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• Consuming "Event Tracing for Windows" events

  - by Paul Baker

  An answer to this question has led me to look into using "Event Tracing for Windows" for our tracing needs. I have come across NTrace, which seems to be a good way to produce ETW events from C# code (using the XP-compatible "classic provider" model). However, I am unable to find an easy way to consume these events - to see them in real-time and/or log them to a file. The only way I have found is that described in the NTrace documentation: using a tool which is only available as part of the Windows DDK. In the case of a complex problem in the field, we may need to ask the user to produce a file containing a trace. We can't ask users to download the DDK or carry out a number of complex operations in order to do this. Is there a straightforward, user-friendly way to log ETW events to a file? Also, is it possible for someone to consume ETW events on Windows Vista/7 if they are not running as administrator?

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• Was Joel right about XML being slow?

  - by Will

  A long time ago Joel explained how various every-day coding things were slow, and this led to XML as a data store being slow: http://www.joelonsoftware.com/articles/fog0000000319.html Are those every-day coding things - strcat and malloc - still slow in a std::string and dlmalloc world? What else has changed in modern processors and mainstream frameworks? And is XML still slow? You can't find an RDBMS that doesn't claim some kind of native XML support these days; haven't they got it faster - a single pass to index it for example - yet?

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• Jpeg calculating max size

  - by Doodle

  I have to say the I don't know much about how file formats work. My question is say I have a jpeg file that is 200 px by 200 px, how can one calculate what the maximum size that file could be in terms of megabytes/bytes? I think that the reasoning that led to the question will help some one answer me. I have a Java Applet the uploads Images that people draw with it to my server. I need to know what the max size that this file can conceivably reach. It is always going to be 200x200. It sounds dumb but are there colors that take more byte size then others and if so what is the most expensive one?

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• Flex HDividedBox Divider backgroundColor

  - by Jeremy Mitchell

  Is there an easy way to set the backgroundColor of a HDividedBox's (or VDividedBox's) BoxDivider object(s)? A BoxDivider is the "divider" that has the drag handle on it. By default, the BoxDivider is transparent with the little handle image on it. There is a dividerSkin style that defaults to mx.skin.BoxDividerSkin which is a reference to a symbol in the Assets.swf file. Any ideas? Do I have to make an alternate skin? Is that my only option? Googling this led me to many solutions that were weird and hacky and frankly didn't seem to work. Thanks.

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• Validate a single property with the Fluent Validation Library for .Net

  - by Blegger

  Can you validate just a single property with the Fluent Validation Library, and if so how? I thought this discussion thread from January of 2009 showed me how to do it via the following syntax: validator.Validate(new Person(), x => x.Surname); Unfortunately it doesn't appear this works in the current version of the library. One other thing that led me to believe that validating a single property might be possible is the following quote from Jeremy Skinners' blog post: "Finally, I added the ability to be able to execute some of FluentValidation’s Property Validators without needing to validate the entire object. This means it is now possible to stop the default “A value was required” message from being added to ModelState. " However I do not know if that necessarily means it supports just validating a single property or the fact that you can tell the validation library to stop validating after the first validation error.

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• Convert latitude and longitude into northings and eastings

  - by Rippo

  Hi I have the following UK postcode dy8 3xt and know that the latitude and longitude is:- 54.452772 -2.156082 I also know that the Eastings, Northings for the postcode is:- 389490 283880 However I am struggling to find the equation that converts lat/long to northings and Eastings, I would prefer to have the equation in both in jScript and c# (I am being greedy)! Can anyone help? EDIT Thanks for your help so far guys, I am starting to learn something here esp. the terminology... Some more info, if you click on this link you can see the results I am looking for. The postcode I entered projects to lat/lng using WG S84 and the grid ref projects to OSGB. So my question is how is this done? WHAT I LEARNT Thanks to all that answered, I finally got led to here which I can confirm works great

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• reference suggestion in latex windows (multi-file structure)

  - by voodoomsr

  There is some editor of latex that managed the labels for a multifile document?. I tried with TexMaker and LED, and they offers me suggestions about the labels present in the actual document and in the "Master" document but not the labels present in other files of the structure. I made a script to find those other labels but it will be real good that the suggestions covers all the file structure automatically. Finally i tried with Vim and Latex-Suite, this extension has that posibility but i have problem configuring the grep program despite having followed all the instructions found in their website and in the help files, :(. the structure is like this: document.tex mystyle.sty mybibliography.bib tex/file1.tex tex/file2.tex tex/... img/img1.png img/img2.png . . .

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• No colors when using autospec

  - by kfitzpatrick

  When I'm using autospec to test a non-Rails Ruby project, I always have trouble getting my tests to show up red or green. When I run a regular 'spec spec/ --color' command I get normal red/green responses. I've tried putting all sorts of commands in the .autotest file and I can't get that to work. Also, in my Rails projects, I don't get this problem. Note: I do have the ZenTest(4.2.1) and redgreen (1.2.2) gems installed. I'm currently trying to get it working with this project: http://github.com/coreyhaines/kata-number-to-led

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• CF Framework Targeting.

  - by En

  Hi if a smart device project is set to target CF 2.0, Windoes CE 5.0. Should this same application run on Windows Mobile 6 with CF 3.5 installed? I was able to install it (the CF 2 app), but when running receive an error stating that the assemblies could not be loaded and that CF might not be installed. This has led me to belive that smart device projects wil ONLY work on the framework they target, not any versions lower or greater. Any help would be greatly appreciated.

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• ASP.net MVC [HandleError] not catching exceptions.

  - by Eric

  In two different application, one a custom the other the sample MVC application you get with a new VS2008 MVC project, [HandleError] is not catching exceptions. In the sample application I have: [HandleError] public class HomeController : Controller { public ActionResult Index() { ViewData["Message"] = "Welcome to ASP.NET MVC!"; throw new Exception(); return View(); } public ActionResult About() { return View(); } } which is just the default controller with an exception being thrown for testing. But it doesn't work. Instead of going to the default error.aspx page it shows the debug information in the browser. The problem first cropped up in a custom application I'm working on which led me to test it with the sample application. Thinking it had something to do with changes I made in the custom application, I left the sample application completely unchanged with the exception (yuck) of the throw in the index method. I'm stumped. What am I missing?

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• Upload/Download images to FTP without bothering the user

  - by Dan B

  Hi, I know a lot of posts have been made in regards to FTP, but none have led me to what I need. I'm trying to upload a picture to a server (currently attempting FTP) but do it without notifying requiring the user to be involved. I want to be able to seamlessly upload/download the image when a certain user action occurs, but I don't want to use a third-party app like AndFTP. The idea is that a user will upload a picture, and then another user will be able to grab that picture based on which user put it up. No user will know where it's going or where it came from, nor will they navigate the FTP. Alternatively, does anyone have thoughts on a better way to do that? I thought of using the imgur api, but it can't be used commercially. It would, however, be perfect for my purposes. Is there a similar open-source alternative? Any help is greatly appreciated. Dan

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• How to add request validation errors to ModelStateDictionary in ASP.NET MVC?

  - by Morten Christiansen

  Investigating the security of a system I'm building with ASP.NET MVC 2 led me to discover the request validation feature of ASP.NET - a very neat feature, indeed. But obviously I don't just want to present the users with the Yellow Screen of Death when they enter data with HTML in, so I'm out to find a better solution. My idea is to find all the fields that have invalid data and add them to the ModelStateDictionary before invoking the action such that they automatically appear in the UI as error messages. After googling this a bit it appears that no one have implemented this before which I find puzzling since it seems so obvious. Does anyone here have a suggestion on how to do this? My own idea is to supply a custom ControllerActionInvoker to the controller, as described here, that somehow checks for this and modifies the ModelStateDictionary but I'm stuck on how to do this last bit. Just catching HttpRequestValidationException exceptions does not seem a useful approach since it does not actually contain all the information I need.

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• Joomla 1.5 Media Manager sets incorrect file permissions when uploading

  - by Scott Mayfield

  Howdy all, I have a Joomla 1.5 installation running on Windows Server 2008, installed via the Web Platform Installer. When uploading images with the media manager (native uploader, not the flash bulk uploader), the files arrive on the server correctly, but are given incorrect permissions. Specifically, the IIS_IUSRS group is not given access to the file. I might be incorrect about what group/user is SUPPOSED to get access to the files, but so far, I've found that unless I give IIS_IUSRS access to the uploaded files, they won't appear on the site or in the media manager (appear as broken images). Once I give IIS_IUSRS permission to the files, they work fine. So far, all the research I've done has led me to linux specific fixes that involve either changing the umask on the server, or directly modifying the Joomla codebase to add an appropriate chmod command to the upload process, but I really don't want to modify Joomla directly. I have to believe there's a setting here somewhere that will do the job, either on the Joomla or Windows side of the equation. Any thoughts? Scott

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• CommandManager Executed Events don't fire for custom ICommands

  - by Andre Luus

  The WPF CommandManager allows you to do the following (pseudo-ish-code): <Button Name="SomeButton" Command="{Binding Path=ViewModelCommand}"/> And in the code-behind: private void InitCommandEvents() { CommandManager.AddExecutedEventHandler(this.SomeButton, SomeEventHandler); } The SomeEventHandler never gets called. To me this didn't seem like something very wrong to try and do, but if you consider what happens inside CommandManager.AddExecutedEventHandler, it makes sense why it doesn't. Add to that the fact that the documentation clearly states that the CommandManager only works with RoutedCommands. Nonetheless, this had me very frustrated for a while and led me to this question: What would you suggest is the best workaround for the fact that the CommandManager does not support custom ICommands? Especially if you want to add behavior around the execution of a command? For now, I fire the command manually in code behind from the button click event.

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• python duration of a file object in an argument list

  - by msw

  In the pickle module documentation there is a snippet of example code: reader = pickle.load(open('save.p', 'rb')) which upon first read looked like it would allocate a system file descriptor, read its contents and then "leak" the open descriptor for there isn't any handle accessible to call close() upon. This got me wondering if there was any hidden magic that takes care of this case. Diving into the source, I found in Modules/_fileio.c that file descriptors are closed by the fileio_dealloc() destructor which led to the real question. What is the duration of the file object returned by the example code above? After that statement executes does the object indeed become unreferenced and therefore will the fd be subject to a real close(2) call at some future garbage collection sweep? If so, is the example line good practice, or should one not count on the fd being released thus risking kernel per-process descriptor table exhaustion?

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• How can I install ruby on rails with rvm?

  - by yeahthatguyrightthere

  I've been searching around on how to install it through the terminal on my mac. I'm using snow leopard. When I use the command: rvm install 1.9.3 I've also followed the other procedures that led me up to this to install, right now the current version is 1.8.3 Error running './configure --prefix="/Users/jose/.rvm/usr" ', please read /Users/jose/.rvm/log/ruby-1.9.3-p125/yaml/configure.log Then it mentions something about xcode and autoreconf was not found in the PATH. Error running 'patch -F 25 -p1 -N -f <"/Users/jose/.rvm/patches/ruby/1.9.3/p125/xcode-debugopt-fix-e34840.diff"',please read /Users/jose/.rvm/log/ruby-1.9.3-p125/patch.apply.xcode-debugopt-fix-r34840.log rvm requires autoreconf to install the selected ruby interpreter however autoreconf was not found in the PATH I been trying for awhile now, and found out i need to have Xcode for snow leopard which I cannot find. So my last option will be to upgrade to lion but I don't know about upgrading. Kind of scared to upgrade and everything becomes buggy.

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• Subversion Repository Layout

  - by Tim Long

  Most subversion tools create a default repository layout with /trunk, /branches and /tags. The documentation also recommends not using separate repositories for each project, so that code can be more easily shared. Following that advice has led to me having a repository with the following layout: /trunk /Project1 /Project2 /branches /Project1 /Project2 /tags /Project1 /Project2 and so on, you get the idea. Over time, I've found this structure a bit clumsy and it occurred to me that there's an alternative interpretation of the recommendations, such as: /Project1 /trunk /branches /tags /Project2 /trunk /branches /tags So, which layout do people use, and why? Or - is there another way to do things that I've completely missed?

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• Is there a declarative language for data definitions?

  - by Jekke

  Reading about WPF and thinking about my application's data store at the same time led me to wonder if there are any languages or tools that allow you to define relational data in a declarative way? A shallow Google search suggests no such thing exists. Yet it seems so obviously useful. The kind of tool I have in mind would declaratively describe (at least) entities, relationships and views is a platform-agnostic way that would act as an abstraction layer between data-driven applications and their datastores. Does any such tool exist?

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• Using a single visual studio 2005 solution with multiple source control applications

  - by Bas Bossink

  In my recent SO question I was helped tremendously in using git as a front-end to ClearCase. However actually trying the suggested answer(s) led to further complications. Visual Studio keeps a reference to the used source control provider in both the .sln as well as the .csproj files. I tried resolving this issue by keeping a modified copy of the .sln with the source control provider paragraph removed but this did not help since each project also has some source control provider information. I don't want to keep private copies of all the projects since this would be a maintenance nightmare. Do any of you have suggestions on how to resolve this issue?

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• What are the things I use every day programmed with?

  - by sub

  It isn't so interesting to find out what this text editor here or that IRC client there was programmed with, also it isn't really hard and neither are there really suprising things to come out. Wow so it was programmed in Python, I didn't expect that. What I'm asking is: What are the things that we daily see, use or generally need programmed with? To name a few (really only a few of those out there): My alarm clock It has many features so it would probably be hard programming it with assembler or whatever, so did they probably use a programming language? If yes, which? My electrical tooth brush The (stupid) board computer of my car. (6 years old, has few features but a red LED display showing me how cold/warm it is outside and how much gas I'm using up per hour at the moment) Those (old) plastic mini-mini computers with the LCD(?) displays that only had one game available on them: PacMan, tetris or so. I'm not directly thinking of this but it may be similar: Other, probably more interesting, things I didn't mention

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• Code reading: where can i read great, modern, and well-documented C++ code?

  - by baol

  Reading code is one of the best ways to learn new idioms, tricks, and techniques. Sadly it's very common to find badly written C++ code. Some use C++ as it was C, others as if it was Java, some just shoot in their feet. I believe gtkmm is a good example of C++ design, but a binding could not be the better code to read (you need to know the C library behind that). Boost libraries (at least the one I read) tend to be less readable than I'd like. Can you mention open source projects (or other projects which source is freely readable) that are good example of readable, modern, well-documented, and auto-contained, C++ code to learn from? (I believe that one project per answer will be better, and I'd include the motivation that led you to selecting that one.)

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• Why does Excel expose an 'Evaluate' method at all?

  - by jtolle

  A few questions have come up recently involving the Application.Evaluate method callable from Excel VBA. The old XLM macro language also exposes an EVALUATE() function. Both can be quite useful. Does anyone know why the general expression evaluator is exposed, though? My own hunch is that Excel needed to give people a way to get ranges from string addresses, and to get the value of named formulas, and just opening a portal to the expression evaluator was the easiest way. But of course you don't need the ability to evaluate arbitrary expressions just to do that. Application.Evaluate seems kind of...unfinished. It isn't very well documented, and there are quite a few quirks and limitations (as described by Charles Williams here: http://www.decisionmodels.com/calcsecretsh.htm) with what is exposed. I suppose the answer could be simply "why not expose it?", but I'd be interested to know what design decisions led to this feature. Failing that, I'd be interested to hear other hunches.

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• WordPress > Activating plugin makes site go blank in one theme, not in another. Generated source ide

  - by Scott B

  Strangest thing. When I activate this specific plugin, the public side of the site goes blank (nothing but a white screen with blank view source). However, when I test the site with the wordpress default theme, the plugin does not conflict and the site works fine. The interesting thing is that I've compared the generated source (using FF's webmaster tools) with and without plugin activated and in each case they are identical. This led me to believe that perhaps the plugin was altering htaccess, however, that file is the same whether or not the plugin is active or not. How can I find out what is causing the problem with this plugin? The plugin is called "Crawl Rate Tracker".

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• Extremely basic PHP and Mysql

  - by fighella

  Background: I am more of a designer than a programmer, but have hacked templates for many open source CMS's (Drupal, Joomla, Wordpress) I want to start from scratch in regards to the relations of php and a mysql database. Lets assume I have a working database and php engine locally. What would be my first step to connecting to my database and creating a table... (im happy to be led to an appropriate tutorial...) Many of the tutorials I have seen start with basic php, but I would rather explore the connection between the db and the php.

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• Only variables can be passed by reference

  - by zaf

  I had the bright idea of using a custom error handler which led me down a rabbit hole. Following code gives (with and without custom error handler): Fatal error: Only variables can be passed by reference function foo(){ $b=array_pop(array("a","b","c")); return $b; } print_r(foo()); Following code gives (only with a custom error handler): (2048) Only variables should be passed by reference function foo(){ $a=explode( '/' , 'a/b/c'); $c=array_pop(array_slice($a,-2,1)); return $c; } print_r(foo()); The second one worries me since I have a lot of 'compact' code. So, I either ditch the bright idea of using a custom error handler (to improve my logging module) or expand all my code. Anyone with better ideas? Also, WTF?

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