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• Comparison of collection datatypes in C#

  - by Joel in Gö

  Does anyone know of a good overview of the different C# collection types? I am looking for something showing which basic operations such as Add, Remove, RemoveLast etc. are supported, and giving the relative performance. It would be particularly interesting for the various generic classes - and even better if it showed eg. if there is a difference in performance between a List<T> where T is a class and one where T is a struct. A start would be a nice cheat-sheet for the abstract data structures, comparing Linked Lists, Hash Tables etc. etc. Thanks!

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• How can I use a single UIToolbar with multiple different UIViewControllers?

  - by Aeonaut

  I have a simple app with two basic screens, a UIMapView and a UITableView. I'd like to have a toolbar at the bottom with a couple of buttons and a UISegmentedControl with two segments: "Map" and "Table". (The layout is similar to the Google Maps app that ships with the iPhone.) How can I keep the same toolbar while presenting either the UIMapView (with a UIMapViewController) or the UITableView (with a UITableViewController) when the user switches back and forth on the segmented control? Of course, I can just create an identical toolbar for each of the two different views and display them separately, but is there a better way?

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• Will WF 4.0 make me Obsolete

  - by codemnky

  I saw a post on Oslo about making us obsolete. I just happened to listen to the latest Deep Fried Episode with Brian Noyes. They were talking about SharePoint and Windows Workflow and how the "dream" of Windows Workflow is to let mere Business Analyst Drag and Drop their way to a functioning service. I am a newbie dotnet developer, and afraid that by the time I get to Consulting "Level" my skills would be obsolete. Should I abandon learning basic skills and just learn how to work with Frameworks and Packaged applications such as SAP, SharePoint, BizTalk. Am I wasting time trying to learn Expression Trees and Func of T's?

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• Jquery help for current time indication within a range

  - by Appster

  I'm looking for a simple light-weight jquery plugin that'll help me show something like this in my website: Essentially, this is like a timeline. I know the start and end dates (in that, they don't change) and the position of today's date just gives an indication of how far along I am into a task I took up on Jun 1, 2012. That's all I need it for - a better visual indication of my current status. I've found a lot of jquery timeline plugins but they are too complex for what I'm trying to do. Any ideas or suggestions? Thanks in advance.

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• Chaining jQuery animations using recursion crashes browser

  - by Rob Sobers

  Here's the basic idea of what I'm trying to do: Set the innerHTML of a DIV to some value X Animate the DIV When the animation finishes, change the value of X and repeat N times If I do this in a loop, what ends up happening is, because the animations occur asynchronously, the loop finishes and the DIV is set to its final value before the animations have had a chance to run for each value of X. As this question notes, the best way to solve this problem is to make a recursive call to the function in the callback handler for the animation. This way the value of the DIV doesn't change until the animation of the previous value is complete. This works perfectly...to a point. If I animate a bunch of these DIVs at the same time, my browser gets overwhelmed and crashes. Too much recursion. Can anyone think of a way to do this without using recursion?

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• correct way to store an exception in a variable

  - by Evan Teran

  I have an API which internally has some exceptions for error reporting. The basic structure is that it has a root exception object which inherits from std::exception, then it will throw some subclass of that. Since catching an exception thrown in one library and catching it in another can lead to undefined behavior (at least Qt complains about it and disallows it in many contexts). I would like to wrap the library calls in functions which will return a status code, and if an exception occurred, a copy of the exception object. What is the best way to store an exception (with it's polymorphic behavior) for later use? I believe that the c++0x futures API makes use of something like this. So what is the best approach? The best I can think of is to have a clone() method in each exception class which will return a pointer to an exception of the same type. But that's not very generic and doesn't deal with standard exceptions at all. Any thoughts?

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• Why won't the debugger update?

  - by Tanner

  Hello everyone, Ive had this problem multiple times and it ruins my projects, I make some changes, like say I have a button in the top left corner of the form and move it to the top right corner, then I press debug but nothing happens to the form, it doesn't change the button is still in the top left-hand corner instead of the top right, and it also doesn't except any new code, its like it saved the project right there and won't move on. Does any one know why or had this problem before? Please, Help!!!! Additional Details: Compiler: Microsoft Visual C# 2008 Express Edition I once fixed this problem by rebuilding the solution, but its never worked again.

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• How do you access byte level information in JavaScript?

  - by JustSmith

  The generally accepted answer is that you can't. However there is mounting evidence that this is not true based on the existence of projects that read in types of data that are not basic HTML types. Some projects that do this are the JavaScript version of ProtoBuf and Smokescreen. Smokescreen is a flash interpreter written in JS so if it is not possible to get at the bytes directly how are these projects working around this? The source to Smokescreen can be found here. I have looked it over but with JS not being my primary language right now the solution eludes me.

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• Can run Javascript but not jQuery?

  - by blazonix

  I'm running into a strange problem - I tried running a basic function in JS and jQuery, and while the former worked, the latter didn't. JS - okay alert('Works'); jQuery - not okay $(document).ready({ alert('Works'); }); Here's some facts: My references to the jQuery library are correct (And pretty sure my Internet connection is steady :) I'm using a CDN - CloudFlare to be exact, but I've switched development mode on and Rocket Loader off - so all the code I've uploaded to the server is WYSIWYG (CloudFlare adds some stuff in the tags if you leave Rocket Loader on. I tried running the alert code in the head section, and elsewhere in the body tags, to no avail. What could have possibly gone wrong? EDIT 1: The page is here - http://casestudieslounge.com/chat/BIM/WebContent/chat.php

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• Deploying .NET components (upgrade the component for only a single client application)

  - by Vytas999

  I use Visual Studio .NET to create a component that will be shared by two client applications. Eventually, I plan to deploy new version of this component. However, not all of the new versions will be compatible with both client applications. When I deploy component and the client applications, I must ensure that I can upgrade the component for a single client application. I must also minimize the need for configuration changes when I deploy new version of the component. What are possible ways to achieve this goal?

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• Beginners PHP e-mail problem

  - by Reg H

  I'm working on my first PHP project, and it's going well. I've been able to figure out how to do most of what I need so far, but there's one big problem for me now: E-mail. I'm on a shared server, so I can't install PEAR, and I can't modify my php.ini. According to my host's very limited documentation, I have to use SMTP so I can't (correct me if I'm wrong) use the mail() function. So does anyone have any suggestions on what to do? At this point I just want to send a basic text message, so where would I specify my SMTP port number, user, password and so on? Thanks

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• javax.servlet import cannot be resolved after moving web servlet

  - by Michael Kjörling

  I have written a small web servlet to run under Tomcat, using Eclipse Helios. In its old, non-source-controlled location, everything was fine, but now I need to add this to our source control system. Moving the old files out of the way, creating a new workspace, setting up the server connection and copying and importing the existing projects into the new workspace all worked fine once I figured out how to do it, but I can't get the servlet to build. Instead, I get a whole bunch of cannot be resolved to a type errors talking about various servlet class types; HttpServlet, HttpServletRequest, ServletException, etc. Another error that is almost certainly related is The import javax.servlet cannot be resolved. I am obviously missing something very basic, but I'm new to this (and not having the terminology really down pat probably doesn't help me Google for an answer). Any suggestions as to what I might be missing would be greatly appreciated.

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• problem adding a where clause to a T-sql LEFT OUTER JOIN query

  - by Nickson

  SELECT TOP (100) PERCENT dbo.EmployeeInfo.id, MIN(dbo.EmployeeInfo.EmpNo) AS EmpNo, SUM(dbo.LeaveApplications.DaysAuthorised) AS DaysTaken FROM dbo.EmployeeInfo LEFT OUTER JOIN dbo.LeaveApplications ON dbo.EmployeeInfo.id = dbo.LeaveApplications.EmployeeID WHERE (YEAR(dbo.LeaveApplications.ApplicationDate) = YEAR(GETDATE())) GROUP BY dbo.EmployeeInfo.id, dbo.EmployeeMaster.EmpNo ORDER BY DaysTaken DESC The basic functionality i want is to retrieve all records in table dbo.EmployeeInfo irrespective of whether a corresponding record exists in table dbo.LeaveApplications. If a row in EmployeeInfo has no related row in LeaveApplications, i want to return its SUM(dbo.LeaveApplications.DaysAuthorised) AS DaysTaken column as NULL or may be even put a 0. With the above query, if i remove the where condition, am able to achieve what i want, but problem is i also want to return related rows from LeaveApplication only if ApplicationDate is in the current year. Now with the where condition added, am only able to get rows from EmployeeInfo only if they have corresponding rows in LeaveApplications yet i just wanted rows all in EmployeeInfo

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• Multiple Input From Keyboard C# WPF

  - by Alex

  I am writing a Tetris clone in WPF. If I hold down the right arrow key, the current piece shifts right. For playability, I want to allow the user to press another key (i.e. F-key) and rotate the moving piece without having to let go of the right arrow key first. Currently when I do this, the piece stops shifting. My first basic attempt at this was hooking into Window_PreviewKeyDown(object sender, KeyEventArgs e) and then sending a message to the controller layer. How do I structure my input-listening code to allow this? My current code Here

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• How can I set the Root Namespace property correctly in a C++/CLI application?

  - by Matthew Bowen

  I have a C++/CLI application in Visual Studio 2008 whose namespace follows the .NET guideline of CompanyName.TechnologyName[.Feature][.Design]. The problem is that there seems to be no way to set a multi-level namespace in the project's Root Namespace property. I have tried both CompanyName.TechnologyName and CompanyName::TechnologyName. It seems that I cannot have a Form control inside a namespace that is not the root namespace as this causes the resources it uses to not be found, thus to me it seems impossible to follow their guideline and be consistent with my C# applications. Is there a way to set this property to use multi-leveled namespaces or am I forced to use a root namespace that is simply one-level? Or is there a solution that I am overlooking? Any help would be appreciated. Thanks

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• Return parent of node in Binary Tree

  - by user188995

  I'm writing a code to return the parent of any node, but I'm getting stuck. I don't want to use any predefined ADTs. //Assume that nodes are represented by numbers from 1...n where 1=root and even //nos.=left child and odd nos=right child. public int parent(Node node){ if (node % 2 == 0){ if (root.left==node) return root; else return parent(root.left); } //same case for right } But this program is not working and giving wrong results. My basic algorithm is that the program starts from the root checks if it is on left or on the right. If it's the child or if the node that was queried else, recurses it with the child.

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• Java Swing app hangs when run in normal mode but runs fine in debug mode

  - by snocorp

  I am writing a basic Java application with a Swing front-end. Basically it loads some data from a Derby database via Apache Cayenne and then displays it in a JTable. I'm doing my development in Eclipse and I don't think it's important but I'm using Maven for dependencies. Now this works fine when I run using Debug but it seems to hang the display thread when I use the Run button. I've done a thread dump and I'm not 100% certain but everything looks good. I used Java VisualVM and the threads look fine there as well. Strangely it seems to work intermittently. It's pretty consistent though and easy to reproduce. If anyone has any ideas, I'm all out of them.

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• Lines-of-code counting for many C# solutions

  - by Eric

  I am currently researching a solution for counting lines of code in C#. I pretty much need a combination of the following two tools: http://richnewman.wordpress.com/2007/07/01/c-and-vbnet-line-count-utility/ http://www.locmetrics.com/index.html My problem is that I need to recursively scan a folder containing a lot of visual studio solutions. So can't really use the first tool without any major work on its code, as it's only able to scan a single solution at a time. But I also need to split the results for each solution, preferably even the contained projects. This disqualifies the second tool I found. I also found NDepend which suffers from the same problem. Do you know of any free tools that do what I need? I am unable to find anything suitable.

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• SendMessage (F4) fails when sending it to window

  - by Olli

  Working with Visual Studio 6 (VC++ 6.0) I'm using an ActiveX datepicker control which I fail to show expanded by default (3006216). Alternatively I'm trying to send a keyboard message (F4) to my window to open up the control, but nothing happens when I do so... // try 1: use the standard window handle LRESULT result = ::SendMessage(m_hWnd,VK_F4, 0, 0); // try 2: use just use the SendMessage result = SendMessage(VK_F4); result is always 0 - what can I do to test/verify the message sending? Thanks in acvance a lot... Olli

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• PHP Escaping from HTML, faster, cleanner?!

  - by rno

  I've read about it from the php website (http://us3.php.net/manual/en/language.basic-syntax.phpmode.php) Using: echo "<html tag>" is slower and also annoying because you got to escape char like " with \" But what's about using $output = <<< EOF <html code> EOF; Then later on in the code I can use $output .= <<< EOF <some more html code> EOF; then when I want to print it: echo "$output"; I think it's a great idea, but really wonder what you PHP guru think about it. Cheers, rno

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• Is it practical to learn and use Forth?

  - by Workshop Alex

  When I was still a young developer, I started to focus on the many available programming languages. But in 1980 to 1990 there weren't many freely available compilers. So I started with several BASIC dialects for home computers, Pascal and C on my PC, I did an exam in COBOL and dabbled a bit in Assembly and a few other languages. And at one point I took a short look at Forth. That's over 20 years ago and I've learned a lot ever since. I know that Forth is still used these days. It's still a good programming language but since I focus mostly on Windows development, I just wonder if knowing Forth could be helpful for future projects of mine. So, would it be practical for an experienced developer to learn more about Forth?

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• Simply display RSS feed in/on aspx page

  - by Louis van Tonder

  Maybe I am being a n00b here, but for the life of me, I cant find a simple drop in type solution for displaying an rss feed inside an aspx page? I am looking for a simple solution, as when Firefox gets pointed to an rss feed, it just plainly displays it, no thrills, no fuss. I don't want to get into the xml and format it extensively. I just want a basic feed, will style it with font and a:styles. Thats it. Any ideas? EDIT: I am attempting to show a worpress "feed" inside an aspx page...

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• Reading int from a hidden field in .aspx

  - by vikp

  Hi, I'm struggling to read an int from the hidden field on aspx page. <input type = "hidden" id = "myIntegerId" name = "integerId" value= "<%: Model.MyObjectId %>" runat = "server" /> The value is definately on the form, I can see it in the debugger and print it with <%: % When I read the form values in the controller, instead of an int I recieve a following string: <%: Model.MyObjectId % I have tried casting data in the hidden field to string and calling ToString() method on that field, neither has worked. The data is submitted using the post event. I have a feeling that I'm missing something very basic... Any help is greately appreciated. Thanks

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• Why are framework dlls repeated in several places?

  - by Xose Lluis

  After installing .Net 4 and getting some questions that were already answered here I also realized how the Framework dlls are repeated in several places for the different Framework versions (this is not new, it happens with previous versions, but hadn't paid attention to it until now) 1 - GAC: %systemroot%\assembly 2- Framework installation directory: %systemroot%\Microsoft.NET\Framework\v... 3- and if you have the Windows SDK installed, also in: C:\Program Files\Microsoft SDKs\Windows\ I think the last ones are the so called "Reference Assemblies" and have extra metadata to aid Visual Studio, but what about location number 2? Why are assemblies repeated there?

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• How do you create your own drag-n-drop GUI designer ?

  - by panzerschreck

  Hello I was looking at creating a UI for developing web forms, similar to the Netbeans Visual JSF form designer.It will be targeted to use GWT/GXT components.I am looking at a look very similar to VS/Netbeans. Any thoughts on where/how to start ? Initially, I would prefer to have it as a standalone application, later develop it as eclipse plugin. I have already evaluated the extjs designer and the eclipse plugin from instantiations, but i would prefer to have it developed on my own, as it looks challenging, Also, I have few custom components that have been developed. Thanks

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