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• PropertyInfo SetValue and nulls

  - by Nelson

  If I have something like: object value = null; Foo foo = new Foo(); PropertyInfo property = Foo.GetProperties().Single(p => p.Name == "IntProperty"); property.SetValue(foo, value, null); Then foo.IntProperty gets set to 0, even though value = null. It appears it's doing somemething like IntProperty = default(typeof(int)). I would like to throw an InvalidCastException if IntProperty is not a "nullable" type (Nullable< or reference). I'm using Reflection, so I don't know the type ahead of time. How would I go about doing this?

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• Using nodereference + views to create combined view

  - by Ian Silber

  I'm trying to set up a relational View but not sure how to do it. Here's an example of what I'm going for using the node types Artist and Song. Artist Song Length Bob Dylan Like a Rolling Stone 2:00 Bruce Springsteen Atlantic City 4:00 Burce Springsteen Born to Run 5:24 Van Morrison Domino 3:22 Van Morrison Brown Eyed Girl 4:30 Assuming I have an Artist node type that has a node reference to Song (set to unlimited) and a Song data type with an additional field for length, how would I go about configuring the view to output this view? Thanks! Ian

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• Clone LINQ To SQL object Extension Method throws object dispose exception....

  - by gtas

  Hello all, I have this extension method for cloning my LINQ To SQL objects: public static T CloneObjectGraph<T>(this T obj) where T : class { var serializer = new DataContractSerializer(typeof(T), null, int.MaxValue, false, true, null); using (var ms = new System.IO.MemoryStream()) { serializer.WriteObject(ms, obj); ms.Position = 0; return (T)serializer.ReadObject(ms); } } But while i carry objects with not all references loaded, while qyuerying with DataLoadOptions, sometimes it throws the object disposed exception, but thing is I don't ask for references that is not loaded (null). e.g. I have Customer with many references and i just need to carry on memory the Address reference EntityRef< and i don't Load anything else. But while i clone the object this exception forces me to load all the EntitySet< references with the Customer object, which might be too much and slow down the application speed. Any suggestions?

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• Jquery and binding an event to an iframe

  - by dbr

  **I'm currently using a jquery textselect plugin to fire alerts based on the selection text anywhere on the page and it works just fine doing something like: $(document).ready(function() { $(document).bind('textselect', function(e) { alert(e.text); }); }); I've since had to add an iframe to the page and I need the text selection to work on text within the iframe as well. I'm trying to do something like this but it's not working: $(document).ready(function() { $('#iframeId').load(function() { $(document.getElementById("iframeId").contentWindow).bind('textselect',function(e) { alert(e.text); }); }); At this point I've tried a whole mess of ways to reference the iframe document without any success. Any ideas?**

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• How much do politics/office intrigue interfere with your day to day tasks at work?

  - by Michael Dorgan

  I'm currently blessed to be employed at a location where politics are pretty much non-existant and management overhead is nearly nil. As I've only worked at this one location for my entire, lengthy career, I have very little frame of reference outside of an occasional Dilbert comic or offhand comment from others about just how bad office politics and management interference get in the way of getting your code done elsewhere. While I'm not actively looking for a new job, this one point has made me quite reluctant to even look seriously elsewhere. My question is, just how much are politics a way of life in larger companies - in or out of the game industry and how much does it affect your day to day satisfaction?

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• Property in a Windows Forms form class only accessable after Load event

  - by Spooky2010

  I'm instantiating and calling Form B from Form A. FormB has some custom properties, to allow me to pass it things like sqlAdaptors and dataset instances. When i instantiate and show Form B from Form A as a dialog form with a Using statement, it all works fine, but i find the properties i pass are not available in Form B until after the form_load event has fired. I was under the impression the properties when passed to a instantiated class should be available from a constructor, but this is not the case. If it try to access the properties before the form load event i get a null reference exception. Is this correct behavior ?

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• Properly removing an Integer from a List<Integer>

  - by Yuval A

  Here's a nice pitfall I just encountered. Consider a list of integers: List<Integer> list = new ArrayList<Integer>(); list.add(5); list.add(6); list.add(7); list.add(1); Any educated guess on what happens when you execute list.remove(1)? What about list.remove(new Integer(1))? This can cause some nasty bugs. What is the proper way to differentiate between remove(int index), which removes an element from given index and remove(Object o), which removes an element by reference, when dealing with lists of integers? The main point to consider here is the one @Nikita mentioned - exact parameter matching takes precedence over auto-boxing.

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• Need help using ThemeRoller

  - by Music Magi

  Hi - I'm using DataTables to dress up a table I'm using to display XML results based on an XSL transformation. I have everything working from a technical sense (paging, sorting, filtering), but I'm trying to figure out to use a ThemeRoller theme to make it look like they have on their website. So far, I have added the following file to my project with its reference: <link type="text/css" href="css/custom-theme/jquery-ui-1.8.7.custom.css" rel="stylesheet"/> and enabled ThemeRoller themes using the following as per the DataTables website: $(document).ready(function() { $('#mainTable').dataTable( { "bJQueryUI": true, "sPaginationType": "two_button" }); }); The table gets styled, but it doesn't look right with the header rows being too wide and things being on multiple lines that should be on one line. Any indication as to what I'm doing wrong? Thanks very much in advance.

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• When does a MySQL Query actually execute in PHP?

  - by MJB

  This sounds like a really simple question, but I am new to PHP. If I have a statement like this: $r =& $db->query("insert into table (col1, col2) values (10, 20)"); Do I have to still execute it, or does it get executed when I reference it? I have another case where I have a select query, which seems logically to run only when I call fetchrow, but the code I am presented with (to fix) does not call execute or fetch.I would have expected it to, so I cannot tell if it is just that I don't get it, or that the missing execute statement is the problem. It also does not insert the record, but it does not throw an error I can find. Also, I am a little confused by the =& notation. I looked it up on google, and found a few mentions of it, but I am still not clear on it. Thanks.

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• how to set html table max-width?

  - by George2

  Hello everyone, I have an html table, and one column (<td>) has long text, so I want to set the max-width of the column -- so that if text is longer than the max-width, the text could auto-wrap to next line. I have tried to use css max-width style on related TD element of the column, something like "max-width:100px", but it does not work (text still very long and not auto-wrap to next line if it is very long). Any ideas what is wrong or any solution reference code? I am using IE 8 on Windows 7. thanks in advance, George

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• boost for each problem

  - by areslp

  std::map< std::string , std::string > matrix_int; typedef std::pair< std::string , std::string > lp_type; BOOST_FOREACH( lp_type &row, matrix_int ){ } this can not be complied: error C2440: 'initializing' : cannot convert from 'std::pair<_Ty1,_Ty2' to 'lp_type &' when I have ',' in element type, boost doc says I can use typedef or predefine a var; but what should I do when I want to get a reference?

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• Using C# Type as generic

  - by I Clark

  I'm trying to create a generic list from a specific Type that is retrieved from elsewhere: Type listType; // Passed in to function, could be anything var list = _service.GetAll<listType>(); However I get a build error of: The type or namespace name 'listType' could not be found (are you missing a using directive or an assembly reference?) Is this even possible or am I setting foot onto C# 4 Dynamic territory? As a background: I want to automatically load all lists with data from the repository. The code below get's passed a Form Model whose properties are iterated for any IEnum (where T inherits from DomainEntity). I want to fill the list with objects of the Type the list made of from the repository. public void LoadLists(object model) { foreach (var property in model.GetType() .GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.SetProperty)) { if (IsEnumerableOfNssEntities(property.PropertyType)) { var listType = property.PropertyType.GetGenericArguments()[0]; var list = _repository.Query<listType>().ToList(); property.SetValue(model, list, null); } } }

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• Why does MySQL autoincrement increase on failed inserts?

  - by Sorcy

  A co-worker just made me aware of a very strange MySQL behavior. Assuming you have a table with an auto_increment field and another field that is set to unique (e.g. a username-field). When trying to insert a row with a username thats already in the table the insert fails, as expected. Yet the auto_increment value is increased as can be seen when you insert a valid new entry after several failed attempts. For example, when our last entry looks like this... ID: 10 Username: myname ...and we try five new entries with the same username value on our next insert we will have created a new row like so: ID: 16 Username: mynewname While this is not a big problem in itself it seems like a very silly attack vector to kill a table by flooding it with failed insert requests, as the MySQL Reference Manual states: "The behavior of the auto-increment mechanism is not defined if [...] the value becomes bigger than the maximum integer that can be stored in the specified integer type." Is this expected behavior?

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• In an ASP.NET MVC site, where would the JQuery code go?

  - by Maxim Z.

  I'm just getting started with ASP.NET MVC. I'm going to be using JQuery on the website I'm making, but I'm not really sure about one thing: where would JQuery code be placed? This concerns two things: Where do I import the JQuery JavaScript file? (I've been thinking that the Master page would be a good place to do this; am I right, or do I have to import it in each view?) Should all my JQuery code be referenced from the Master page (i.e., I store my code that uses JQuery in a separate .js file and reference it in a <script> tag)? Thanks in advance.

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• Why should I use a container div in HTML?

  - by lara.robertson

  I am currently learning html/css, and have noticed a common technique is to place a generic container div in the root of the body tag: <html> <head> ... </head> <body> <div id="container"> ... </div> </body> </html> Is there a valid reason for doing this? Why can't the css just reference the body tag?

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• Is it better to comment out unneeded code or delete it?

  - by Matt Connolly

  For web applications under maintenance, assuming you have source control, when you need to remove part of the UI and the associated code, do you delete the code and check in, or do you comment out the old code? Arguments in favor of deleting: cleaner code, can still see deleted code in source control history, no worrying about refactoring code that might be uncommented some day. Arguments in favor of commenting: sometimes you need to add the feature back in and the developer adding it back in may not know to check source control history, sometimes the code represents unique functionality that can be a handy reference, seeing it all in one place can help provide clues to deciphering the active code.

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• Why is floating point byte swapping different from integer byte swapping?

  - by CJ

  I have a binary file of doubles that I need to load using C++. However, my problem is that it was written in big-endian format but the fstream operator will then read the number wrong because my machine is little-endian. It seems like a simple problem to resolve for integers, but for doubles and floats the solutions I have found won't work. How can I (or should I) fix this? I read this as a reference for integer byte swapping: http://stackoverflow.com/questions/105252/how-do-i-convert-between-big-endian-and-little-endian-values-in-c

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• Form to sort an index in rails

  - by shmichael

  I'm a newcomer to Rails. I want to build a simple form that determines the sort order of a list. I've implemented a form in the likes of - <%= radio_button_tag :sort, "rating" %> <%= label_tag :sort_rating, "order by rating" %> <%= radio_button_tag :sort, "name" %> <%= label_tag :sort_name, "order by name" %> And now I am unsure how to implement the sort at the controller/model level. The aspects I am puzzled about are: Where should the sort be performed How could the sort parameter be persisted How could the code be reused Right now, I can't even get the selected sort method to remain selected after a submit. I would most appreciate any guidance or reference to an example.

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• C#: Problem trying to resolve a class when two namespaces are similar

  - by rally25rs

  I'm running into an issue where I can't make a reference to a class in a different namespace. I have 2 classes: namespace Foo { public class Class1 { ... } } namespace My.App.Foo { public class Class2 { public void SomeMethod() { var x = new Foo.Class1; // compile error! } } } The compile error is: The type or namespace name 'Class1' does not exist in the namespace 'My.App.Foo' In this situation, I can't seem to get Visual Studio to recognize that "Foo.Class1" refers to the first class. If I mouse-over "Foo", it shows that its trying to resolve that to "My.App.Foo.Class1" If I put the line: using Foo; at the top of the .cs file that contains Class2, then it also resolves that to "My.App.Foo". Is there some trick to referencing the right "Foo" namespace without just renaming the namespaces so they don't conflict? Both of these namespaces are in the same assembly.

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• Automatically copy new Jar file to Tomcat project WEB-INF/lib folder

  - by The D Williams

  I am developing a Tomcat app (actually it's a Red5 app, but this is effectively the same). This contains the usual /WebContent/WEB-INF/lib folder, which is where I locate the various jars it uses. Recently, I pulled a package out of my app project, and converted into a separate Jar project which was then released as open source (this resides in the same workspace). What I want, is that when I build my Tomcat app, that Eclipse automatically pulls the latest version of the Jar I have built into its /WebContent/WEB-INF/lib folder. This is the behaviour you get with .NET when you reference one project from another, and I guess this is why I was expecting to find some way of doing it. At the moment, I have to manually copy/paste the Jar across each time I build it. Of course, ideally when I build my Tomcat app it would automatically detect if the Jar project was up-to-date too, and build it if not. Any suggestions most gratefully received.

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• Why is generated XAML spitting out namespaces that are not asked for?

  - by Matt Holmes

  I have a very simple XAML form, that has one namespace definition. For some reason, when Visual Studio processes that XAML file in to it's component .g.cs, it's sticking a bunch of namespace definitions at the top that I have not asked for in the XAML, or the code behind, and they are namespaces that no longer exist in my project. Thus the project is failing to compile. Why is Visual Studio sticking arbitrary namespace 'using' statements in my generated XAML .g.cs files? It's caused my entire project to break. Not one time did this .xaml file ever reference the namespaces in question, so it's doubly annoying.

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• How can match end-of-line multiple times in a regex without interpolation?

  - by harschware

  Hi, if I have a input with new lines in it like: [INFO] xyz [INFO] How can I pull out the xyz part? I tried a pattern like /^\[INFO\]$(.*?)$\[INFO\]/ms, but perl gives me: Use of uninitialized value $\ in regexp compilation at scripts\t.pl line 6. I've been trying things to get interpolation to stop like using qr// but alas, no love. EDIT: The key is that the end-of-line anchor is a dollar sign but at times it may be necessary to intersperse the end-of-line anchor through the pattern. If the pattern is interpolating then you might get problems such as uninitialized $\. For instance an acceptable solution here is /^\[INFO\]\s*^(.*?)\s*^\[INFO\]/ms but that does not solve the crux of the first problem. I've changed the anchors to be ^ so there is no interpolation going on, and with this input I'm free to do that. But what about when I really do want to reference EOL with $ in my pattern? How do I get the regex to compile?

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• WPF - copy/paste selection with custom font family

  - by summergoat

  I have a custom font family embedded in my WPF application which I can reference by specifying a base URI and font family name. new FontFamily(new Uri("pack://application:,,,/Fonts/"), "./#My Custom Font Family"); However, when I copy a selection which uses this font the xaml on the clipboard resembles the following <Run Text="Foo" FontFamily="./#My Custom Font Family" /> When I paste into the same RichTextBox I lose the font as it falls back to the system default because - When a FontFamily is specified as an attribute in markup, the base URI value is always implied—its value is the URI of the XAML page. http://msdn.microsoft.com/en-us/library/system.windows.media.fontfamily.aspx and my xaml page is not located in the same directory as the custom font family. Any ideas for a workaround?

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• Comparing two java objects on fly (data type not known)

  - by Narendra

  Hi All, I need to compare different data objects. Can any one tell me how can i do this. I don't know what are the data types i will get priorly. If i need to use any util from apache commons then please give reference to it. At present I am using .equals() for comparing equality of objects .It is working fine when I am comparing quality for two strings. If i am comparing java.sql.date data type then it is showing unequal even though both contains same values. Can any one suggest me on this regard. Thanks, Narendra

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• mysql data type confusion

  - by zen

  So this is more of a generalized question about MySQLs data types. I'd like to store a 5-digit US zip code (zip_code) properly in this example. A county has 10 different cities and 5 different zip codes. city | zip code -------+---------- city 0 | 33333 city 1 | 11111 city 2 | 22222 city 3 | 33333 city 4 | 44444 city 5 | 55555 city 6 | 33333 city 7 | 33333 city 8 | 44444 city 9 | 22222 I would typically structure a table like this as varchar(50), int(5) and not think twice about it. (1) If we wanted to ensure that this table had only one of 5 different zip codes we should use the enum data type, right? Now think of a similar scenario on a much larger scale. In a state, there are five-hundred cities with 418 different zip codes. (2) Should I store 418 zip codes as an enum data type OR as an int and create another table to reference?

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