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• Equivalent of IllegalArgumentException of Java in C++

  - by vito

  In Java if an input argument to a method is invalid, we can throw an IllegalArgumentException (which is of type RuntimeException). In C++, there is no notion of checked and unchecked exceptions. Is there a similar exception in standard C++ which can be used to indicate a runtime exception? Or is there a common style not in the standard but everyone follows in practice for a situation like this? Or, should I just create my own custom exception and throw it?

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• List and ReadOnly property

  - by Luca

  List (and List) instances can be readonly, seeing ReadOnly property; methods throws exceptions in the case the collection have the property ReadOnly property. How can I create readonly List instances? What are the main uses?

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• Propel automatic form

  - by martin.malek

  Hi, I'm just starting with Propel and for more rapid development I'm curious if there is anything like automatic forms. Something like default administration in Django. I want to be able to output a form or to get all information I'll need. Even in the objects I didn't find all information which should be necessary to have everything for the form (name, type, length, related object, etc).

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• How to show user-friendly error page instead of tomcat log with stack trace in browser when runtime

  - by Roman

  I'm developing web-application with JSF. I tested it as I was able to but from time to time runtime exceptions are thrown. So, how to redirect user to special error page every time an exception is thrown (instead of displaying 500 Error with full tomcat logs)?

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• Setting of IIS memory settings for ASP.NET

  - by user54064

  We are running an ASP.NET app on a web server with 4GB+ of memory in IIS 6. After reading many articles, it states that we need to set the "maximum memory used" for the Application Pool to 800mb to eliminate the "out of memory exceptions" that are happening for us. However, what should the "maximum virtual memory" in the Application Pool be set to? I can't find information as to what that should be set to.

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• How do I find where an exception was thrown in C++?

  - by Alex

  I have a program that throws an uncaught exception somewhere. All I get is a report of an exception being thrown, and no information as to where it was thrown. It seems illogical for a program compiled to contain debug symbols not to notify me of where in my code an exception was generated. Is there any way to tell where my exceptions are coming from short of setting 'catch throw' in gdb and calling a backtrace for every single thrown exception?

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• Why do most web hosting services support only php as server-side language?

  - by HJ-INCPP

  Hello, I have been working with java and python, so I found a nice web host which has support for these. But my question is, why can you find so hard such hosts? I understand that php is easy, I also understand that oracle host is hard to find ($$$ of course), but what do they have against some good open-source, completely free java spring, jsp, django, python, ror, perl etc etc .... So rare to find hosts ... not to mention freelancer bids Thank you.

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• Is it possible to bulk load an NDB child Entity in GAE?

  - by hmacread

  At some point in the future I may need to bulk load migration data (i.e. from a CSV). Has anyone had exceptions raised doing the following? Also is there any change in behaviour if the ndb.put_multi() function is used? from google.appengine.ext import ndb while True: if not id: break id, name = read_csv_row(readline()) x = X(parent=ndb.Key('Y','static_id') x.id, x.name = id, name x.put() class X(ndb.Model): id = StringProperty() name = StringProperty() class Y(ndb.Model): pass def read_csv_row(line): """returns tuple"""

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• Passing values into regex match function

  - by Tim

  In python (it's a Django filter), I'm doing this: lReturn = re.sub(r'\[usecase:([ \w]+)]', r'EXTEND WITH <a href="/usecase/%s/\1/">\1</a>' % pCurrentProjectName, lReturn) I'd like to use a function instead of a string (so I can check that the usercase is a valid name), so it would change to this: def _match_function(matchobj): lMatch = matchobj.group(1) return "EXTEND WITH <a href='/usecase/%s/%s/'>%s</a>" % (pCurrentProjectName, lMatch, lMatch) lReturn = re.sub(r'\[usecase:([ \w]+)]', _match_function, lReturn) How do I get pCurrentProjectName into the _match_function() function?

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• Getting source code information from groovy stack trace

  - by dotsid

  When exception generated I want to show some additional information (source code) for particular exception. But grails have very hairy exceptions (it's all about groovy dynamic nature). It's my problem where to get and how to display source code. All I need is file/line information. So... Is there any possibility to get file and line where exception were generated in grails/groovy?

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• web deploy causing bad image exception

  - by chuck taylor

  I have an asp.net web application that uses an unmanaged 32 bit dll that I have successfully running on my development machine, but when I use web deploy to move the code to our test server, I start seeing BadImageFormat exceptions. I set the target in visual web developer to x86 and both machines are running 64 bit os's (windows 7 and windows server 2008 r2). I'm not sure what other differences there could be causing the problem. Thanks for any help you can provide.

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• Where to start when getting into web application development

  - by Aaron

  I am looking to get into web application development. I am an undergrad CS major with experience in programming desktop apps, but with only basic knowledge regarding how web apps work. Any suggestions of where to start? Javascript, php, perl, ruby, python? Should I look into frameworks like django, seaside, ruby on rails, etc at first or wait until I am more experienced to use those?

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• Is there a way to make eclipse report a general "catch (Exception e)" as an error/warning (in java)?

  - by Rog

  I'm trying to encourage a best practice of not catching general exceptions in Java code. eg: try { ... } catch (Exception e) { // bad! ... } Is there a way to flag this as an error/warning in Eclipse? I know PMD picks this up, but I'd rather avoid integrating it into everyone's build environment at the moment.

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• using ref to view error

  - by Avram

  Hello. I working now on firm that using ref in every function. The reason, is to catch errors. There example : //return true if the read is success //otherwise writing to the error ,the problem bool ReadFile(ref string error) Question: How do you catching errors? Using ref,exceptions or other way?

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• What CSS compiler do you use (SASS, Less, HSS, etc)?

  - by T.R.

  I've been looking to make things a little more DRY, both on my personal projects (django) and at work (JSP/struts,PHP). SASS+HAML seem to be quite popular, but, do those outside of the Ruby/Rails community generally use these as well, or do they opt for other solutions? Which do you use, and what was the reasoning behind the choice?

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• Good Way to Debug Visual Studio Designer Errors

  - by Daisuke Shimamoto

  Hi, Does anyone know a good way to debug errors in the Visual Studio Designer? In our project we have tons of UserControls and many complex forms. For the complex ones, the Designer often throws various exceptions which doesn't help much and was wondering if there's some nice way to figure out what has gone wrong. The language is C# and we're using Visual Studio 2005. Thanks, Daisuke

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• Is there a template engine for Node.js?

  - by Seb

  I'm kind of falling in love with Node.js not because you write app code in javascript but because of its performance. I really don't care a lot about how beautiful a server side language might be but how much requests per second it can handle. So anyway I'm looking forward to experiment building an entire webapp using Node.js (and going back to the actual question) is there a template engine similar to let's say the django template engine or something similar (that at least allows you to extend base templates) available for Node.js?

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• Why do some APIs provide mostly interfaces, not classes?

  - by Lord Torgamus

  Some Java APIs provide a large number of interfaces and few classes. For example, the Stellent/Oracle UCM API is composed of roughly 80% interfaces/20% classes, and many of the classes are just exceptions. What is the technical reason for preferring interfaces to classes? Is it just an effort to minimize coupling? To improve encapsulation/information hiding? Something else?

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• Logging Exception in XML file

  - by Sathish

  I have a webservice and want to implement Exception handling block to that and want to log the exceptions in an xml flat file in application path. Can anyone provide me the example for this

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• SmtpClient.SendAsync(); Does not work anymore.

  - by j-t-s

  Hi All, I have recently purchased a new computer, and now my e-mails never get sent, and there are NEVER any exceptions thrown or anything. Can somebody please provide some samples that work using the SmtpClient class? Any help at all will be greatly appreciated. Thank you

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• How to reference a class that implements certain interface?

  - by vikp

  Hi, I have an interface for logging the exceptions, i.e. IExceptionLogger. This interface has 3 implementations: DBExceptionLogger, XMLExceptionLogger, CSVExceptionLogger. I have an application that will make a use of DBExceptionLogger. The application references only IExceptionLogger. How do I create an instance of DBExceptionLogger within the application. I can't reference the DBExceptionLogger directly since it will break the purpose of having IExceptionLogger interface. Thanks

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• webprogramming -what is the learning pathway ?

  - by Bunny Rabbit

  i have some knowledge of css,jQuery,Grails,django,servlets and jsp still i can't see me designing good professional looking websites .what am lacking ? should i start learning jQUery ui ,should i get into adobe products like flash i am pretty confused. i am pretty bad in the userinterface part,

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• Java Flow Control Problem

  - by Kyle_Solo

  I am programming a simple 2d game engine. I've decided how I'd like the engine to function: it will be composed of objects containing "events" that my main game loop will trigger when appropriate. A little more about the structure: Every GameObject has an updateEvent method. objectList is a list of all the objects that will receive update events. Only objects on this list have their updateEvent method called by the game loop. I’m trying to implement this method in the GameObject class (This specification is what I’d like the method to achieve): /** * This method removes a GameObject from objectList. The GameObject * should immediately stop executing code, that is, absolutely no more * code inside update events will be executed for the removed game object. * If necessary, control should transfer to the game loop. * @param go The GameObject to be removed */ public void remove(GameObject go) So if an object tries to remove itself inside of an update event, control should transfer back to the game engine: public void updateEvent() { //object's update event remove(this); System.out.println("Should never reach here!"); } Here’s what I have so far. It works, but the more I read about using exceptions for flow control the less I like it, so I want to see if there are alternatives. Remove Method public void remove(GameObject go) { //add to removedList //flag as removed //throw an exception if removing self from inside an updateEvent } Game Loop for(GameObject go : objectList) { try { if (!go.removed) { go.updateEvent(); } else { //object is scheduled to be removed, do nothing } } catch(ObjectRemovedException e) { //control has been transferred back to the game loop //no need to do anything here } } // now remove the objects that are in removedList from objectList 2 questions: Am I correct in assuming that the only way to implement the stop-right-away part of the remove method as described above is by throwing a custom exception and catching it in the game loop? (I know, using exceptions for flow control is like goto, which is bad. I just can’t think of another way to do what I want!) For the removal from the list itself, it is possible for one object to remove one that is farther down on the list. Currently I’m checking a removed flag before executing any code, and at the end of each pass removing the objects to avoid concurrent modification. Is there a better, preferably instant/non-polling way to do this?

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• Entity framework: Need a easy going, clean database migration solution.

  - by user469652

  I'm using entity framework model first development, and I need to do database migration often, The EF database generation power pack doesn't help a lot, because that data migration never worked here. The database migration here I mean, change the model, and then I can update the existing database from the model, but creating a new one. Is there any free of charge tool here invented here yet? Or would this going to be a new feature of next EF release? PS: I love django's ORM.

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• MonoTouch on Device - Vibrates at launch?

  - by Driss Zouak

  I just deployed my app to my iPhone for the first time. Every time it launches it vibrates before running, and it runs fine. The build is a Debug | iPhone one of my app. Any ideas why it vibrates when it launches and how to stop that? It's definitely not something I coded up and I don't have any exceptions or issues when running in the simulator.

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