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  • What makes you come back to stackoverflow every day? [closed]

    - by rmarimon
    I know this is not a programming question. Let's try to label it a programming community question so that it doesn't get closed. I've been wondering what makes the programming community so prone to helping others in stackoverflow. Is this something particular to programmers? Do you think lawyers and accountants would help other lawyers and programmers as we do? What makes you come back to stackoverflow every day? It would be great to have an answer per reason so that we can get the list of reasons. In my case, I come to stackoverflow to ask questions that I can't solve quickly, and to test how good I am when answering questions. So far I’ve failed miserably at trying to answer questions but it has helped me understand how little I know.

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  • Invalidating ASP.NET FormsAuthentication server side

    - by Rob Walker
    I am experimenting with FormsAuthentication (using ASP.NET MVC2) and it is working fairly well. However, one case I can't work out how to deal with is validating the user identity on the server to ensure it is still valid from the server's perspective. eg. User logs in ... gets a cookie/ticket Out of band the user is deleted on the server side User makes a new request to the server. HttpContext.User.Identity.Name is set to the deleted user. I can detect this fine, but what is the correct way to handle it? Calling FormsAuthentication.SignOut in the OnAuthorization on OnActionExecuting events is too late to affect the current request. Alternatively I would like to be able to calls FormsAuthentication.InvalidateUser(...) when the user is deleted (or database recreated) to invalidate all tickets for a given (or all) users. But I can't find an API to do this.

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  • Drupal: Create custom search

    - by Dr. Hfuhruhurr
    I'm trying to create a custom search but getting stuck. What I want is to have a dropdownbox so the user can choose where to search in. These options can mean 1 or more content types. So if he chooses options A, then the search will look in node-type P,Q,R. But he may not give those results, but only the uid's which will be then themed to gather specific data for that user. To make it a little bit clearer, Suppose I want to llok for people. The what I'm searching in is 2 content profile types. But ofcourse you dont want to display those as a result, but a nice picture of the user and some data. I started with creating a form with a textfield and the dropdown box. Then, in the submit handler, i created the keys and redirected to another pages with those keys as a tail. This page has been defined in the menu hook, just like how search does it. After that I want to call hook_view to do the actual search by calling node_search, and give back the results. Unfortunately, it goes wrong. When i click the Search button, it gives me a 404. But am I on the right track? Is this the way to create a custom search? Thx for your help. Here's the code for some clarity: <?php // $Id$ /* * @file * Searches on Project, Person, Portfolio or Group. */ /** * returns an array of menu items * @return array of menu items */ function vm_search_menu() { $subjects = _vm_search_get_subjects(); foreach ($subjects as $name => $description) { $items['zoek/'. $name .'/%menu_tail'] = array( 'page callback' => 'vm_search_view', 'page arguments' => array($name), 'type' => MENU_LOCAL_TASK, ); } return $items; } /** * create a block to put the form into. * @param $op * @param $delta * @param $edit * @return mixed */ function vm_search_block($op = 'list', $delta = 0, $edit = array()) { switch ($op) { case 'list': $blocks[0]['info'] = t('Algemene zoek'); return $blocks; case 'view': if (0 == $delta) { $block['subject'] = t(''); $block['content'] = drupal_get_form('vm_search_general_form'); } return $block; } } /** * Define the form. */ function vm_search_general_form() { $subjects = _vm_search_get_subjects(); foreach ($subjects as $key => $subject) { $options[$key] = $subject['desc']; } $form['subjects'] = array( '#type' => 'select', '#options' => $options, '#required' => TRUE, ); $form['keys'] = array( '#type' => 'textfield', '#required' => TRUE, ); $form['submit'] = array( '#type' => 'submit', '#value' => t('Zoek'), ); return $form; } function vm_search_general_form_submit($form, &$form_state) { $subjects = _vm_search_get_subjects(); $keys = $form_state['values']['keys']; //the search keys //the content types to search in $keys .= ' type:' . implode(',', $subjects[$form_state['values']['subjects']]['types']); //redirect to the page, where vm_search_view will handle the actual search $form_state['redirect'] = 'zoek/'. $form_state['values']['subjects'] .'/'. $keys; } /** * Menu callback; presents the search results. */ function vm_search_view($type = 'node') { // Search form submits with POST but redirects to GET. This way we can keep // the search query URL clean as a whistle: // search/type/keyword+keyword if (!isset($_POST['form_id'])) { if ($type == '') { // Note: search/node can not be a default tab because it would take on the // path of its parent (search). It would prevent remembering keywords when // switching tabs. This is why we drupal_goto to it from the parent instead. drupal_goto($front_page); } $keys = search_get_keys(); // Only perform search if there is non-whitespace search term: $results = ''; if (trim($keys)) { // Log the search keys: watchdog('vm_search', '%keys (@type).', array('%keys' => $keys, '@type' => $type)); // Collect the search results: $results = node_search('search', $type); if ($results) { $results = theme('box', t('Zoek resultaten'), $results); } else { $results = theme('box', t('Je zoek heeft geen resultaten opgeleverd.')); } } } return $results; } /** * returns array where to look for * @return array */ function _vm_search_get_subjects() { $subjects['opdracht'] = array('desc' => t('Opdracht'), 'types' => array('project') ); $subjects['persoon'] = array('desc' => t('Persoon'), 'types' => array('types_specialisatie', 'smaak_en_interesses') ); $subjects['groep'] = array('desc' => t('Groep'), 'types' => array('Villamedia_groep') ); $subjects['portfolio'] = array('desc' => t('Portfolio'), 'types' => array('artikel') ); return $subjects; }

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  • javascript eval backslash in window NT path problem

    - by Hammad Tariq
    I am experiencing a classic JS case (in my opinion) but after a lot of googling, still not able to find a solution. Backslash is considered as a escape character in JS but what you need when you need to pass windows path from the JS and print it? I am using eval because my java applet is executing the code and placing bits when it has a string to evaluate. That's why eval is necessary, however I have made an example which is below: <div id="mainTabs"></div> <script> var s = "document.getElementById('mainTabs').innerHTML='\\C\ganye\file.doc'"; eval(s); </script> I tried double backslashes, not working, if anyone could help me get around this with as less hassle as possible, I will feel grateful.

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  • connect to web API from ..NET

    - by Saif Khan
    How can I access and consume a web API from .NET? The API is not a .NET API. Here is sample code I have in Ruby require 'uri' require 'net/http' url = URI.parse("http://account.codebasehq.com/widgets/tickets") req = Net::HTTP::Post.new(url.path) req.basic_auth('dave', '6b2579a03c2e8825a5fd0a9b4390d15571f3674d') req.add_field('Content-type', 'application/xml') req.add_field('Accept', 'application/xml') xml = "<ticket><summary>My Example Ticket</summary><status-id>1234</status-id><priority-id>1234</priority-id><ticket-type>bug</ticket-type></ticket>" res = Net::HTTP.new(url.host, url.port).start {|http| http.request(req, xml)} case res when Net::HTTPCreated puts "Record was created successfully." else puts "An error occurred while adding this record" end Where can I find information on consuming API like this from .NET? I am aware how to use .NET webservices.

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  • C++: Dependency injection, circular dependency and callbacks

    - by Jonathan
    Consider the (highly simplified) following case: class Dispatcher { public: receive() {/*implementation*/}; // callback } class CommInterface { public: send() = 0; // call } class CommA : public CommInterface { public: send() {/*implementation*/}; } Various classes in the system send messages via the dispatcher. The dispatcher uses a comm to send. Once an answer is returned, the comm relays it back to the dispatcher which dispatches it back to the appropriate original sender. Comm is polymorphic and which implementation to choose can be read from a settings file. Dispatcher has a dependency on the comm in order to send. Comm has a dependency on dispatcher in order to callback. Therefor there's a circular dependency here and I can't seem to implement the dependency injection principle (even after encountering this nice blog post).

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  • Time to ignore IDisposable?

    - by Mystagogue
    Certainly we should call Dipose() on IDisposable objects as soon as we don't need them (which is often merely the scope of a "using" statement). If we don't take that precaution then bad things, from subtle to show-stopping, might happen. But what about "the last moment" before process termination? If your IDisposables have not been explicitly disposed by that point in time, isn't it true that it no longer matters? I ask because unmanaged resources, beneath the CLR, are represented by kernel objects - and the win32 process termination will free all unmanaged resources / kernel objects anyway. Said differently, no resources will remain "leaked" after the process terminates (regardless if Dispose() was called on lingering IDisposables). Can anyone think of a case where process termination would still leave a leaked resource, simply because Dispose() was not explicitly called on one or more IDisposables? Please do not misunderstand this question: I am not trying to justify ignoring IDisposables. The question is just technical-theoretical.

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  • Swipe gestures on Android ListView items

    - by Bartek
    I have a ListView populated by a ResourceCursorAdapter. I use the loaders mechanism to query a ContentProvider for list items. I detect swipe gestures on the list items to perform some actions on them. New items get added by a background service, so the list can change dynamically. Everything works fine, except when I start swiping and a database change occurs (as a result of the background service adding a new row). In such case the gesture is not detected properly. I noticed that ACTION_CANCEL is dispatched to the list item view and also that bindView is executed for all visible items. Inside the bindView method I only set some text - I don't change any listeners there. How can I make gestures work even when new items are being added by the background service? Perhaps there's a way to prevent the motion from being cancelled or I can pause database updates so they don't interrupt the gesture.

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  • Why can't the JVM just make autoboxing "just work"?

    - by Pyrolistical
    Autoboxing is rather scary. While I fully understand the difference between == and .equals I can't but help have the follow bug the hell out of me: final List<Integer> foo = Arrays.asList(1, 1000); final List<Integer> bar = Arrays.asList(1, 1000); System.out.println(foo.get(0) == bar.get(0)); System.out.println(foo.get(1) == bar.get(1)); That prints true false Why did they do it this way? It something to do with cached Integers, but if that is the case why don't they just cache all Integers used by the program? Or why doesn't the JVM always auto unbox to primitive? Printing false false or true true would have been way better.

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  • How to Track F5/Refresh in ASP.Net

    - by Everest
    I am using VS 2005, C# 2, ASP.Net 2.0 I am unable to find out how to track that user pressed F5/Ctrl+F5/ Open a new Window(Ctrl + N) in ASP.Net. I know that there is a Page.IsPostBack property, which tells that a page is loaded in response to an action taken by user. I am just curious to know, that why isn't there a property as IsRefresh or Page.IsRefresh in ASP.Net, which will return true, whenever user takes any of the above actions. Is there a way to know this? Actually my problem is that i have a DLL using which all of my aspx pages are inherited, I have to insert some values in a table whenever the page is opened for the first time that's it, if user just opens the page or do not take any action, an entry should be inserted into the database, but as far as I have tried, I controlled it anyhow using the Page.IsPostBack property, but I got stuck in the refresh case, as it is inserting records unconditionally.

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  • Delphi overwrite existing file on save dialog

    - by AfterImage
    Hello everyone, I am using the TSaveDialog component to save a file from a button click. However, I am having trouble with saving on an existing file name. Generally, when you want to save over an existing file in Windows, a message box pops up asking you if you really want to overwrite the file. This is not the case with the TSaveDialog component and it will go ahead and write over the file without asking. I was hoping there was a TSaveDialog function or event that I could use but I have not seen anything that looks like it handles this. So it could be that I simplely haven't found the correct method to use. If there is an event, I could use if FileExists(saveDialog.FileName) then //and so forth but the events TSaveDialog has are OnCanClose, OnClose, OnFolderChange, OnIncludeItem, OnSelectionChange, OnShow, OnTypeChange... My question is, how do I pop up a message box to ask the user if they want to overwrite the existing file using the TSaveDialog component. Thanks.

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  • GpsSatellite.getSnr() - What is the value range?

    - by rflexor
    I'm building a Sat-View that draws a small bar-chart for available satellites and their signal strength (or better: their signal-to-noise-ratio / SNR). The javadoc doesn't say what value-range to expect for the SNR. The NMEA-Standard says 0-99, but even in best conditions my G1 doesn't reach that value. I also read that different manufacturers use different value-ranges for the SNR, so is that true for android-devices, too? Or is there a unified value range on that plattform and if so, what is it? The lack of information in the docs leads me to suspect I just get the "raw" SNR from the driver, in which case I'd like to know: What do you think is the best approach to visualize that unknown value-range in a bar-chart?

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  • Can YQL parse web sites requiring cookie-based authentication?

    - by user249488
    First, my use case: I'm trying to use YQL's built in XPATH capabilities to scrape content from Yahoo! Fantasy Sports. It uses some sort of cookie-based authentication scheme. Basically, the sequence is: 1) Do an HTTP GET on the Yahoo! Login page 2) Parse the hidden inputs from the response and do an HTTP PUT with your Yahoo! Login on the form URL 3) Use the cookies returned from step 2 to GET any of the Fantasy Sports! websites that you have access to My question is, does YQL support doing this to scrape data? The only authentication based examples I've seen use OAuth, but I haven't seen any examples of using YQL to parse websites with cookie-based authentication schemes

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  • Are there any real benefits to including javascript dynamically rather than as script tags at the bo

    - by SB
    I've read that including the scripts dynamically may provide some better performance, however i'm not really seeing that on the small local tests I'm doing. I created a jquery plugin to dynamically load other plugins as necessary and am curious as to if this is actually a good idea. The following would be called onready or at the bottom of the page(I can provide the source for the plugin if anyone is interested): $.fn.executePlugin( 'qtip', // looks in default folder { required: '/javascript/plugin/easing.js', // not really required for qtip just testing it version: 1, //used for versioning and caching checkelement: '#thumbnail', // will not include plugin if $(element).length==0 css: 'page.css', // include this css file as well with plugin cache:true, // $.ajax will use cache:true success:function() { // success function to be called after the plugin loads - apply qtip to an element $('#thumbnail').qtip( { content: 'Some basic content for the tooltip', // Give it some content, in this case a simple string style: {name:'cream'}, }); } });

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  • Is it possible to disable a ScrollViewer from inside the ScrollViewer?

    - by gehho
    From a UserControl, I would like to disable a ScrollViewer which is defined one level higher. My scenario looks something like this: <!-- ... --> <ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled"> <custom:MyUserControl ... /> </ScrollViewer> Now, I would like to disable the ScrollViewer from within MyUserControl. Is this possible? Background: I have defined a custom TabControl style where I added a ScrollViewer for each item's content automatically. However, in one case, I do not want to use that ScrollViewer, but rather make the content size to the available space, whereas in all other cases I do want to use the ScrollViewer. Any ideas? Of course, I could add a ScrollViewer to every tab item manually, except for the one item, but that is not what I want.

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  • Using a member function with QScriptEngine::newFunction

    - by Rohan Prabhu
    Hey all, Let's take the case of a simple class: QScriptEngine engine; class MyClass { public: QScriptValue foo(QScriptContext*, QScriptEngine*); MyClass(); }; QScriptValue MyClass:foo(QScriptContext* context, QScriptEngine* eng) { //something } MyClass::MyClass() { QScriptValue self = engine.newFunction(this->foo, 0); .... } The above function gives me an error: no matching function for call to ‘QScriptEngine::newFunction(<unresolved overloaded function type>, int)’ I have tried using engine.newFunction(reinterpret_cast<FunctionSignature>(foo), 0); but this gives me an error which basically says that the compiler is not aware of a keyword called 'FunctionSignature'. Any help is appreciated. Thanks a lot. Regards, rohan

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  • Convert Chunk of Data into Tabular Format Using Perl

    - by neversaint
    I have a data that looks like this 1:SRX000566 Submitter: WoldLab Study: RNASeq expression profiling for ENCODE project(SRP000228) Sample: Human cell line GM12878(SRS000567) Instrument: Solexa 1G Genome Analyzer Total: 4 runs, 62.7M spots, 2.1G bases Run #1: SRR002055, 11373440 spots, 375323520 bases Run #2: SRR002063, 22995209 spots, 758841897 bases Run #3: SRR005091, 13934766 spots, 459847278 bases Run #4: SRR005096, 14370900 spots, 474239700 bases 2:SRX000565 Submitter: WoldLab Study: RNASeq expression profiling for ENCODE project(SRP000228) Sample: Human cell line GM12878(SRS000567) Instrument: Solexa 1G Genome Analyzer Total: 3 runs, 51.2M spots, 1.7G bases Run #1: SRR002052, 12607931 spots, 416061723 bases Run #2: SRR002054, 12880281 spots, 425049273 bases Run #3: SRR002060, 25740337 spots, 849431121 bases 3:SRX012407 Submitter: GEO Study: GSE17153: Illumina sequencing of small RNAs from C. elegans embryos(SRP001363) Sample: Caenorhabditis elegans(SRS006961) Instrument: Illumina Genome Analyzer II Total: 1 run, 3M spots, 106.8M bases Run #1: SRR029428, 2965597 spots, 106761492 bases Is there a compact way to convert them into tabular format (tab separated). Hence 1 entry/row per chunk. In these case 3 rows. I tried this but doesn't seem to work. perl -laF/\n/ -000ne"print join chr(9),@F" myfile.txt

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  • Exporting tasks to 'C using DPI

    - by Alphaneo
    I have an verilog based test-bench, interfaced to 'C source using DPI. Now using DPI I am planning to write my whole firmware. To do this I need 3 things Register Read Register Write Interrupt handler As I understand, register reads and writes are tasks that I need to export from the RTL test-bench. And Interrupt handler (I implemented by importing a function from 'C). I checked most the cadence documentation and found no useful hints. I have also registered with cadence users community but it seems that I cannot ask question till they approve my registration. Just in case someone is aware of this, would appreciate their help.

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  • dynamic log4net appender name?

    - by sanjeev40084
    Let's say i have 3 smtp appenders in same log4net file whose names are: <appender name = "emailDevelopment".. /> <appender name = "emailBeta".. /> <appender name = "emailProduction".. /> Let's say i have 3 different servers(Dev, Beta, Production). Depending upon the server, i want to fire the log. In case of Development server, it would fire log from "emailDevelopment". I have a system variable in each server named "ApplicationEnvironment" whose value is Development, Beta, Production based on the server names. Now is there anyway i can setup root in log4net so that it fires email depending upon the server name. <root> <priority value="ALL" /> <appender-ref ref="email<environment name from whose appender should be used>" /> </root>

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  • Determine fonts used in postscript (.ps) file

    - by Bernard Vander Beken
    Given a postscript file that has the following header %!PS-Adobe-3.0 I would like to list all fonts used in the file. The output does not have to be perfect, but I need to make sure I get all references to any font being used. I am aware there are different types of fonts, and that a font may or may not be embedded in the postscript file. My current best idea is to grep/search for the word Font case insensitively and go from there. Will this get me all the font references? Any better way to achieve this? I tend to use .NET/C# for development purposes, but any solution is appreciated. Thanks, Bernard

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  • How to read a CLOB column in Oracle using OleDb ?

    - by T.Falise
    Hi, I have created a table on an Oracle 10g database with this structure : create table myTable ( id number(32,0) primary key, myData clob ) I can insert rows in the table without any problem, but when I try to read data from the table using OleDb connection, I get an exception. Here is the code I use : using (OleDbConnection dbConnection = new OleDbConnection("ConnectionString")) { dbConnection.Open(); OleDbCommand dbCommand = dbConnection.CreateCommand(); dbCommand.CommandText = "SELECT * FROM myTable WHERE id=?"; dbCommand.Parameters.AddWithValue("ID", id); OleDbDataReader dbReader = dbCommand.ExecuteReader(); } The exception details seems to point on an unsupported data type : System.Data.OleDb.OleDbException: Unspecified error Oracle error occurred, but error message could not be retrieved from Oracle. Data type is not supported. Does anyone know how I can read this data using the OleDb connection ? PS : The driver used in this case is the Microsoft one.

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  • Custom redirect using Joomla Artio SEF

    - by Krishna Priya
    Hi, I am using joomla Artio SEF for my website. I am using a form for new customer. So it uses index.php?form=newcustomer&Itemid=1 url as "joomla15/new-customer" as sef url. Now I need to add error message like index.php?form=newcustomer&Itemid=1&msg=".$msg after submitting this form. In this case it is not displaying as sef and showing "index.php?form=newcustomer&Itemid=1&msg=New Customer Received". I cld not use custom redirect also,becoz msg are dynamically generated. How cld i fix this issue? Anyone please help me. Thanks, Krishna

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  • double checked locking - objective c

    - by bandejapaisa
    I realised double checked locking is flawed in java due to the memory model, but that is usually associated with the singleton pattern and optimizing the creation of the singleton. What about under this case in objective-c: I have a boolean flag to determine if my application is streaming data or not. I have 3 methods, startStreaming, stopStreaming, streamingDataReceived and i protect them from multiple threads using: - (void) streamingDataReceived:(StreamingData *)streamingData { if (self.isStreaming) { @synchronized(self) { if (self.isStreaming) { - (void) stopStreaming { if (self.isStreaming) { @synchronized(self) { if (self.isStreaming) { - (void) startStreaming:(NSArray *)watchlistInstrumentData { if (!self.isStreaming) { @synchronized(self) { if (!self.isStreaming) { Is this double check uneccessary? Does the double check have similar problems in objective-c as in java? What are the alternatives to this pattern (anti-pattern). Thanks

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  • Injecting raw TCP packets with Python

    - by Evgeniy Arbatov
    Hello! What would be a suitable way to inject a raw TCP packet with Python? For example, I have the payload consisting of hexadecimal numbers and I want to send that sequence of hexadecimal numbers to a network daemon: so that if I choose to send 'abcdef', I see 'abcdef' on the wire too. But not '6162636566' as in the case of: new = socket.socket(socket.AF_INET, socket.SOCK_STREAM) new.connect(('127.0.0.1', 9999)) new.send('abcdef') Can I use Python's SOCK_RAW for this purpose? If so, can you give me an example of sending raw TCP packets with SOCK_RAW (since I did not get it working myself) Thanks! Evgeniy

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  • Converting time to Military

    - by Chris
    Maybe I'm seeing things.. In an attempt to turn a date with a format of "mm/dd/yyyy hh:mm:ss PM" into military time, the following replacement of a row value does not seem to take. Even though I am sure I have done this before (with column values other than dates). Is there some reason that row["adate"] would not accept a value assigned to it in this case? DateTime oos = DateTime.Parse(row["adate"].ToString()); row["adate"] = oos.Month.ToString() + "/" + oos.Day.ToString() + "/" + oos.Year.ToString() + " " + oos.Hour.ToString() + ":" + oos.Minute.ToString();

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