } } Regards, Nigel Ainscoe

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• Using Java server-side with PHP-generated front-end

  - by Storm

  Hi!  Does anyone have a real-world experience in building such a project? I'd like to move away questions about "is it good idea or not", but focus on possible solutions. I see one simple way - HTTP GET/POST + xml/json - and one more elegant - AJAX/DWR. As for the first one - I understand that it is possible, but needs quite a lot coding. As for second way - is it possible to use Java DWR engine with PHP front-end? Is DWR language-independent for client side (as it uses just JavaScript)?  Would it be a problem, that client page was generated by one web server (for example, apache+php) and served on server-side by another (for example, tomcat)? I suspect, that Tomcat will complain about sessions. Can this problem be fixed with allowing cross-domain AJAX? Thank you in advance. Denis.

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• Create My own language with "Functional Programming Language"

  - by esehara

  I prefer Haskell. I already know How to create my own language with Procedural Language (for example: C, Java, Python, etc). But, I know How to create my own language with Functional Language (for example Haskell, Clojure and Scala). I've already read: Internet Resources Write Yourself a Scheme in 48 Hours Real World Haskell - Chapter 16.Using Persec Writing A Lisp Interpreter In Haskell Parsec, a fast combinator parser Implementing functional languages: a tutorial Books Introduction Functional Programming Using Haskell 2nd Edition -- Haskell StackOverflow (but with procedural language) Learning to write a compiler create my own programming language Source Libraries and tools/HJS -- Haskell Are there any other good sources? I wants to get more links,or sources.

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• Looking for a better way to integrate a static list into a set of classes

  - by EvilTeach

  I'm trying to expand my sons interest from Warcraft 3 programming into C++ to broaden his horizons to a degree. We are planning on porting a little game that he wrote. The context goes something like this. There are Ships and Missiles, for which Ships will use Missiles and interact with them A Container exists which will hold 'a list' of ships. A Container exists which will hold 'a list' of planets. One can apply a function over all elements in the Container (for_each) Ships and Missles can be created/destroyed at any time New objects automatically insert themselves into the proper container. I cobbled a small example together to do that job, so we can talk about topics (list, templates etc) but I am not pleased with the results. #include <iostream> #include <list> using namespace std; /* Base class to hold static list in common with various object groups */ template<class T> class ObjectManager { public : ObjectManager ( void ) { cout << "Construct ObjectManager at " << this << endl; objectList.push_back(this); } virtual ~ObjectManager ( void ) { cout << "Destroy ObjectManager at " << this << endl; } void for_each ( void (*function)(T *) ) { for (objectListIter = objectList.begin(); objectListIter != objectList.end(); ++objectListIter) { (*function)((T *) *objectListIter); } } list<ObjectManager<T> *>::iterator objectListIter; static list<ObjectManager<T> *> objectList; }; /* initializer for static list */ template<class T> list<ObjectManager<T> *> ObjectManager<T>::objectList; /* A simple ship for testing */ class Ship : public ObjectManager<Ship> { public : Ship ( void ) : ObjectManager<Ship>() { cout << "Construct Ship at " << this << endl; } ~Ship ( void ) { cout << "Destroy Ship at " << this << endl; } friend ostream &operator<< ( ostream &out, const Ship &that ) { out << "I am a ship"; return out; } }; /* A simple missile for testing */ class Missile : public ObjectManager<Missile> { public : Missile ( void ) : ObjectManager<Missile>() { cout << "Construct Missile at " << this << endl; } ~Missile ( void ) { cout << "Destroy Missile at " << this << endl; } friend ostream &operator<< ( ostream &out, const Missile &that ) { out << "I am a missile"; return out; } }; /* A function suitable for the for_each function */ template <class T> void show ( T *it ) { cout << "Show: " << *it << " at " << it << endl; } int main ( void ) { /* Create dummy planets for testing */ Missile p1; Missile p2; /* Demonstrate Iterator */ p1.for_each(show); /* Create dummy ships for testing */ Ship s1; Ship s2; Ship s3; /* Demonstrate Iterator */ s1.for_each(show); return 0; } Specifically, The list is effectively embedded in each ship though the inheritance mechanism. One must have a ship, in order to access the list of ships. One must have a missile in order to be able to access the list of missiles. That feels awkward. My question boils down to "Is there a better way to do this?" Automatic object container creation Automatic object insertion Container access without requiring an object in the list to access it. I am looking for better ideas. All helpful entries get an upvote. Thanks Evil.

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• On reference_wrapper and callable objects

  - by Nicola Bonelli

  Given the following callable object: struct callable : public std::unary_function &lt;void, void&gt; { void operator()() const { std::cout << "hello world" << std::endl; } }; a std::tr1::reference_wrapper< calls through it: callable obj; std::tr1::ref(obj)(); Instead, when the operator() accepts an argument: struct callable : public std::unary_function &lt;int, void&gt; { void operator()(int n) const { std::cout << n << std::endl; } }; std::tr1::bind accepts a reference_wrapper to it as a callable wrapper... callable obj; std::tr1::bind( std::tr1::ref(obj), 42 )(); but what's wrong with this? std::tr1::ref(obj)(42);

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• Procedure or function expects parameter which was not supplied

  - by eftpotrm

  Driving me mad on a personal project; I know I've done this before but elsewhere and don't have the code. As far as I can see, I'm setting the parameter, I'm setting its value, the connection is open, yet when I try to fill the dataset I get the error 'Procedure or function expects parameter "@test" which was not supplied'. (This is obviously a simplified test! Same error on this or the real, rather longer code though.) C#: SqlCommand l_oCmd; DataSet l_oPage = new DataSet(); l_oCmd = new SqlCommand("usp_test", g_oConn); l_oCmd.Parameters.Add(new SqlParameter("@test", SqlDbType.NVarChar)); l_oCmd.Parameters[0].Value = "hello world"; SqlDataAdapter da = new SqlDataAdapter(l_oCmd); da.Fill(l_oPage); SQL: create procedure usp_test ( @test nvarchar(1000) ) as select @test What have I missed?

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• Using TextOptions.TextFormattingMode with FormattedText

  - by dan gibson

  With WPF4 you can have non-blurry text by adding TextOptions.TextFormattingMode="Display" and TextOptions.TextRenderingMode="Aliased" to your xaml: <Window TextOptions.TextFormattingMode="Display" TextOptions.TextRenderingMode="Aliased"> This works fine for me except for when I draw text with DrawingContext.DrawText like this: void DrawText(DrawingContext dc) { FormattedText ft = new FormattedText("Hello World", System.Globalization.CultureInfo.CurrentCulture, System.Windows.FlowDirection.LeftToRight, new Typeface(FontFamily, FontStyle, FontWeight, FontStretch), FontSize, brush); dc.DrawText(ft, new Point(rect.Left, rect.Top)); } How can I draw non-blurry text with FormattedText? ie I want TextOptions.TextFormattingMode="Display" and TextOptions.TextRenderingMode="Aliased" to be used.

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• How do I limit the permissions of a C# program to read only on an SQLServer Database?

  - by gav

  Hi Guys, I have written some C# which connects to a live production database. I want to give my application read only access to the DB but am unsure how to achieve this. Is there any trivial way to get this done by amending the connection string? My understanding is that the application will logon with the credentials of the person running the application and hence may or may not have write access to the db based on that fact. Can I statically limit the permissions of the application so that if someone changes the program to do something devastating at a later date any manipulation will fail? Apologies for how trivial the question may be but it's my first venture into the world of MS programming. Thanks, Gav

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• spring 3 mvc requestmapping dynamic param problem

  - by Faisal khan

  I have the following code which works fine with http://localhost:8080/HelloWorldSpring3/forms/helloworld but i want to have url have some thing like this http://localhost:8080/HelloWorldSpring3/forms/helloworld/locname_here/locid_here I found that adding this @RequestMapping("/helloworld/**") will work but when i try to access http://localhost:8080/HelloWorldSpring3/forms/helloworld/locname_here/locid_here it is not found. Web.xml entry as follows <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/forms/*</url-pattern> </servlet-mapping> Mapping bean entry @RequestMapping("/helloworld/**") public ModelAndView helloWord(){ String message = "Hello World, Spring 3.0!"; return new ModelAndView("helloworld", "message",message); }

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• Tips on refactoring existing .net applications to support localization?

  - by Lee Warner

  We're going global. I've been tasked with refactoring our existing products to support localization. Last week I shunned using resource files (.resx) in favor of a home-baked database look-up method. After hitting a serious snag with that, I'm back to the microsoft way of using resx. All the documentation I've seen so far details how to create new "World-Ready" applications, but I don't see anything on changing existing applications. Is my only recourse to touch the application form by form and control by control to have it point to newly created resource files? Any good sources/links for internationalizing your apps?

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• How to best integrate HTML/design with C# code in ASP.Net or ASP.Net MVC?

  - by LuftMensch

  We're working on a new ASP.Net site. The last major site we did was in classic ASP--the procedure we used there was to have the HTML completed first, then "bring it to life" with the ASP code. In the ASP.Net world, how does this work? I.e. how do the designers do their work if much of the mark-up is actually being generated by the server controls? We are also looking at ASP.Net MVC as a potential lightweight alternative. Would be very interested to know what was worked best for people in both scenarios in terms of working with the designers and integrating their work with the code.

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• Ext.TabPanel html help...

  - by Simon

  add({ title: args.node.id, iconCls: 'tabs', items: [{html: '<code class="prettyprint"><?php\necho \'Hello World!\';</code>', width: '100%', hieght: '100%', plain: true}], closable: true }).show(); I am running the above method on Ext.TabPanel and it is returning '' as the html... If I do <code class="prettyprint"><html><head><title>Whatever</title></head><body.The body!</body></html></code> It just renders The body!... how can I get it to display the source code?? Many thanks...

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• How to suppress email validation when using SmtpClient and MailMessage

  - by Matthias

  When sending out emails using the SmtpClient and a MailMessage (.net 3.5) the "To" email address(es) get validated prior to sending. I've got a big stack of email addresses which have a dot (.) before the at-sign, causing a FormatException when you attempt to send the message using the SmtpClient. This is actually a good thing, because by specification a dot before the at-sign is invalid. Unfortunately, those emails exist in the real world and they get delivered, if you send them out using your preferred email client. My question is, can email validation through the SmtpClient/MailMessage be suppressed?

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• Is there a production ready web application framework in Python?

  - by peperg

  I heard lots of good opinions about Python language. They say it's mature, expressive etc... Are there any production-ready web application frameworks in Python. By "production ready" I mean : supports objective-relational mapping with caching and declarative desciption (like JPA, Hibernate etc..) controls oriented user interface support - no HTML templates but something like JSF (RichFaces, Icefaces) or GWT, Vaadin, ZK component decomposition and dependency injection (like EJB or Spring) unit and integration testing good IDE support clustering, modularity etc (like Terracota, OSGi etc..) there are successful applications written in it by companies like IBM, Oracle etc (I mean real business applications not Twitter) could have commercial support Is it possible at all in Python world ? Or only choices are : use Python and write everything from the bottom (too expensice) stick to JEE buy .NET stack

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• How do I wrap a selection with an HTML tag in Visual Studio?

  - by dansays

  This seems like the most basic question in the world, but damned if I can find an answer. Is there a keyboard shortcut, either native to Visual Studio or through Code Rush or other third-party plug-in, to wrap the current selection with an HTML tag? I'm tired of typing the opening tag, cutting the misplaced closing tag to the clipboard, moving the cursor, and pasting it at the end where it belongs. Update: This is how TextMate handles surrounding a selection with a tag. Frankly, I'm stunned that Visual Studio doesn't seem to have a similar feature. Creating a macro or snippet for every conceivable tag I might want to use seems absurd.

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• Convert wife/husband/partner to a programmer.

  - by Stefan

  originally posted by Stefan: How many of you have had the thought of educate your partner and invite him/her to the beautiful world of programming? I once started to give my wife lessons twice a week, It was a competition between me and another programmer, we thought it would be nice to have our wives understand why we work as programmers and also have it as a hobby sitting all night long. Maybe we could get our wives to feel the power too? After a couple of months my wife didn't like the idea any more, it was too hard to understand she thought, same for my friends wife. So now we are thinking of some project that would be too fun for our wives to turn down just to get the spirit up again. It would be nice to hand over a project to my wife, "Can you debug this for me, please? There are some strange error on module xxx." :) Maybe I'm crazy, what do you think?

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• Why does gcc add symbols to non-debug build?

  - by Matt Holgate

  When I do a release build with gcc (i.e. I do not specify -g), I still seem to end up with symbols in the binary, and have to use strip to remove them. In fact, I can still breakpoint functions and get backtraces in gdb (albeit without line numbers). This surprised me - can anyone explain why this happens? e.g. #include <stdio.h> static void blah(void) { printf("hello world\n"); } int main(int argc, char *argv[]) { blah(); return 0; } gcc -o foo foo.c nm foo | grep blah: 08048374 t blah

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• Beginning GWT and Java - wich is the best route when coming from LAMP background?

  - by Cambiata

  Hi! I've worked a lot with php/mysql on linux servers, including frameworks, orm etc. Now I want to give GWT and Java a try! Installing GWT SDK, Eclipse plugin etc and running a "Hello world" is no problem... The server is running automagically in the background... But when it comes to setting it up my self, there seems to be confusingly many options. Jetty? Tomcat? Glassfish? How are those related/combinable to/with Apache? Are there any good resources or tutorials for setting up java development and server environments suited for one like me with PHP background? Maybe pointing out the possiblities of running PHP and Java on the same server? Regards / Jonas

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• Mysql stored procedures

  - by Richard M

  Hello, I have a unique issue that I need advice on. I've been writing asp.net apps with SQL Server back ends for the past 10 years. During that time, I have also written some PHP apps, but not many. I'm going to be porting some of my asp.net apps to PHP and have run into a bit of an issue. In the Asp.net world, it's generally understood that when accessing any databases, using views or stored procedures is the preferred way of doing so. I've been reading some PHP/MySQL books and I'm beginning to get the impression that utilizing stored procedures in mysql is not advisable. I hesitate in using that word, advisable, but that's just the felling I get. So, the advice I'm looking for is basically, am I right or wrong? Do PHP developers use stored procedures at all? Or, is it something that is shunned? Thanks in advance.

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• Problem extracting text from RSS feeds

  - by Gautam

  Hi, I am new to the world of Ruby and Rails. I have seen rails cast 190 and I just started playing with it. I used selector gadget to find out the CSS and XPath I have the following code.. require 'rubygems' require 'nokogiri' require 'open-uri' url = "http://www.telegraph.co.uk/sport/football/rss" doc = Nokogiri::HTML(open(url)) doc.xpath('//a').each do |paragraph| puts paragraph.text end When I extracted text from a normal HTML page with css, I could get the extracted text on the console. But when I try to do the same either with CSS or XPath for the RSS Feed for the following URL mentioned in the code above, I dont get any output. How do you extract text from RSS feeds?? I also have another silly question. Is there a way to extract text from 2 different feeds and display it on the console something like url1 = "http://www.telegraph.co.uk/sport/football/rss" url2 = "http://www.telegraph.co.uk/sport/cricket/rss" Looking forward for your help and suggestions Thank You Gautam

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• Java: using endpoint to publish webservice to tomcat server

  - by Will

  hi all, i am creating a simple SOAP web service. i am to ensure that it runs on a tomcat web service. im trying to implement this with JAX-WS (see code) my question is: does the Endpoint.publish use the tomcat server to host this or is it a mini glassfish kind of server? should i be extending UnicastRemoveObject or something similiar instead? ideally it would be able to be packaged into a .WAR and dropped in the directory and just work. It doesn't seem to work with my installed tomcat server as is because it says the port is already in use. I'm using Ubuntu karmic with the tomcat6 package installed, it could also be my user doesnt have permissions to publish to the running tomcat on 8080 i hope this question is clear enough sample code: @WebService public class UserAttributes { public static void main(String[] args) { UserAttributes instance = new UserAttributes(); Endpoint.publish("http://localhost:8082/WebServices/userattributes", instance); } public string Hello() { return "Hello World"; } }

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