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  • How to check if a given Regex is valid?

    - by Philipp Andre
    Hi folks, I have a little program allowing users to type-in some regular expressions. afterwards i like to check if this input is a valid regex or not. I'm wondering if there is a build-in method in Java, but could not find such jet. Can you give me some advice? Best regards Phil

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  • Load list of image from folder

    - by marc-andre menard
    I have a folder of images, from 10 to 200, a webpage, a jquery fade and a php script that read folder full of images Is there any way to make the php script scan a folder, get a list of image (in an array ?) and pass it to jquery script ? (first question) Now, i can make a xml file from the result php list of files found or make a html <li> from the list in the html. is there ANY other way to do that ? (question #2)

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  • why does an event handler never gets called if its added within a loop on an ienumerable

    - by André Carvalho
    For instance: IEnumerable<MyType> list = someCollection.Select(i => new MyType(i)); foreach (var item in list) item.PropertyChanged += item_PropertyChanged; <-- this never gets called Bu if list is assigned like list = someCollection.Select(i => new MyType(i)).ToArray(); the event handler does get called.. Why? (i imagine it has something to do with the fact that a linq query is lazy, but the fact of looping through the result isn't enough??)

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  • Problems with LWUIT in J2ME on Nokia E72

    - by Andre Mariano
    Well, I'm developing a app in my cellphone that is going to connect to my PC, the problem is that everytime that I return a URLRequest to the cellphone, it shows the previous Form on the screen and not de actual one, for example this is what goes in my actionListener: public void actionPerformed(ActionEvent ae) { if (ae.getCommand() == guiaUtil.cSelecionar()) { LoginRemote loginRemote = new LoginRemote(); try { //This is the request, returns true or false, does not affect the form loginRemote.login(tLogin.getText(), tPassword.getText()); } catch (Exception e) { GuiaUtil.error(e); return; } guiaUtil.mainApp().startMenu(); } } Then in the "guiaUtil.mainApp().startMenu()" I have this public void startMenu() { if (itemsMenu == null) { itemsMenu = new List(); itemsMenu.setWidth(320); itemsMenu.addItem("Sincronize Spots"); itemsMenu.addItem("Find Spots"); itemsMenu.addItem("Work"); itemsMenu.setFocus(true); this.addComponent(itemsMenu); this.addCommandListener(this); this.addCommand(guiaUtil.cSelect()); Form form = new Form(); form.addComponent(itemsMenu); } form.show(); } Anyway, after the request returns, it shows my Login form again, instead of showing the Menu List

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  • Show UIView for app presentation only once in iOS

    - by André Muniz
    I need to show an UIScrollView with some pages for present the app to user when launched for the first time. My slides are working correctly, lefting the logic to present it. Is a good practice to set the UIScrollViewController as root controller and set a NSUserDefault variable to control the presentation and redirect to main controller or set the main ViewController as root normally and call the presentation view if needed is a better approach? If there is a better way to do this can someone help? Thanks.

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  • REST API - why use PUT DELETE POST GET?

    - by Andre
    So -i was looking through some articles on creating REST API's. And some of them suggest using all types of HTTP requests: like PUT DELETE POST GET. So - we would create for example index.php and write API this way: $method = $_SERVER['REQUEST_METHOD']; $request = split("/", substr(@$_SERVER['PATH_INFO'], 1)); switch ($method) { case 'PUT': ....some put action.... break; case 'POST': ....some post action.... break; case 'GET': ....some get action.... break; case 'DELETE': ....some delete action.... break; } Ok - granted - I don't know much baout web services (yet). But - wouldn't it be easier to just accept JSON object through normal $_POST and then respond in JSON as well. We can easily serialize/deserialize via php's json_encode and json_decode and do whatever we want with that data without having to deal with different HTTP request methods... Am I missing something? UPDATE 1: Ok - after digging through various API's and learning a lot about XML-RPC, JSON-RPC, SOAP, REST I came to a conclusion that this type of API is sound. Actually stack exchange is pretty much using this approach on their sites and I do think that these people know what they are doing Stack Exchange API.

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  • How to invoke a method with a generic return type using reflection

    - by Andre Luus
    Hi there! I'm trying to invoke a method with reflection that has a generic return type, like this: public class SomeClass<T> { public List<T> GetStuff(); } I get an instance of SomeClass with a call to a Repository's GetClass<T> generic method. MethodInfo lGetSomeClassMethodInfo = typeof(IRepository) .GetMethod("GetClass") .MakeGenericMethod(typeof(SomeClass<>); object lSomeClassInstance = lGetSomeClassMethodInfo.Invoke( lRepositoryInstance, null); After that, I this is where I try to invoke the GetStuff method: typeof(SomeClass<>).GetMethod("GetStuff").Invoke(lSomeClassInstance, null) I get an exception about the fact that the method has generic arguments. However, I can't use MakeGenericMethod to resolve the return type. Also, if instead of typeof(SomeClass<>) I use lSomeClassInstance.GetType() (which should have resolved types) GetMethod("GetStuff") returns null! UPDATE I have found the solution and will post the answer shortly.

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  • Code Igniter - URL Rewrite

    - by André Alçada Padez
    Hey, i'm trying to get a project to work, but i am having trouble with the rewrite module. I'm running Wamp over Windows XP. I changed httpd.conf to change the root of localhost to: DocumentRoot "C:/wamp/www/project/docroot/" I have htaccess RewriteEngine On RewriteBase / my Apache has the rewrite module Activated. my base_url() in config.php is 'http://localhost/' in routes.php i have: $route['default_controller'] = "home"; $route['our-recipes'] = "recipes"; and more pairs when i point the browser to http://localhost/ i get the homepage of my site, but when i click on any internal link like to 'our-recipes' it loads but i get the same homepage, with the new url on the location bar. if i try to access 'http://localhost/recipes' i get the same result. this is my folder structure: Can anyone please solve this for me??

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  • Projects with browsable source using dependency injection w/ guice?

    - by André
    I often read about dependency injection and I did research on google and I understand in theory what it can do and how it works, but I'd like to see an actual code base using it (Java/guice would be preferred). Can anyone point me to an open source project, where I can see, how it's really used? I think browsing the code and seeing the whole setup shows me more than the ususal snippets in the introduction articles you find around the web. Thanks in advance!

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  • Printing from a Windows Service

    - by Andre
    Ok, I am trying to print a page from a windows service that I installed using a Visual Studio setup project. At first I set the Account property yo Local System, but it will tell me that there are no printers installed (and there are). So I changed it to user and now it just doesn't print (no error or anything). I did some Googleing and basically it said that "Interact with Desktop" should be enabled. To programatically do this you need to edit the registry settings for this service (which really is second prize). I tried to manually set it on the properties dialog under Services, but then I need to change the Account back to Local System, which brings me back to the "No Printers Installed" problem. Any ideas?

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  • Dependency injection in constructors

    - by andre
    Hello everyone. I'm starting a new project and setting up the base to work on. A few questions have risen and I'll probably be asking quite a few in here, hopefully I'll find some answers. First step is to handle dependencies for objects. I've decided to go with the dependency injection design pattern, to which I'm somewhat new, to handle all of this for the application. When actually coding it I came across a problem. If a class has multiple dependencies and you want to pass on multiple dependencies via the constructor (so that they cannot be changed after you instantiate the object). How do you do it without passing an array of dependencies, using call_user_func_array(), eval() or Reflection? This is what i'm looking for: <?php class DI { public function getClass($classname) { if(!$this->pool[$classname]) { # Load dependencies $deps = $this->loadDependencies($classname); # Here is where the magic should happen $instance = new $classname($dep1, $dep2, $dep3); # Add to pool $this->pool[$classname] = $instance; return $instance; } else { return $this->pool[$classname]; } } } Again, I would like to avoid the most costly methods to call the class. Any other suggestions?

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  • Multiple memcached servers question.

    - by Andre
    hypothetically - if I have multiple memcached servers like this: //PHP $MEMCACHE_SERVERS = array( "10.1.1.1", //web1 "10.1.1.2", //web2 "10.1.1.3", //web3 ); $memcache = new Memcache(); foreach($MEMCACHE_SERVERS as $server){ $memcache->addServer ( $server ); } And then I set data like this: $huge_data_for_frong_page = 'some data blah blah blah'; $memcache->set("huge_data_for_frong_page", $huge_data_for_frong_page); And then I retrieve data like this: $huge_data_for_frong_page = $memcache->get("huge_data_for_frong_page"); When i would to retrieve this data from memcached servers - how would php memcached client know which server to query for this data? Or is memcached client going to query all memcached servers?

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  • REST - why we need million urls and different HTTP request?

    - by Andre
    I asked this question. But I still don't understand why we need to utilize different HTTP requests: DELETE/PUT/POST/GET in order to build nice API Wouldn't it be a lot simpler to pass all information in request parameters and have a SINGLE ENTRY-POINT for your api?: GET www.example.com/api?id=1&method=delete&returnformat=JSON GET www.example.com/api?id=1&method=delete&returnformat=XML or POST www.example.com/api {post data: id=1&method=delete&returnformat=JSON} POST www.example.com/api {post data: id=1&method=delete&returnformat=XML} and then - we can handle all methods and data internally without the need for hundreds of urls... how would you call this type of API - It's not REST apparently, it's not SOAP. then - what is it? UPDATE I'm not proposing any new standards here. I merely asking a question in order to better understand why web services work the way they work.

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  • How to get HTML from external contents with Jquery?

    - by André
    Hi, I have successfully achieved the task of getting an internal webpage to show on my HTML, like I show bellow. click here to see teste1.html $('#target').click(function() { $.get('teste1.html', function(data) { $('#result').html(data); alert('Load was performed.'); }); }); The main goal is to get an external webpage, but this is not working: $.get('http://www.google.com/index.html', function(data) { $('#result').html(data); alert('Load was performed.'); }); I need to get the HTML from an external webpage to read the tags and then output to Json. Some clues on how to achieve this(load external webpages with Jquery, or should I do it with PHP)? Best Regards.

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  • Parenthesis operator in C. What is the effect in the following code

    - by Andre
    Hi everyone, I was playing with a macro to enable/disable traces when I came out with the following code when the macro is disabled: int main { ("Hello world"); } This code is valid and I got the desired effect (nothing happens when the macro is disabled) but I couldn't figure out what exactly is happening. Is the compiler seeing the parenthesis as a "nameless" method declaration? To make it clearer the code is : #ifdef TRACE #define trace printf("%s %d -> ",__FILE__, __LINE__);printf else #define trace #endif int main { trace("Hello world"); } Thanks in advance.

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  • Best way to deallocate an array of array in javascript

    - by andre.dias
    What is the best way to deallocate an array of array in javascript to make sure no memory leaks will happen? var foo = new Array(); foo[0] = new Array(); foo[0][0] = 'bar0'; foo[0][1] = 'bar1'; foo[1] = new Array(); ... delete(foo)? iterate through foo, delete(foo[index]) and delete(foo)? 1 and 2 give me the same result? none?

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  • How to increase query speed without using full-text search?

    - by andre matos
    This is my simple query; By searching selectnothing I'm sure I'll have no hits. SELECT nome_t FROM myTable WHERE nome_t ILIKE '%selectnothing%'; This is the EXPLAIN ANALYZE VERBOSE Seq Scan on myTable (cost=0.00..15259.04 rows=37 width=29) (actual time=2153.061..2153.061 rows=0 loops=1) Output: nome_t Filter: (nome_t ~~* '%selectnothing%'::text) Total runtime: 2153.116 ms myTable has around 350k rows and the table definition is something like: CREATE TABLE myTable ( nome_t text NOT NULL, ) I have an index on nome_t as stated below: CREATE INDEX idx_m_nome_t ON myTable USING btree (nome_t); Although this is clearly a good candidate for Fulltext search I would like to rule that option out for now. This query is meant to be run from a web application and currently it's taking around 2 seconds which is obviously too much; Is there anything I can do, like using other index methods, to improve the speed of this query?

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  • IIS6 access parent folder of the of the app home folder

    - by André Alçada Padez
    Well. i'm really sorry for the fact that this question is easily testable, but i need to plan this for tomorrow and i don't have the means to test it now. I'm willing to lose the reputation if you are willing to help me out. Scenario: i got -iis wwwroot    - domainfolder (DynamicWeb Instalation)         - destinationfolder    - subdomain folder           default.aspx I need to know if i can make a fileupload in my Default.aspx, and do something like: fileUpload.SaveAs(Server.MapPath("../domainfolder/destinationfolder/") + filename) keep in mind that I will have full access to the windows server where the sites are hosted.

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  • jquery fancy box

    - by André Alçada Padez
    Hi, i'm using fancy box for some content editing in my backoffice. I recently added an image manager wich i create with javascript. It's kind of like a fancybox, but i had to do it from scractch for it to be able to overlay the first one. My problem is this: I want to have the user being able to press the escape key to close my manager, but if i use $(window).keypress when i press the esc key, both the boxes close. I have tried $(window).unbind('keypress') when i start loading my box, and i have tried to look through the fancybox js file, but it is minimized. Does anyone know how i can disable and afterwards enable the escape key (during runtime) on the fancybox? Thanx

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  • How to get the height of a DIV considering inner element's margins?

    - by André Pena
    Consider de following markup: <div id="outerElement"> <div id="innerElement" style="border: 1px solid blue; background-color: #f0f3f5; margin-top: 100px"> TESTE </div> </div> I want to get the actual final height of outerElement using javascript. I noticed that if I remove the vertical margins from innerElement I am able to get what I want but I cannot alter styles from within the outerElement. How do I do this? Obs: I already tried height, scrollheight and offsetHeight in all browsers. Chrome gives me the expected value (including inner element's margins) for scrollHeight. All other browsers fail.

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  • Zend Framework Autoloader question.

    - by Andre
    In zend framework I register my namespace like this (in application.php): 'autoloaderNamespaces' => array( 'Cms_' ) And after this - I'd expect that Zend would always check that path in addition to Zend and ZendX paths if unknown class is called. But for some reason this doesn't work with for example view helpers. I still have to register a separate path for my view helpers even though view helper scripts are named according to Zend coding standards and are located in: Cms/View/Helper/ And this is how I register helper path in config file: view' => array( 'charset' => 'UTF-8', 'doctype' => 'XHTML1_TRANSITIONAL', 'helperPath' => array( 'Cms_View_Helper_' => 'Cms/View/Helper' ) ), So - I'm not sure why I have to register "Cms" namespace twice first through 'autoloaderNamespaces' and then through View "helperPath"? Shouldn't Cms namespace include Cms/View/Helper namespace? can someone plz clarify this:)

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