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  • Dynamic, reflective SignalHandler in Java

    - by pilcrow
    How do I install signal handling logic iff sun.misc.Signal is available? Background First generation of my code looked something like this: class MyApp { public static void main(String[] args) { ... Signal.handle(term_sig, new SignalHandler() { public void handle(Signal sig) { ... } }); ... } } I believe I understand how to reflectively test for and use signal handlers -- Class.forName("sun.misc.Signal"), reflectively call Signal.handle, and so forth. My impulse was simply to instantiate another anonymous inner class with the dynamically obtained SignalHandler class, but I think that's just wishful syntax.

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  • Create a link to delete membership in web2py

    - by user1741325
    I'm trying to do something really simple but it's taking me ages to figure out how to do it properly. I want to have a button that simply deletes a member from a group. So in my view I have <div id="del-role">{{=A('Delete Role',_class="btn btn-danger", callback=URL('test'),delete='#del-role')}}</div> However, when I click the button, the only thing I get is a Javascript prompt asking whether I'm sure I want to delete the specified object, yes/no. That's fine but, what I'd really like to do is just auth.del_membership('role') What needs to go in my controller? I do not want any page redirection, I just want to auth.del_membership(role) This seemingly simple thing is taking me forever to understand. Thanks!

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  • Redirecting part of URL in Nginx

    - by Maca
    Trying to move my blog to a new site and I want to redirect some urls. I use nginx. https://blogurl.com/news/2014-08-19/post-3451/mt-preview-33e2742af1eb.php The /news/2014-08-19/post-3451/mt-preview-33e2742af1eb.php part would be always moving. Redirect to below: https://blogurl.com/content/news/2014-08-19/post-3451/mt-preview-33e2742af1eb.php I basically want to insert /content/ after https://blogurl.com and so far I have rewrite ^(.*)$ /content/ break; But my issue is my CMS sits on the same directory level https://blogurl.com/mt/admin and if I simply apply the rewrite above my CMS address would move too. How could I prevent this.

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  • How to persist and load an object which conforms to NSCoding protocol?

    - by mystify
    I have made an class which conforms to the NSCoding protocol and does all the encode and decode stuff. For my app, I simply want to persist an object from that class to the device and the next time when the app launches, I want to load that object back into memory. Basically it's just an class which holds some user input information. For example the user starts writing a text but then quits the app. Next time I want to load that data object. I guess I need NSKeyedArchiver? Is there a good tutorial on this? How do I do that?

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  • Retrieving content of a txt file from URL to Android

    - by eightx2
    I would like to be able to retrieve contents of a .txt file from the internet, and load it in an EditText. I tried using the code on this page: Reading Text File From Server on Android It didn't work, as you might have guessed. I've read on numerous sites about this type of problem, but I can't get anything to work. Someone suggested AndroidHttpClient (http://developer.android.com/reference/android/net/http/AndroidHttpClient.html), but I simply can't find any examples with this. As I'm a newbie in Android programming, I would love if someone could please give me a small example.

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  • Tips about a good class-structure for website? (php)

    - by Martti Laine
    Hello I'm creating a kind of massive network for users to register and login. I want to try using classes, but I've never used them (expect some mysql-wrappers etc). Could you provide some tips and sample-structure for my project? The idea is to simply have a index.php, which prints the whole page and does all the action. Index.php calls functions from classes inside other files. I need: user-class for checking if logged in and retrieving user-info different kind of "page"-classes for functions needed in those pages I'm not asking for full code, but just a start. I don't know, how to use public functions or anything like that. How to wrap these classes to work together? So no functions, just the structure! Martti Laine

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  • Possible loss of precision / [type] cannot be dereferenced

    - by Samuel
    I have been looking around a lot but i simply can't find a nice solution to this... Point mouse = MouseInfo.getPointerInfo().getLocation(); int dx = (BULLET_SPEED*Math.abs(x - mouse.getX()))/ (Math.abs(y - mouse.getY()) + Math.abs(x - mouse.getX()))* (x - mouse.getX())/Math.abs(x - mouse.getX()); In this constellation i get: Possible loss of precision, when i change e.g (x - mouse.getX()) to (x - mouse.getX()).doubleValue() it says double cannot be dereferenced, when i add intValue() somewhere it says int cannot be dereferenced. What's my mistake? [x, y are integers | BULLET_SPEED is a static final int] Thanks!

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  • Netbeans 7.2 not starting

    - by Buddhika Ariyaratne
    I recently installed Netbeans 7.2 beta and it worked fine. Then I installed Netbeans 7.2 final release on top of beta and during the installation, Netbeans 7.1 and Netbeans 7.12 were there. Now when I launch Netbeans, it does not go beyond "loading modules" stage. Simply the Netbeans screen disappear few seconds after the launch. Then I did the following. Uninstalled all the Netbeans versions and re-installed Netbeans 7.2 Deleted AppData/Netbeans folder Deleted User/.nbi folder Searched the registry and deleted Netbeans related entries. (But only one entry was found) Deleted Netbeans Folder in Program Files folder. Uninstalled and Re-installed in a separate drive. Uninstalled and Re-installed under another user account. None of the above worked, the only thing I did not try was to re-install the Windows XP operating system. It there any option to try before re-installing the operating system?

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  • SQL Time(2) to Array in C#?

    - by Jacob Huggart
    Hello all, I am using ASP MVC and SQL Server and I have a database that is updated intermittently with expected wait times for some event. Also, I am using some ajax and jquery. I need to display the average and maximum wait times. How can I take the entire list of time from the server and get the average time? Also, what would be the best method to simply grab a new time from the server when it is updated without having to pull the whole list again? Thanks!

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  • Setting up separate ctags db's for C/C++ standard libs, boost, and third party libs

    - by Robert S. Barnes
    I want to set up separate ctags databases for various libraries in /usr/include/ for use with OmniCppComplete. The idea is to be able to pull in only the libraries needed for a particular project in the target language - C or C++. For example, I'd like to have one database for the standard C libraries, one for system libraries that might be used by either C or C++ programs ( sockets / networking comes to mind ) one for the standard C++ libs / STL / Boost, and then other databases for various third party libraries such as QT or glib. Then I could pull something in simply by typing set tags+= ~/.vim/somelib.tags in vim. I assume that everything related to the C++ stdlib and STL are in the /usr/include/c++ and that Boost is all in /usr/include/boost. Unfortunately it seems that the standard C libs and system libs are just kind of dumped directly into /usr/include/ with a variety of other stuff. How can I get a list of which files and directories belong to which libs? I'm on Ubuntu 8.04.

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  • What is the use of reflection in Java/C# etc

    - by zengr
    I was just curious, why should we use reflection in the first place? // Without reflection Foo foo = new Foo(); foo.hello(); // With reflection Class cls = Class.forName("Foo"); Object foo = cls.newInstance(); Method method = cls.getMethod("hello", null); method.invoke(foo, null); We can simply create an object and call the class's method, but why do the same using forName, newInstance and getMthod functions? To make everything dynamic?

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  • Can a MAC address be used as a reliable part of a rights management (DRM) scheme?

    - by Jarrod Mosen
    We're currently writing some software that we want to protect. We thought that registering a user's MAC address in a database upon activation of the software seemed viable; we can profile and grab that with a Java applet, (is there a better way?) so getting it isn't too much of a problem. However, we want their computer to only run the application, and download application files/updates from the server when their MAC address has been verified with their one on-file. We understand that this means a lockdown to one computer, but special changes can be made on request. What would be the best way to verify their MAC address, to see if it exists in the database, and then serve them the files to run the application? (And to simply run it on subsequent requests, to prevent re-downloading.)

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  • onbeforeunload dilemma: iframe breaking vs. annoying message on refresh/back buttons click

    - by Tossapol
    I'm implementing a search service called SearchInsideOut. http://bit.ly/97SFyW This search service simply replaces web page results by full web pages (Yes, I used iframe). The problem I have to deal with is iframe-breaking pages. The promising solution I found is using onbeforeunload to let users decide whether to stay or leave my site. But this also creates another annoying behavior. When users click other links in my site, onbeforeunload will also be triggered. Fortunately, I could solve this case by placing window.onbeforeunload=null in the onclick event of those links of my site. Unfortunately, I have no idea how to detect external events like clicking "refresh/back" buttons. What should I do to solve this difficulty? All suggestions and comments are highly appreciated.

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  • Entity Framework 5 not updating navigation properties in both entities

    - by Taylor
    I have updated a project to use the new Entity framework shipped with VS2012, however I have run into some of my code throwing exceptions. In the VS10 version of EF I was able to create or modify and Entity and use its navigation properties before calling SaveChanges() For example: A Navigation property of a client having a collection of Invoices. Client c = new Client(); Invoice I = new Invoice(); c.Invoices.Add(I); I would then be able to use Invoice.Client somewhere in my code before actually saving it without issue. Now Invoice.Client == null. Similarly in setting I.Client = C, I does not show up under C.Invoices What am I missing here or is this just simply how EF5 is?

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  • Address of instruction causing SIGSEGV in external program

    - by karramba
    I want to get address of instruction that causes external program to SIGSEGV. I tried using ptrace for this, but I'm getting EIP from kernel space (probably default signal handler?). How GDB is able to get the correct EIP? Is there a way to make GDB provide this information using some API? edit: I don't have sources of the program, only binary executable. I need automation, so I can't simply use "run", "info registers" in GDB. I want to implement "info registers" in my own mini-debugger :)

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  • BeanUtils getPropertyOfMapBean

    - by dx-cp
    Hi, Im wondering if it is possible to get data from property which is map cotaining pairs Key-StringArray (Map) in BeanUtils library. I just simply need to access one of array elements by calling propertyName=string[0]. Current version (1.8.3) does not support indexed properties. If you look into their code you will find in class PropertyUtilsBean in method getPropertyOfMapBean: if (resolver.isIndexed(propertyName) || resolver.isMapped(propertyName)) { throw new IllegalArgumentException( "Indexed or mapped properties are not supported on" + " objects of type Map: " + propertyName); } way too bad:-( Have any of you any tip how to do it somehow differently?

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  • Code Golf: All +-*/ Combinations for 3 integers

    - by Flash84x
    Write a program that takes 3 integers separated by spaces and perform every single combination of addition, subtraction, multiplication and division operations possible and display the result with the operation combination used. Example: $./solution 1 2 3 Results in the following output 1+2+3 = 6 1-2-3 = -4 1*2*3 = 6 1/2/3 = 0 (integer answers only, round up at .5) 1*2-3 = -1 3*1+2 = 5 etc... Order of operation rules apply, assume there will be no parenthesis used i.e. (3-1)*2 = 4 is not a combination, although you could implement this for "extra credit" For results where a divide by 0 occurs simply return NaN

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  • Question regarding the use of iframes in Safari and Chrome's startup pages

    - by Wesley
    If you have ever used a new release of either Chrome or Safari, you know that when you add a new tab, the default screen is a grid like setup with your most favorite links sitting there waiting to be clicked on. What makes it even nicer is the graphical interface, with actual pictures of the websites they are representing. I am looking to do something similar, how is it done? Are they simply iframes? iframes set with css? If anyone has any knowledge about the actual implementation of this seemingly simple festure, please share!! Thanks

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  • Sort database entries via a dropdown list

    - by Lin
    Hello! I'm curious if anyone could possibly help me, because I can't find anything exactly related to it anywhere, and it's driving me nuts. I'd like to have a dropdown list on a page, that will give the visitor the option to sort all entries by year. I have entries from i.e. 2001, 2005, 2009, 2010. The years should be displayed in the dropdown, so the visitor can easily just select all entries dated 2001 if they want. The year for each entry is located in the one database table I have. In other words, I simply want a "sort by" dropdown that you can see on pretty much any shopping site nowadays. But with set years. Thanks in advance for any replies!

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  • better for-loop syntax for detecting empty sequences?

    - by Dmitry Beransky
    Hi, Is there a better way to write the following: row_counter = 0 for item in iterable_sequence: # do stuff with the item counter += 1 if not row_counter: # handle the empty-sequence-case Please keep in mind that I can't use len(iterable_sequence) because 1) not all sequences have known lengths; 2) in some cases calling len() may trigger loading of the sequence's items into memory (as the case would be with sql query results). The reason I ask is that I'm simply curious if there is a way to make above more concise and idiomatic. What I'm looking for is along the lines of: for item in sequence: #process item *else*: #handle the empty sequence case (assuming "else" here worked only on empty sequences, which I know it doesn't)

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  • IIS Not working

    - by 3bd
    I have a web site that built on Visual studio 2008 and i need to run it from my computer (Win 7 Ultimate) as a server I tried to publish it to IIS and this is simply not working and i have the flowing error : Error Summary HTTP Error 500.19 - Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid. Config Error This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false". any one can help?

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  • JS DOM: Get elements by text content.

    - by hristo
    Hello! I am looking for a way to perform fulltext search on the DOM tree with JS. In two words, I would like to retrieve the list of text nodes which contain a given string. I've tried mootools' Element.getElements ( ':contains[string]' ) but I can't get it to work with strings containing whitespace. I'm thinking about simply indexing all text nodes and checking against each node for the string being searched for, but, in my project, there's no way of telling when the DOM updates in order to maintain such an index up-to-date. Any better ideas? Thanks

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  • Bug Tracker - Feature set - Comparison

    - by Blankman
    Hi, I have installed and played around with a few bug tracking apps, and just wanted to get some feedback and features that a typical (or not so typical) bug tracking software has. I want to make sure I am not overlooking a feature that might come in handy. So the biggest idea is around a bug, which is associated with: Bugs - product - product version - component (specific component of the product) - status - priority - assigned to - expected time to finish - time spent on it so far - created by - historical log of bug Forums Wiki I guess the above functionality is common to all, so what exactly differentiates them? Is it simply the UI and filtering/searching that you base a decision on? (I am comparing something like Jira with FogBugz)

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  • Maximum number of files in one ext3 directory while still getting acceptable performance?

    - by knorv
    I have an application writing to an ext3 directory which over time has grown to roughly three million files. Needless to say, reading the file listing of this directory is unbearably slow. I don't blame ext3. The proper solution would have been to let the application code write to sub-directories such as ./a/b/c/abc.ext rather than using only ./abc.ext. I'm changing to such a sub-directory structure and my question is simply: roughly how many files should I expect to store in one ext3 directory while still getting acceptable performance? What's your experience? Or in other words; assuming that I need to store three million files in the structure, how many levels deep should the ./a/b/c/abc.ext structure be? Obviously this is a question that cannot be answered exactly, but I'm looking for a ball park estimate.

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  • Replacing a C++ ActiveX component with a .NET implementation?

    - by Leon Breedt
    I have existing managed and unmanaged software using an ActiveX component supplied by a third party to perform some communications, but it is now required that this communication be routed through my application. Ideally I'd be able to install a .NET component which will expose exactly the same interface, and will be usable as a drop-in replacement. However, I am running into the limits of my understanding of COM, which admittedly is quite minimal. How best to ensure that my implementation of the interface is 100% binary compatible with the existing object? How do I ensure that applications use my implementation of the interface instead of the legacy implementation? Is it simply a matter of registering my implementation, and unregistering the legacy one? How do I ensure it's a "drop-in" replacement, and requires no changes to existing software? How do I ensure unmanaged code can use it without issue? Note: I am able to require that .NET 4.0 be used, if that will make things simpler.

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