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• Understanding prototype method calls

  - by Tristan

  In trying to call a method on the CodeMirror javascript code editor. I'm new to javascript and trying to understand how object oriented stuff works. I'm having problems calling what I believe are methods. For instance, var editor = CodeMirror.fromTextArea('code', options); editor.grabKeys(function(e) { alert("Key event");}); This gives the Uncaught TypeError: Cannot call method 'grabKeys' of undefined. Looking at the editor object reveals that grabKeys seems to be located at editor.__proto__.grabKeys. How should I be thinking about this?

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• call a class method from inside an instance method from a module mixin (rails)

  - by sean

  Curious how one would go about calling a class method from inside an instance method of a module which is included by an active record class. For example I want both user and client models to share the nuts and bolts of password encryption. # app/models class User < ActiveRecord::Base include Encrypt end class Client < ActiveRecord::Base include Encrypt end # app/models/shared/encrypt.rb module Encrypt def authenticate # I want to call the ClassMethods#encrypt_password method when @user.authenticate is run self.password_crypted == self.encrypt_password(self.password) end def self.included(base) base.extend ClassMethods end module ClassMethods def encrypt_password(password) Digest::SHA1.hexdigest(password) end end end However, this fails. Says that the class method cannot be found when the instance method calls it. I can call User.encrypt_password('password') but User.new.encrypt_password fails Any thoughts?

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• JPG File Size Optimization - PHP, ImageMagick, & Google's Page Speed

  - by Sonny

  I have photo gallery code that does image re-sizing and thumbnail creation. I use ImageMagick to do this. I ran a gallery page through Google's Page Speed tool and it revealed that the re-sized images and thumbnails both have about an extra 10KB of data (JPEG files specifically). What can I add to my scripts to optimize the file size? ADDITIONAL INFORMATION I am using the imagick::FILTER_LANCZOS filter with a blur setting of 0.9 when calling the resizeImage() function. JPEGs have a quality setting of 80.

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• How to tell whether Code Access Security is allowed in library code

  - by Sander Rijken

  In .NET 4 Code Access Security (CAS) is deprecated. Whenever you call a method that implicitly uses it, it fails with a NotSupportedException, that can be resolved with a configuration switch that makes it fall back to the old behavior. We have a common library that's used in both .NET 3.5 and .NET 4, so we need to be able to tell whether or not we should use the CAS method. For example, in .NET 3.5 I should call: Assembly.Load(string, Evidence); Whereas in .NET 4 I want to call Assembly.Load(string); Calling Load(string, Evidence) throws a NotSupportedException. Of course this works, but I'd like to know if there's a better method: try { asm = Assembly.Load(someString, someEvidence); } catch(NotSupportedException) { asm = Assembly.Load(someString); }

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• Can GhostScript run in Medium Trust

  - by SkippyFire

  I am using GhostScript to generate some thumbnails of PDF pages in an ASP.NET application. I have it wrapped in this library called GhostScriptSharp that just uses DllImport to call methods in the GhostScript DLL. It looks like this wont work on a medium trust hosting environment, either because of the fact that it is calling unmanaged code, or that it looks like the library is creating files all over the place (outside my virtual directory). I ran Process Monitor and saw it trying to Read, QueryNameInformationFile, CreateFile and QueryStandardInformationFile in places like: C:\WINDOWS\system32\Halftone\Default or C:\gs\gs8.63\lib\Halftone\Default or C:\gs\font\Halftone\Default Any ideas about whether this is "fixable" to run in medium trust? If I can't use GhostScript, is there another free/open source library that WILL work in Medium trust?

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• Why are listener lists Lists?

  - by Joonas Pulakka

  Why are listener lists (e.g. in Java those that use addXxxListener() and removeXxxListener() to register and unregister listeners) called lists, and usually implemented as Lists? Wouldn't a Set be a better fit, since in the case of listeners there's No matter in which order they get called (although there may well be such needs, but they're special cases; ordinary listener mechanisms make no such guarantees), and No need to register the same listener more than once (whether doing that should result in calling the same listener 1 times or N times, or be an error, is another question) Is it just a matter of tradition? Sets are some kind of lists under the hood anyway. Are there performance differences? Is iterating through a List faster or slower than iterating through a Set? Does either take more or less memory? The differences are certainly almost negligible.

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• How to call web service with Android

  - by BobbyShaftoe

  I am having a lot of trouble finding good information on how to call a standard SOAP/WSDL web service with Android. All I've been able to find are either very convoluted documents and references to "kSoap2" and then some bit about parsing it all manually with SAX. ... Ok, that's fine but it's 2008 so I figured there should be some good library for calling standard web services. The Web Service is just basically one created in NetBeans. I would like to have IDE support for generating the plumbing classes. I just need the easiest/most-elegant way to contact a WSDL based web service from an Android based phone. Thanks.

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• AjaxSubmit File Upload - Trying to get response $(document).ready() to fire

  - by ncyankee

  I'm using the jquery form plugin (http://malsup.com/jquery/form/) to upload a file via ajax which is processed in the background. The upload is working correctly, and I am using ASP.Net MVC to return a partial view which contains a $(document).ready call to setup a 'timer' to check on the status of the upload file's processing status. When I return the partial view which contains a script block wit ha $(document).ready call, it is never fired, therefore the 'timer' to check for the status of the upload is never started. When I do this via a regular $.post call (without upload) the function fires correctly after the html is loaded into the DOM. Is there anything else I need to do when calling the ajaxSubmit function to get this to fire? Just a sample bit of code: $('form').live('submit', function () { $(this).ajaxSubmit({ success: function (data) { $('#statusDiv').html(data); } }); return false; });

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• lwjgl applets 101: How can I write them?

  - by Vuntic

  I have a working app in lwjgl. It doesn't do much yet; I've just started, but it does compile and run like it's supposed to. I want to make it into an applet. I've followed the guide here, and I have an applet that runs nicely and displays text and such in the applet area and can access the functions of lwjgl (like Sys.alert), but I can't figure out how to get opengl to actually render. I've tried extending an AWTGLCanvas and calling this.add(myAWTGLCanvas), where this is the Applet that I'm using, but... nothing. The initGL() and paintGL() methods never get called. I wonder if I'm supposed to be doing something with Display, but that's not for applets, right? Help? Also: This counts as a "beginner" question, right?

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• IEnumerable.GetEnumerator() and IEnumerable<T>.GetEnumerator()

  - by Dylan Lin

  Hi, In the .net framework, there's a generic IEnumerable<T> interface which inherits from the not-generic IEnumerable, and they both have a GetEnumerator() method. The only differents between these two GetEnumerator() is the return type. Now I have a similar design, but when I compile the code, the compiler said: MyInterface<T>.GetItem()' hides inherited member 'MyInterface.GetItem()'. Use the new keyword if hiding was intended. The MyInterface<T>.GetItem() returns a concrete type T, while MyInterface.GetItem() returns type System.Object. So I think if the BCL team guys compile the .net framework, they will get the same warning. I think having compiler warnings is not good, what do you think? And how can I solve this problem? I mean I want to get the concrete type T when calling the MyInterface<T>.GetItem() not just a instance of type System.Object. Thanks in advance! :-)

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• Unix shell script with Iseries command

  - by user293058

  I am trying to ftp a file from unix to as400 and executing iseries command in the script. ftp is working fine,I am getting an error in jobd command as HOST=KCBNSXDD.svr.us.bank.net USER=test PASS=1234 #This is the password for the FTP user. ftp -env $HOST << EOF # Call 2. Here the login credentials are supplied by calling the variables. user $USER $PASS # Call 3. Here you will change to the directory where you want to put or get cd "\$QARCVBEN" # Call4. Here you will tell FTP to put or get the file. #Ebcdic #Mode b quote site crtccsid *user quote site crtccsid *sysval put prod.txt quote rcmd sbmjob cmd(call pgm(pmtiprcc0) parm('prod' 'DEV')) job(\$pmtiprcc) jobd(orderbatch) 550-Error occurred on command SBMJOB cmd(call pgm(pmtiprcc0)) job($pmtiprcc) jobd(orderbatch). 550 Errors occurred on SBMJOB command.. 221 QUIT subcommand received.

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• Are the ASP.net __EVENTTARGET and __EVENTARGUMENT susceptible to SQL injection?

  - by Schleichermann

  A security review was done against one of our ASP.net applications and returned in the test results was a SQL Injection Exposures considered to be a high risk item. The test that was performed passed a SQL statement as the value of the __EVENTTARGET and the __EVENTARGUMENT. I am wondering since these 2 values are ASP.net auto-generated hidden fields used for the Auto-Postback feature of the framework and hold information specific to the controls initiating the postback, is there really the potential for SQL injection if you are never manually calling and or pulling values out of these parameters in your code behind?

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• Core Data performance deleteObject and save managed object context

  - by Gary

  I am trying to figure out the best way to bulk delete objects inside of my Core Data database. I have some objects with a parent/child relationship. At times I need to "refresh" the parent object by clearing out all of the existing children objects and adding new ones to Core Data. The 'delete all' portion of this operation is where I am running into trouble. I accomplish this by looping through the children and calling deleteObject for each one. I have noticed that after the NSManagedObjectContext:Save call following all of the deleteObject calls is very slow when I am deleting 15,000 objects. How can I speed up this call? Are there things happening during the save operation that I can be aware of and avoid by setting parameters different or setting up my model another way? I've noticed that memory spikes during this operation as well. I really just want to "delete * from". Thanks.

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• Getting document.xml from a docx file using ZipInputStream

  - by meenakshik

  Hello, I have a inputStream of a docx file and I need to get hold of the document.xml which lies inside the docx. I am using ZipInputStream to read my stream and my code is something like ZipInputStream docXFile = new ZipInputStream(fileName); ZipEntry zipEntry; while ((zipEntry = docXFile.getNextEntry()) != null) { if(zipEntry.getName().equals("word/document.xml")) { System.out.println(" --> zip Entry is "+zipEntry.getName()); } } As you can see The output for zipEntry.getName comes as "word/document.xml" at some point. I need to pass this document.xml as a stream and unlike the ZipFile method where you can easily pass this on calling .getInputStream, I am wondering how can I do this docXFile? Thanks in advance, Meenakshi

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• Silverlight WCF method calls fails if WCF service is not running initially

  - by Craig

  Quite simply I have a generic Silverlight 3.0 web page that is calling a Ping method on a WCF service. I do not have the WCF service running initially when I navigate to this Silverlight page. As expected I get a communication exception when I press the Silverlight button to call the Ping method, which I catch. Now if I start the WCF service and press the Ping button I still get the communication exception. How come? The other scenario is the WCF is running when I navigate to the SL page and the Ping method call works. I turn off the WCF service, ping method fails. Turn it back on and the ping method succeeds. How come if it's not running initially the ping method fails always? I could include some sample code if you'd like but this is just a real simple Hello World example using basichttpbinding, straight out the book. Thanks, Craig

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• How to use SharpSVN to (quickly) check if a remote folder/file exists on the server

  - by Ziphnor

  Say i have a svn repository at https://www.mysvn.com/svn/. How can i use SharpSVN to figure out whether the remote folder https://www.mysvn.com/svn/a/b/c exists on the server? I need to do it an a way that allows me to tell the difference between a failed connection (ie server down) and the folder simply not having been created yet. Calling info on the full https://www.mysvn.com/svn/a/b/c path does not seem to give an exception that enables me to tell the difference between no repository at all and just a missing folder. I could list all files for https://www.mysvn.com/svn/ but the repository can easily be so big that this can take too long. Right now im doing an info on first the root url and then on the full url. If the root url fails i treat it as a server problem, but if it succeeds and the full url fails i assume its because part of the path hasnt been created on the server.

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• C#: How to set AsyncWaitHandle in Compact Framework?

  - by Thorsten Dittmar

  Hi, I'm using a TcpClient in one of my Compact Framework 2.0 applications. I want to receive some information from a TCP server. As the Compact Framework does not support the timeout mechanisms of the "large" framework, I'm trying to implement my own timeout-thing. Basically, I want to do the following: IAsyncResult result = client.BeginRead(buffer, 0, size, ..., stream); if (!result.AsyncWaitHandle.WaitOne(5000, false)) // Handle timeout private void ReceiveFinished(IAsyncResult ar) { NetworkStream stream = (NetworkStream)ar.AsyncState; int numBytes = stream.EndRead(ar); // SIGNAL IASYNCRESULT.ASYNCWAITHANDLE HERE ... HOW?? } I'd like to call Set for the IAsyncResult.AsyncWaitHandle, but it doesn't have such a method and I don't know which implementation to cast it to. How do I set the wait handle? Or is it automatically set by calling EndRead? The documentation suggests that I'd have to call Set myself... Thanks for any help!

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• Why does TheyWorkForYou (TWFY) web API always returns '{}'

  - by Tartley

  I'm calling a web API exposed by TheyWorkForYou (TWFI). http://www.theyworkforyou.com/api/ I'm using the Python bindings provided by twfython: http://code.google.com/p/twfython/ I wrote some code to call this API a few months ago, at which time it worked fine. But now I dig it out to run it again, no matter what query I ask of the API, it always returns '{}' (an empty dictionary). For example the following code, which should return a list of all MPs: from twfy import TWFY API_KEY = 'XXXXXXXXXXXXXXXXXXXXXX' twfy = TWFY.TWFY(API_KEY) print twfy.api.getMPs(output='js') Am I being really dumb? What else should I check?

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• putpixel with pyglet

  - by pts

  I'm new to pyglet. I'd like to change a pixel from black to white at each on_draw iteration. So after 1000 iterations, there should be exactly 1000 white pixels in the window. However, I'd like to avoid calling 1000 draw operations in on_draw for that. So I'd like to create an image, do an RGB putpixel on the image, and blit the image to the screen. How can I do that? The pyglet documentation, the examples and the source code aren't too helpful on this.

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• Win32 API Question

  - by Lalit_M

  We have developed a ASP.NET web application and has implemented a custom authentication solution using active directory as the credentials store. Our front end application uses a normal login form to capture the user name and password and leverages the Win32 LogonUser method to authenticate the user’s credentials. When we are calling the LogonUser method, we are using the LOGON32_LOGON_NETWORK as the logon type. The issue we have found is that user profile folders are being created under the C:\Users folder of the web server. The folder seems to be created when a new user who has never logged on before is logging in for the first time. As the number of new users logging into the application grows, disk space is shrinking due to the large number of new user folders getting created. Has anyone seen this behavior with the Win32 LogonUser method? Does anyone know how to disable this behavior?

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• trying to pass file name from aspx page to console.exe

  - by ryder1211212

  i want to pass the value of a lable or textbox in an aspx page to a console.exe application such that the if the value is sample.doc it changes to that. i am calling from the aspx page with string f = TextBox1.Text; System.Diagnostics.Process.Start("C:/DocUpload/ConsoleApplication1.exe", f); i have tried converting to string then using the string vatiable inplace of sample.doc but no luck object FileName = System.IO.Path.Combine(ExecutableFileInfo.DirectoryName, "sample.doc"); any help or ideas will be welcomed. thank u

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• How to set global hook for WH_CALLWNDPROCRET ?

  - by user261882

  Hello I want to set global hook that tracks which application is active. In my main program I am doing the foloowing : HMODULE mod=::GetModuleHandle(L"HookProcDll"); HHOOK rslt=(WH_CALLWNDPROCRET,MyCallWndRetProc,mod,0); The hook procedure which is called MyCallWndRetProc exists in separate dll called HookProcDll.dll. The hook procedure is watching for WM_ACTIVATE message. The thing is that the code stucks in the line where I am setting the hook, i.e in the line where I am calling ::SetWindowsHookEx. And then Windows gets unresponsive, my task bar disappears and I am left with empty desktop. Then I must reset the computer. What am doing wrong, why Windows get unresponsive ? and Do I need to inject HookProcDll.dll in every process in order to set the global hook, and how can I do that ?

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• Android: How to call call ndk function from AsyncTask?

  - by user1628803

  I have a lot of jni calls in my Android projects which work like a charm but this one I just can't get right: When trying to call a jni function from an AsyncTask in Android I get this error message: 11-30 10:07:20.130: W/dalvikvm(16555): No implementation found for native Lcom/company/MainView$MyAsyncTask;.MyFunction (Ljava/lang/String;)Z When usually the jni function declaration works like this: JNIEXPORT jboolean JNICALL Java_com_company_MainView_myFunction()... how would i declare it when calling from an AscnyTask? I didn't find the answer on Google and I have unsuccessfully tried: JNIEXPORT jboolean JNICALL Java_com_company_MainView$MyAsyncTask_myFunction() and JNIEXPORT jboolean JNICALL Java_com_company_MainView_MyAsyncTask_myFunction() Or is this not possible at all?

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• How do you handle the fetchxml result data?

  - by Luke Baulch

  I have avoided working with fetchxml as I have been unsure the best way to handle the result data after calling crmService.Fetch(fetchXml). In a couple of situations, I have used an XDocument with LINQ to retrieve the data from this data structure, such as: XDocument resultset = XDocument.Parse(_service.Fetch(fetchXml)); if (resultset.Root == null || !resultset.Root.Elements("result").Any()) { return; } foreach (var displayItem in resultset.Root.Elements("result").Select(item => item.Element(displayAttributeName)).Distinct()) { if (displayItem!= null && displayItem.Value != null) { dropDownList.Items.Add(displayItem.Value); } } What is the best way to handle fetchxml result data, so that it can be easily used. Applications such as passing these records into an ASP.NET datagrid would be quite useful.

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• Running a batch file from Perl (Activestate perl in Windows)

  - by Jithesh

  I have a Perl program which does something like below: #!perl use strict; use warnings; my $exe = "C:\\project\\set_env_and_run.bat"; my $arg1 = "\\\\Server\\share\\folder1"; my $arg2 = "D:\\output\\folder1"; my $cmd = "$exe \"$arg1\" \"$arg2\""; my $status = system("$cmd > c:\\tmp\out.txt 2>&1"); print "$status\n"; I am calling this Perl code in an eval block. When invoked, i get the status printed as 0, but the batch file has not actually executed. What would be the reason for this? Thanks, Jits

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