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  • Java REPL shell

    - by Don
    Hi, I'm looking for a REPL shell that I can use to test out snippets of Java code. Either a desktop app, or a web app (like the Groovy web console). Ideally, commonly used Java packages like: java.io.* java.util.* should be automatically imported, so that I can copy and paste code from a class without having to add a bunch of imports. Does such a thing exist? Thanks, Donal

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  • Declaring object type as NSManagedObject or class name

    - by Don Fulano
    In Core Data, if I have a Person entity is there any difference between: NSManagedObject *aPerson = [NSEntityDescription insertNewObjectForEntityForName:@"Person" inManagedObjectContext:[self managedObjectContext]]; or Person *aPerson = [NSEntityDescription insertNewObjectForEntityForName:@"Person" inManagedObjectContext:[self managedObjectContext]]; Should aPerson be of type Person or NSManagedObject? Is there a difference?

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  • Laplacian of Gaussian

    - by Don
    I am having trouble implementing a LoG kernel. I am trying to implement 9x9 kernal with theta = 1.4 as shown in this link http://homepages.inf.ed.ac.uk/rbf/HIPR2/log.htm. However, I am having difficulty with the formula itself.For whatever values I input into the formula, I don't get any of the values in a 9x9 LoG kernel with theta = 1. 4. If someone can provide an example of how they got one of the big values ie -40 or -23, or the code to implement it, It'd be greatly appreciated. Thank you

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  • Error releasing Grails plugin

    - by Don
    Hi, I checked out the trunk of my plugin from the Grails svn repo, made some changes, incremented the version number to 0.2.1, then ran release-plugin. It failed with the error shown below: Checking in plugin zip... Updating from SVN... Updated to revision 61343. Committing local, please wait... Enter a SVN commit message: Fixed bug with controller dependency version and upgraded to grails 1.2.2 Committing code. Please wait... Failed to stat working directory: svn: Commit failed (details follow): svn: Authentication required for '<https://svn.codehaus.org:443> grails-plugins primary Subversion repository' Application context shutting down... Application context shutdown. It's possible that my password is not correct, but I'm pretty sure it is. Does anyone know what the problem could be, and is there some way I can verify that the password I'm using is correct?

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  • Issues with mx:method, mx.rpc.remoting.mxml.RemoteObject, and sub-classing mx.rpc.remoting.mxml.Remo

    - by Ryan Wilson
    I am looking to subclass RemoteObject. Instead of: <mx:RemoteObject ... > <mx:method ... /> <mx:method ... /> </mx:RemoteObject> I want to do something like: <remoting:CustomRemoteObject ...> <mx:method ... /> <mx:method ... /> </remoting:CustomRemoteObject> where CustomRemoteObject extends mx.rpc.remoting.mxml.RemoteObject like so: package remoting { import mx.rpc.remoting.mxml.RemoteObject; public class CustomRemoteObject extends RemoteObject { public function CustomRemoteObject(destination:String=null) { super(destination); } } } However, when doing so and declaring a CustomRemoteObject in MXML as above, the flex compiler shows the error: Could not resolve <mx:method> to a component implementation At first I thought it had something to do with CustomRemoteObject failing to do something, despite that (or since) it had no change except as to the name. So, I copied the source from mx.rpc.remoting.mxml.RemoteObject into CustomRemoteObject and modified it so the only difference was a refactoring of the class and package name. But still, the same error. Unlike many MXML components, I cannot cmd+click <mx:method> in FlashBuilder to open the source. Likewise, I have not found a reference in mx.rpc.remoting.mxml.RemoteObject, mx.rpc.remoting.RemoteObject, or mx.rpc.remoting.AbstractService, and have been unsuccessful in find its source online. Which leads me to the questions in the title: What exactly is <mx:method>? (yes, I know it's a declaration of a RemoteObject method, and I know how to use it, but it's peculiar in regard to other components) Why did my attempt at subclassing RemoteObject fail, despite it effectually being a rename? Perhaps the root, why can mx.rpc.remoting.mxml.RemoteObject as an MXML declaration accept <mx:method> child tags, yet the source of said class cannot when refactored in name only?

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  • Getting error: "This webpage is not available" for my chrome app's options page

    - by Don Rhummy
    My CRX had the proper html page options.html in it, the manifest declares it properly (it shows up as a link on the chrome://extensions page) but when I click that link, Chrome gives the error: This webpage is not available The webpage at chrome-extension://invalid/ might be temporarily down or it may have moved permanently to a new web address. It says "invalid" but the app runs perfectly well (all the content scripts run, the background created a database and saved to it). Why would it show as invalid? Why doesn't it have the extensions' id? Here's the manifest: { "manifest_version": 2, "name": "MyAPP", "description": "My App", "version": "0.0.0.32", "minimum_chrome_version": "27", "offline_enabled": true, "options_page": "options.html", "icons": { "16": "images/icon16.png", "48": "images/icon48.png", "128": "images/icon128.png" }, "app": { "background": { "scripts": [ "scripts/background.js" ] } }, "permissions": [ "unlimitedStorage", "fullscreen", { "fileSystem": [ "write" ] }, "background", "<all_urls>", "tabs" ] } Does it need to be declared in "web_accessible_resources"? Any idea what's wrong? Update Adding to "web_accessible_resources" does not fix the issue. I added everything on that page too. update 2 It looks like it might be a Chrome bug for packaged apps. When I remove the "app" section in the manifest, it works! This is a bug since the Chrome app documentation states that apps can have options pages: https://developer.chrome.com/apps/options.html

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  • MSI Install Folder Composed with Value from Radio Dialog

    - by Don Vince
    I'm using .NET2, I have an installer project. In the User Interface, I've created a RadioButtons (3 Buttons) dialog box. I've placed it before the Installation Folder Dialog. I wish to incorporate the value selected in the RadioButtons dialog as part of the Installation Folder. To do this I've placed the name of the variable amongst the path where I wish to use it in the DefaultLocation: [ProgramFilesFolder][Manufacturer]\[ProductName]\[BUTTON3] The effect of this is that the default value for the variable, BUTTON3 in the example above, is resolved as part of the folder, not the selected value. Anybody know how to make this variable use delayed expansion in some way to get the selected value?

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  • Printing an invisible NSView

    - by Rodger Wilson
    Initially I created a simple program with a custom NSView. I drew a picture (certificate) and printed it! beautiful! Everything worked great! I them moved my custom NSView to an existing application. My hope was that when a user hit print it would print this certificate. Simple enough. I figured a could have a NSView pointer in my controller code. Then at initialization I would populate the pointer. Then when someone wanted to print the certificate it would print. The problem is that all of my drawing code is in the "drawRect" method. This method doesn't get called because this view is never displayed in a window. I have heart that others use non-visible NSView objects just for printing. What do I need to do. I really don't want to show this view to the screen. Rodger

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  • How do I antialias the clip boundary on Android's canvas?

    - by Jesse Wilson
    I'm using Android's android.graphics.Canvas class to draw a ring. My onDraw method clips the canvas to make a hole for the inner circle, and then draws the full outer circle over the hole: clip = new Path(); clip.addRect(outerCircle, Path.Direction.CW); clip.addOval(innerCircle, Path.Direction.CCW); canvas.save(); canvas.clipPath(clip); canvas.drawOval(outerCircle, lightGrey); canvas.restore(); The result is a ring with a pretty, anti-aliased outer edge and a jagged, ugly inner edge: What can I do to antialias the inner edge? I don't want to cheat by drawing a grey circle in the middle because the dialog is slightly transparent. (This transparency isn't as subtle on on other backgrounds.)

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  • IE8 won't load JavaScript file in "Compatibility View."

    - by Don Jones
    Here's my JS insert: <script type="text/javascript" src="include/profile.js"></script> In IE8 with "Compatibility View," the file never loads. The first line in the file is a simple alert() call, so that I know it loaded. Change the browser to Standards View, and it loads fine. Also, if I add: <meta http-equiv="X-UA-Compatible" content="IE=100" > It forces to Standards View and it loads fine. Any idea why this would be the case? I've not been able to test against IE7, but I know the JS file also does not load in IE6. Right now the tag is in the section of the file.

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  • Late resolution of MSI variable for part of install folder path

    - by Don Vince
    In a setup project, on User Interface, I've created a RadioButtons (3 Buttons) dialog box. I've placed it before the Installation Folder Dialog. I wish to incorporate the value selected in the RadioButtons dialog as part of the Installation Folder. To do this I've placed the name of the variable amongst the path where I wish to use it in the DefaultLocation: [ProgramFilesFolder][Manufacturer]\[ProductName]\[BUTTON3] The effect of this is that the default value for the variable, BUTTON3 in the example above, is resolved as part of the folder, not the selected value. Anybody know how to make this variable use delayed expansion in some way to get the selected value?

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  • Problem with GWT behind a reverse proxy - either nginx or apache

    - by Don Branson
    I'm having this problem with GWT when it's behind a reverse proxy. The backend app is deployed within a context - let's call it /context. The GWT app works fine when I hit it directly: http://host:8080/context/ I can configure a reverse proxy in front it it. Here's my nginx example: upstream backend { server 127.0.0.1:8080; } ... location / { proxy_pass http://backend/context/; } But, when I run through the reverse proxy, GWT gets confused, saying: 2009-10-04 14:05:41.140:/:WARN: Login: ERROR: The serialization policy file '/C7F5ECA5E3C10B453290DE47D3BE0F0E.gwt.rpc' was not found; did you forget to include it in this deployment? 2009-10-04 14:05:41.140:/:WARN: Login: WARNING: Failed to get the SerializationPolicy 'C7F5ECA5E3C10B453290DE47D3BE0F0E' for module 'https://hostname:444/'; a legacy, 1.3.3 compatible, serialization policy will be used. You may experience SerializationExceptions as a result. 2009-10-04 14:05:41.292:/:WARN: StoryService: ERROR: The serialization policy file '/0445C2D48AEF2FB8CB70C4D4A7849D88.gwt.rpc' was not found; did you forget to include it in this deployment? 2009-10-04 14:05:41.292:/:WARN: StoryService: WARNING: Failed to get the SerializationPolicy '0445C2D48AEF2FB8CB70C4D4A7849D88' for module 'https://hostname:444/'; a legacy, 1.3.3 compatible, serialization policy will be used. You may experience SerializationExceptions as a result. In other words, GWT isn't getting the word that it needs to prepend /context/ hen look for C7F5ECA5E3C10B453290DE47D3BE0F0E.gwt.rpc, but only when the request comes throught proxy. A workaround is to add the context to the url for the web site: location /context/ { proxy_pass http://backend/context/; } but that means the context is now part of the url that the user sees, and that's ugly. Anybody know how to make GWT happy in this case? Software versions: GWT - 1.7.0 (same problem with 1.7.1) Jetty - 6.1.21 (but the same problem existed under tomcat) nginx - 0.7.62 (same problem under apache 2.x) I've looked at the traffic between the proxy and the backend using DonsProxy, but there's nothing noteworthy there.

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  • What Scheme Does Ghuloum Use?

    - by Don Wakefield
    I'm trying to work my way through Compilers: Backend to Frontend (and Back to Front Again) by Abdulaziz Ghuloum. It seems abbreviated from what one would expect in a full course/seminar, so I'm trying to fill in the pieces myself. For instance, I have tried to use his testing framework in the R5RS flavor of DrScheme, but it doesn't seem to like the macro stuff: src/ghuloum/tests/tests-driver.scm:6:4: read: illegal use of open square bracket I've read his intro paper on the course, An Incremental Approach to Compiler Construction, which gives a great overview of the techniques used, and mentions a couple of Schemes with features one might want to implement for 'extra credit', but he doesn't mention the Scheme he uses in the course. Update I'm still digging into the original question (investigating options such as Petit Scheme suggested by Eli below), but found an interesting link relating to Gholoum's work, so I am including it here. [Ikarus Scheme](http://en.wikipedia.org/wiki/Ikarus_(Scheme_implementation)) is the actual implementation of Ghuloum's ideas, and appears to have been part of his Ph.D. work. It's supposed to be one of the first implementations of R6RS. I'm trying to install Ikarus now, but the configure script doesn't want to recognize my system's install of libgmp.so, so my problems are still unresolved. Example The following example seems to work in PLT 2.4.2 running in DrEd using the Pretty Big (require lang/plt-pretty-big) (load "/Users/donaldwakefield/ghuloum/tests/tests-driver.scm") (load "/Users/donaldwakefield/ghuloum/tests/tests-1.1-req.scm") (define (emit-program x) (unless (integer? x) (error "---")) (emit " .text") (emit " .globl scheme_entry") (emit " .type scheme_entry, @function") (emit "scheme_entry:") (emit " movl $~s, %eax" x) (emit " ret") ) Attempting to replace the require directive with #lang scheme results in the error message foo.scm:7:3: expand: unbound identifier in module in: emit which appears to be due to a failure to load tests-driver.scm. Attempting to use #lang r6rs disables the REPL, which I'd really like to use, so I'm going to try to continue with Pretty Big. My thanks to Eli Barzilay for his patient help.

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  • Implications of not forwarding http:// to http://www.

    - by Michael Wilson
    Hi, my company is running IIS and DNN (I'm not a server guy, so color me ignorant), and I've read previous that you should either redirect your .http://www.mydomain to .http://mydomain or Vice Versa. Can anyone give me reasons to do this? (periods "prepended" to remove href) From what I understand, it's because search engines see those as two different 'sites' (Even when visiting one or the other, I can be logged into one but not the other). I also heard it can be a duplicate content problem, which search engines dislike. Just looking for some professional insight, will help me and others. Thanks!

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  • Users being forced to re-login randomly, before session and auth ticket timeout values are reached

    - by Don
    I'm having reports and complaints from my user that they will be using a screen and get kicked back to the login screen immediately on their next request. It doesn't happen all the time but randomly. After looking at the Web server the error that shows up in the application event log is: Event code: 4005 Event message: Forms authentication failed for the request. Reason: The ticket supplied has expired. Everything that I read starts out with people asking about web gardens or load balancing. We are not using either of those. We're a single Windows 2003 (32-bit OS, 64-bit hardware) Server with IIS6. This is the only website on this server too. This behavior does not generate any application exceptions or visible issues to the user. They just get booted back to the login screen and are forced to login. As you can imagine this is extremely annoying and counter-productive for our users. Here's what I have set in my web.config for the application in the root: <authentication mode="Forms"> <forms name=".TcaNet" protection="All" timeout="40" loginUrl="~/Login.aspx" defaultUrl="~/MyHome.aspx" path="/" slidingExpiration="true" requireSSL="false" /> </authentication> I have also read that if you have some locations setup that no longer exist or are bogus you could have issues. My path attributes are all valid directories so that shouldn't be the problem: <location path="js"> <system.web> <authorization> <allow users="*" /> </authorization> </system.web> </location> <location path="images"> <system.web> <authorization> <allow users="*" /> </authorization> </system.web> </location> <location path="anon"> <system.web> <authorization> <allow users="*" /> </authorization> </system.web> </location> <location path="App_Themes"> <system.web> <authorization> <allow users="*" /> </authorization> </system.web> </location> <location path="NonSSL"> <system.web> <authorization> <allow users="*" /> </authorization> </system.web> </location> The only thing I'm not clear on is if my timeout value in the forms property for the auth ticket has to be the same as my session timeout value (defined in the app's configuration in IIS). I've read some things that say you should have the authentication timeout shorter (40) than the session timeout (45) to avoid possible complications. Either way we have users that get kicked to the login screen a minute or two after their last action. So the session definitely should not be expiring. Update 2/23/09: I've since set the session timeout and authentication ticket timeout values to both be 45 and the problem still seems to be happening. The only other web.config in the application is in 1 virtual directory that hosts Community Server. That web.config's authentication settings are as follows: <authentication mode="Forms"> <forms name=".TcaNet" protection="All" timeout="40" loginUrl="~/Login.aspx" defaultUrl="~/MyHome.aspx" path="/" slidingExpiration="true" requireSSL="true" /> </authentication> And while I don't believe it applies unless you're in a web garden, I have both of the machine key values set in both web.config files to be the same (removed for convenience): <machineKey validationKey="<MYVALIDATIONKEYHERE>" decryptionKey="<MYDECRYPTIONKEYHERE>" validation="SHA1" /> <machineKey validationKey="<MYVALIDATIONKEYHERE>" decryptionKey="<MYDECRYPTIONKEYHERE>" validation="SHA1"/> Any help with this would be greatly appreciated. This seems to be one of those problems that yields a ton of Google results, none of which seem to be fitting into my situation so far.

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  • Retrieve Google Calendar Events

    - by Don
    Hi, I'm using the Java API for Google Calendar. The documents show the following example of how to retrieve events from a calendar: URL feedUrl = new URL("http://www.google.com/calendar/feeds/[email protected]/private/full"); CalendarService myService = new CalendarService("exampleCo-exampleApp-1"); myService.setUserCredentials("[email protected]", "mypassword"); // Send the request and receive the response: CalendarEventFeed myFeed = myService.getFeed(feedUrl, CalendarEventFeed.class); This will retrieve all events from the primary calendar of the [email protected] account. However, I need to retrieve events from a secondary calendar. I already have a reference the CalendarEntry object that represents the secondary calendar, but I still can't figure out how to get events from it. I suspect I can do this using the same code as above, but I just need to change the URL to something else. Thanks, Donal

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  • Getting my head around the practical applications of strong and weak pointers in Objective-C

    - by Chris Wilson
    I've just read the accepted excellent answer to this question that clarifies the conceptual differences between strong and weak pointers in Objective-C, and I'm still trying to understand the practical differences. I come from a C++ background where these concepts don't exist, and I'm having trouble figuring out where I would use one vs the other. Could someone please provide a practical example, using Objective-C code, that illustrates the different uses of strong and weak pointers?

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  • delay JQuery effects

    - by Don
    I want to fade out an element and all its child elements after a delay of a few seconds. but I haven't found a way to specify that an effect should start after a specified time delay.

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