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  • Question with R. Element wise multiplication, addition, and division with 2 data.frames with varying

    - by Michael
    I have a various data.frames with columns of the same length where I am trying to multiple 2 rows together element-wise and then sum this up. For example, below are two vectors I would like to perform this operation with. > a.1[186,] q01_a q01_b q01_c q01_d q01_e q01_f q01_g q01_h q01_i q01_j q01_k q01_l q01_m 3 3 3 3 2 2 2 3 1 NA NA 2 2 and > u.1[186,] q04_avl_a q04_avl_b q04_avl_c q04_avl_d q04_avl_e q04_avl_f q04_avl_g q04_avl_h q04_avl_i q04_avl_j q04_avl_k q04_avl_l q04_avl_m 4 2 3 4 3 4 4 4 3 4 3 3 3` The issue is that various rows have varying numbers of NA's. What I would like to do is skip the multiplication with any missing values ( the 10th and 11th position from my above example), and then after the addition divide by the number of elements that were multiplied (11 from the above example). Most rows are complete and would just be multiplied by 13. Thank you!

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  • Generating new sources via Maven plugin after compile phase

    - by japher
    I have a Maven project within which I need execute two code generation steps. One generates some Java types, then the second depends on those Java types to generate some more code. Is there a way to have both of these steps happening during my build? At the moment my steps are: execute first code generation plugin (during generate-sources) add directory of generated types to build path execute second code generation plugin (during compile) However my problem is that anything generated by the second code generation plugin will not be compiled (because the compile phase has finished). If I attach the second code generation plugin to an earlier phase, it fails because it needs the classes from the first code generation plugin to be present on the classpath. I know I could split this into two modules with one dependent on the other, but I was wondering if this could be achieved in one pom. It seems like a need a way to invoke compile again after the normal compile phase is complete. Any ideas?

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  • What parts of .NET require administrative priviliges to be executed?

    - by Ruben Steins
    Which parts of the framework require a user to be more than a Standard User? The reason I'm asking is because I'm trying to compile a list of possible issues with our existing applications when migrating to Windows 7. Now, I can think of a few things myself: Writing to Eventlog Writing to Registry Keys outside of Current_User scope Getting an Environment variable etc... I really would like a more complete list and so far I've not come across a decent resource in which all this stuff is listed. Note that I'm not looking for ways of elevating the priviliges for the exsiting apps (which can be done by using a manifes), I'm simply idenitifying actions in code that might cause issues.

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  • SQlite: Column format for unix timestamp; Integer types

    - by SF.
    Original problem: What is the right column format for a unix timestamp? The net is full of confusion: some posts claim SQLite has no unsigned types - either whatsoever, or with exception of the 64bit int type (but there are (counter-)examples that invoke UNSIGNED INTEGER). The data types page mentions it only in a bigint example. It also claims there is a 6-byte integer but doesn't give a name for it. Of course standard INTEGER being 4-byte signed signed stores unix timestamps as negative numbers. I've heard that some systems return 64-bit timestamps too. OTOH I'm not too fond of wasting 4 bytes to store 1 extra bit (top bit of timestamp), and even if I have to pick a bigger data format, I'd rather go for the 6-byte one. I've even seen a post that claims SQLite unix timestamp is of type REAL... Complete problem: Could someone please clarify that mess?

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  • Does JSONP scale? How many JSONP requests can I send?

    - by Cheeso
    Based on Please explain JSONP, I understand that JSONP can be used to get around the same-origin policy. But in order to do that, the page must use a <script> tag. I know that pages can dynamically emit new script tags, such as with: <script type="text/javascript" language='javascript'> document.write('<script type="text/javascript" ' + 'id="contentloadtag" defer="defer" ' + 'src="javascript:void(0)"><\/script>'); var contentloadtag=document.getElementById("contentloadtag"); contentloadtag.onreadystatechange=function(){ if (this.readyState=="complete") { init(); } } </script> (the above works in IE, don't think it works in FF). ... but does this mean, effectively, that every JSONP call requires me to emit another <script> tag into the document? Can I remove the <script> tags that are done?

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  • tabIndex fails in an AS3 swf loaded into a flex app

    - by quoo
    I feel like I'm missing something really simple here. I'm loading a AS3 swf containing a form (created by one of our designers) into a flex app. The swf's tabIndex properties work fine when the swf is viewed by itself, however, once it's loaded into the flex app: <mx:SWFLoader source="form.swf" top="20" horizontalCenter="0" id="formSwf" complete="swfCompleteHandler(event)"/> the form fields stop receiving focus on tab. I've been looking at the FocusManager in flex, for some sort of solution, but I can't seem to find any examples, and I'm not entirely sure I'm looking in the right place. Am I stuck redoing this form in flex?

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  • Problem with pre-beta sdk - even after reinstalling SDK 3.2

    - by Anders Brenna
    I'm trying to upload the binary for a new app, but always get this errormessage: "The binary you uploaded was invalid. A pre-release beta version of the SDK was used to build the application." I know several people have asked a similar question, but I've tried all suggestions from the answers there without success. I used the XCode 4.0 beta 3 during development, and I've tried using it to compile for earlier releases (3.0, 3.1.3, 3.2 etc...) I've also tried downgrading to SDK 3.2, as well as removing 4.0 beta 3 and then installing SDK 3.2 as a fresh install. It seems to me that there might be some parameter in the "Edit Project Settings" that is sticking from the use of 4.0 beta 3, but I've tried to identify them without success. My last option seem to be a complete reinstall of both OS and SDK. Is there something else I might try first?

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  • Disable CTRL+P in WPF DocumentViewer

    - by Groupal
    I'm working on a new presenation component for one of our applications. I am building a Custom WPF Control that just has a DocumentViewer in it and hosting that CC in a Windows Forms application with an ElementHost. I'm using Visual Studio 2008 with C#. I have customized everything through the XAML to give it the look and feel that integrates it perfecting into our application, but one thing remains... If you press CTRL+P the print dialog still comes up. I'm at a complete loss as to how to disable that fuction. The use of this CC is to allow the users to pull up and view the Manuals for the systems installed at that site, but we don't want them to accidently print them (100s of pages). Please help, -G

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  • jsonp is not firing beforeSend?

    - by user283357
    Hi All, I am working on a project to call a webservice from different domain using $.ajax with dataType set to jsonp. $.ajax({ type: "GET", url: testService.asmx, async: true, contentType: "application/json; charset=utf-8", dataType: "jsonp", beforeSend: function (XMLHttpRequest) { alert('Before Send'); //Nothing happnes }, success: function (response) { alert('Success'); //this was fired }, complete: function (XMLHttpRequest, textStatus) { alert('After Send'); //this was fired } }); The problem is I have a ...loading animation which I want to display while the web service request is being processed. I tried using "beforeSend:" to show the loading animation but it seems like "beforeSend" is not getting fired. The animation works fine when the app is on the same domain (using jsonp) but when I move the app into a different server, everything works except "beforeSend" is not getting called. So users will not be able to see the loading animation. Is there any workaround for this?

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  • ::LookupAccountSid API Extremely Slow When Targeting x64 Platform (Windows 7)

    - by Chris
    During our application startup, we are making a call to ::LookupAccountSid(). When I build targeting the x86 architecture, this call is nearly instantaneous. However, when I target x64 (debug or release), the call generally takes over 40s to complete. Since this is occurring during application startup, the result is fairly unpleasant as it will appear to the user that the application is not launching. I am running Windows 7 Professional 64-bit on a Dell Studio XPS 16 (Intel Core i7 Q 720). Our application is a native Windows application written in C++. My compiler options (CCOPTS) and linker options (LINKOPTS) are as follows: CCOPTS = "/nologo /Gz /W3 /EHs /c /DWIN32 /D_MBCS /Ob1 /vmg /vmv /Zi /MD /DNDEBUG /DDV_BUILD_DLL /DIV_BUILD_DLL /DDVASSERT_EXCEPTION /Zc:wchar_t-" LINKOPTS = "/manifest:no /nologo /machine:X64 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /DEBUG /subsystem:windows /DLL" Any help would be greatly appreciated :D

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  • What is the easiest way to have a local LAMP installation for web development on mac OS X ?

    - by pixeline
    I'm new to mac os x. In the Windows XP world, there are packages available, like easyPHP, wampserver, uniformserver, that enable you to have a local webserver complete with php, mysql configured via an automatic installer. Really handy. I need the same on my new mac. I know mac os x comes with a local webserver. Is this already with php, mysql preinstalled? I'd like to have you guys advise on the easiest way to have this local lamp so that i can continue developing on this nice and shiny machine. thanks!

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  • What is better: set up underestimated or overestimated deadlines?

    - by sergdev
    Suppose you are a project manager. You can estimate an effort in days for specific task for specific developer. After performing estimation you obtain some min and max values. After this you delegate a task to developer. Actually you also set up deadline. Which estimation is better to use when set up deadline: min or max? As I see min estimation can result in stress for developer, max estimation can result in using all the time which is allocated to developer even if task can be complete faster (so called Student syndrome). Which other pros and cons of two approaches? Small clarification: I speak about setting up deadlines for subordinates when delegating the task, NOT for reporting to my boss.

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  • Large file upload into WSS v3

    - by Rubens Farias
    I'd built an WSSv3 application which upload files in small chunks; when every data piece arrives, I temporarly keep it into a SQL 2005 image data type field for performance reasons**. Problem come when upload ends; I need to move data from my SQL Server to Sharepoint Document Library through WSSv3 object model. Right now, I can think two approaches: SPFileCollection.Add(string, (byte[])reader[0]); // OutOfMemoryException and SPFile file = folder.Files.Add("filename", new byte[]{ }); using(Stream stream = file.OpenBinaryStream()) { // ... init vars and stuff ... while ((bytes = reader.GetBytes(0, offset, buffer, 0, BUFFER_SIZE)) 0) { stream.Write(buffer, 0, (int)bytes); // Timeout issues } file.SaveBinary(stream); } Are there any other way to complete successfully this task? ** Performance reasons: if you tries to write every chunk directly at Sharepoint, you'll note a performance degradation as file grows up (100Mb).

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  • Basic OpenGL ES2 (iPhone Simulator) question...

    - by David
    Hi! I'm trying to modify the fragment shader which is part of the standard iPhone/XCode OpenGL ES template. I want to make it so that every other row of pixels is transparent. I have this code so far: varying lowp vec4 colorVarying; void main() { gl_FragColor = vec4(colorVarying.x, colorVarying.y, colorVarying.z, floor(mod(gl_FragCoord.y, 2.0))); } But when I compile and run I still get the same square moving up and down with no other effects. What am I doing wrong here? I'm a complete n00b at Glsl - I'm trying to teach myself the very basics. (starting with this tutorial - http://www.mobileorchard.com/getting-started-with-opengl-es-20-on-the-iphone-3gs/) Please help! Thanks! David :)

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  • Fastest way to do mass update

    - by user356004
    Let’s say you have a table with about 5 million records and a nvarchar(max) column populated with large text data. You want to set this column to NULL if SomeOtherColumn = 1 in fastest possible way. The brute force UPDATE does not work very well here because it will create large implicit transaction and take forever. Doing updates in small batches of 50K records at a time works but it’s still taking 47 hrs to complete on beefy 32 core/64GB server. Is there any way to do this update faster? Are there any magic query hints/table options that scarifies something else (like concurrency) in exchange of speed? NOTE: Creating temp table or temp column is not an option because this nvarchar(max) column involves lots of data and so consumes lots of space!

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  • Multi-threading mechanisms to run some lengthy operations from winforms code and communication with

    - by tmarouda
    What do I want to achieve: I want to perform some time consuming operations from my MDI winforms application (C# - .NET). An MDI child form may create the thread with the operation, which may take long time (from 0.1 seconds, to even half hour) to complete. In the meantime I want the UI to respond to user actions, including manipulation of data in some other MDI child form. When the operation completes, the thread should notify the MDI child that the calculations are done, so that the MDI child can perform the post-processing. How can I achieve this: Should I use explicit threading (i.e., create explicit threads), thread pools? Or simply just propose your solution. Should I create foreground or background threads? And how does the thread communicates with the GUI, according the solution you propose? If you know of a working example that handles a similar situation, please make a note.

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  • using WP_Query with custom SQL in wordpress

    - by Matt Facer
    Hi. I am writing a plugin for wordpress and I want to create my own search. I have tried to alter the wordpress search, but what I am doing is very specific with the SQL query. I am comparing lat and long coordinates and getting posts based on that. I can display posts by using the standard wpdb query, but then I don't get the other features like paging. I'd like to be able to use my SQL statement with the WP_Query function. If I'm right in thinking, I should then be able to use the paging and other features which come from the $posts global variable. Is this right?? I've googled for hours but can't find anything for plugins outside of using args to select categories etc. I simply need to send a complete SQL command - nothing else. Many thanks....

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  • iOS Efficiency File Saving Efficiency

    - by Guvvy Aba
    I was working on my iOS app and my goal is to save a file that I am receiving from the internet bit by bit. My current setup is that I have a NSMutableData object and I add a bit of data to it as I receive my file. After the last "packet" is received, I write the NSData to a file and the process is complete. I'm kind of worried that this isn't the ideal way to do it because of the limitations of RAM in a mobile device and it would be problematic to receive large files. My next thought was to implement a NSFileHandle so that as the file arrives, it would be saved to the disk, rather than the virtual memory. In terms of speed and efficiency, which method do you think will work decently on an iOS device. I am currently using the first, NSMutableData approach. Is it worth changing my app to use the NSFileHandle? Thanks in advance, Guvvy

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  • Asp.Net Program Architecture

    - by Pino
    I've just taken on a new Asp.Net MVC application and after opening it up I find the following, [Project].Web [Project].Models [Project].BLL [Project].DAL Now, something thats become clear is that there is the data has to do a hell of a lot before it makes it to the View (DatabaseDALRepoBLLConvertToModelControllerView). The DAL is Subsonic, the repositorys in the DAL return the subsonic entities to the BLL which process them does crazy things and converts them into a Model (From the .Models) sometimes with classes that look like this public DataModel GetDataModel(EntityObject Src) { var ReturnData = new DataModel(): ReturnData.ID = Src.ID; ReturnDate.Name = Src.Name; //etc etc } Now, the question is, "Is this complete overkill"? Ok the project is of a decent size and can only get bigger but is it worth carrying on with all this? I dont want to use AutoMapper as it just seems like it makes the complication worse. Can anyone shed any light on this?

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  • VS2010 / Code Analysis: Turn off a rule for a project without custom ruleset....

    - by TomTom
    ...any change? The scenario is this: For our company we develop a standard how code should look. This will be the MS full rule set as it looks now. For some specific projects we may want to turn off specific rules. Simply because for a specific project this is a "known exception". Example? CA1026 - while perfectly ok in most cases, there are 1-2 specific libraries we dont want to change those. We also want to avoid having a custom rule set. OTOH putting in a suppress attribute on every occurance gets pretty convoluted pretty fast. Any way to turn off a code analysis warning for a complete assembly without a custom rule set? We rather have that in a specific file (GlobalSuppressions.cs) than in a rule set for maintenance reasons, and to be more explicit ;)

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  • Running Perl on Windows 7 error

    - by Eyla
    Greeting, I'm trying to run smaple perl script on windows 7 and I configured IIS 7 to allow activeperl to run but I'm getting this error: HTTP Error 502.2 - Bad Gateway The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are "Hello World. ". Module CgiModule Notification ExecuteRequestHandler Handler Perl Script (PL) Error Code 0x00000000 Requested URL http://localhost:80/hello.pl Physical Path C:\inetpub\wwwroot\hello.pl Logon Method Anonymous Logon User Anonymous and here is my perl script : #!/usr/bin/perl print "Hello World.\n"; please any advice to handle this case!!!

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  • How does TransactionScope guarantee data integrity across multiple databases?

    - by Bas Smit
    Hey guys, Can someone tell me the principle of how TransactionScope guarantees data integrity across multiple databases? I imagine it first sends the commands to the databases and then waits for the databases to respond before sending them a message to apply the command sent earlier. However when execution is stopped abruptly when sending those apply messages we could still end up with a database that has applied the command and one that has not. Can anyone shed some light on this? Edit: I guess what Im asking is can I rely on TransactionScope to guarantee data integrity when writing to multiple databases in case of a power outage or a sudden shutdown. Thanks, Bas Example: using(var scope=new TransactionScope()) { using (var context = new FirstEntities()) { context.AddToSomethingSet(new Something()); context.SaveChanges(); } using (var context = new SecondEntities()) { context.AddToSomethingElseSet(new SomethingElse()); context.SaveChanges(); } scope.Complete(); }

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  • Python 2 vs Python 3 and Tutorial

    - by MR-J
    Hey guys. I am 12 years old and I have had a small amount of experience with BASIC. I am thinking about learning Python, but I’m not sure if I should learn the 2.6 version or the 3.0 version. I don’t really care about the support for libraries or anything along those lines quite yet. I was wondering if it is easier to code in 3.0 than 2.6. And is it more fun and productive? I would also appreciate it if you could point me in the right direction for a simple yet complete tutorial that is easy to understand and possible teaches Object Oriented Programing. I don’t really care if it teaches OOP or not. One more thing; if I do learn python, is it possible to easily compile a python source code file into a 'stand-alone' .exe file for Windows? I really liked that functionality in BASIC. Thanks!!!!

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  • Are SOLID principles really solid?

    - by Arseny
    The first pattern stands for this acronym is SRP. Here is a quote. the single responsibility principle states that every object should have a single responsibility, and that responsibility should be entirely encapsulated by the class. That's is simple and clear till we start to code ) Suppose we have a class with well defined SRP. To serialize this class instances we need to add special atrributes to that class. So now the class have other responsibility. Dosen't it violate SRP? Let's see other story. Interface implementation. Then we implement an interface we simply add other responsibility say dispose its resorces or compare its instances or whatever. So my question. Is it possible to keep SRP complete? How can we do it?

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  • Any working tutorials for Authlogic?

    - by Mark Wilbur
    I've been trying to build my first rails app and have gotten stuck on the issue of user authentication. I've found a number of tutorials for using various plug-ins to do this, but so far every single one of them is out-dated, and as a result, broken! From what I've read, I think Authlogic may be the best fit for me, and I've tried two things: 1) Going through Railscast, episode #160 (which is a tutorial for setting it up) 2) Using Ryan B's nifty_authentication gem with the --authlogic tag In both cases, I get the following error as soon as I try to do anything with a user: undefined local variable or method `acts_as_authentic' for # I believe this is from the User model: class User < ActiveRecord::Base acts_as_authentic end I'm sure I've installed the authlogic gem, and I've added config.gem "authlogic" to my environment.rb Any ideas about what's wrong? Anybody know of a complete and up to date tutorial for adding user authentication?

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