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• Automated browsing with javascript?

  - by Paul Wicks

  I'm trying to do some browser automation, but I'm having some problems. Basically, what I'd like to do is load a set pages, set some forms options, click a button and view the results for each page that I open. Originally, I tried to do this by placing the pages I wanted to automate in iframes and then using javascript to drive the interactions I want in each, but that results in a Permissions Error, since the sites I want to automate are not on my server. Is there any way around this? The other possibility I've thought of is to use QT's webkit class and the evaluateJavaScript method to accomplish what I'd like to do, but this seems a bit more heavy weight for something that is, conceptually, pretty simple.

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• Loading UINavigationController subclass from a Nib

  - by Rits

  My situation is as follows: My class SettingsViewController is a subclass of UINavigationController. That class contains the logic of its rootViewController. For example, it acts as the delegate and data source for two table views in that root view controller. I have no problem setting this up programmatically. In the initializer of SettingsViewController, I can create an additional UIViewController to serve as the root view controller, position the table views in its view, and set their delegates and data sources to self. But I want to load that root view via a Nib. The problem is, I do not know how to connect that Nib with my SettingsViewController, how to set the delegates and data sources. The SettingsViewController is not accessible from within the Nib. 'File Owner' represents the root view controller, not the SettingsViewController. How do I access my UINavigationController subclass from within my root view controllers Nib? Thanks in advance.

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• C Class Instance from Void Pointer using Ctypes

  - by g.d.d.c

  I've got a C DLL that exposes a handful of methods that return void pointers to a Class like so: void *GetLicense() { static AppLicenseImpl ipds_; return (void *) &ipds_; } In C++, after loading the DLL, I'd do this to work with it: typedef void *(* FPGetLicense)(); GetLicense_ = (FPGetLicense)GetAddress("GetLicense"); license_ = (AppLicense *) GetLicense_(); license_->GetApplicationStatus(); // Load data so that other calls don't fail I can't figure out how to parallel that in Python. This gets me the pointer: d = ctypes.cdll.LoadLibrary('license.dll') d.GetLicense.restype = ctypes.c_void_p p = d.GetLicense() # returns ptr loc, something like 8791433660848L But I obviously can't call p.GetApplicationStatus() in Python. Does anyone have a suggestion on how I'd instantiate that Class the rest of the way in Python so that I can call GetApplicationStatus()?

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• Dynamically Loading a DLL

  - by TooFat

  I am trying to simply load a dll written in C# at run time and create an instance of a class in that dll. Assembly a = Assembly.LoadFrom(@"C:\Development\DaDll.dll"); Type type = a.GetType("FileReleaseHandler", true); TestInterface.INeeedHelp handler = Activator.CreateInstance(type) as TestInterface.INeeedHelp; No errors are thrown, and if I step through the code I can walk though the FileReleaseHandler Class as it executes the constructor but the value of handler is always null. What am I missing here? or even is there a better way I should be going about this?

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• Vim open file under cursor

  - by ereOn

  Hi, Let's say I have the following file tree: / include/ library/ a.hpp b.hpp src/ a.cpp b.cpp And the following /src/a.cpp file: #include "a.hpp" #include "b.hpp" I always open Vim at the root directory. So when I want to load a.hpp I do : :tabnew include/library/a.hpp or: :tabnew **/a.hpp I'd like to map <F4> to open the file under the cursor in a new tab, using a recursive search. I tried the following mapping command: :map <F4> :tabnew **/expand("<cfile>")<cr> But obviously, this can't work, as it tries to open the file "/expand(" instead. Any clue on how I could do that ? Thanks.

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• Improving HTML scrapper efficiency with pcntl_fork()

  - by Michael Pasqualone

  With the help from two previous questions, I now have a working HTML scrapper that feeds product information into a database. What I am now trying to do is improve efficiently by wrapping my brain around with getting my scrapper working with pcntl_fork. If I split my php5-cli script into 10 separate chunks, I improve total runtime by a large factor so I know I am not i/o or cpu bound but just limited by the linear nature of my scraping functions. Using code I've cobbled together from multiple sources, I have this working test: <?php libxml_use_internal_errors(true); ini_set('max_execution_time', 0); ini_set('max_input_time', 0); set_time_limit(0); $hrefArray = array("http://slashdot.org", "http://slashdot.org", "http://slashdot.org", "http://slashdot.org"); function doDomStuff($singleHref,$childPid) { $html = new DOMDocument(); $html->loadHtmlFile($singleHref); $xPath = new DOMXPath($html); $domQuery = '//div[@id="slogan"]/h2'; $domReturn = $xPath->query($domQuery); foreach($domReturn as $return) { $slogan = $return->nodeValue; echo "Child PID #" . $childPid . " says: " . $slogan . "\n"; } } $pids = array(); foreach ($hrefArray as $singleHref) { $pid = pcntl_fork(); if ($pid == -1) { die("Couldn't fork, error!"); } elseif ($pid > 0) { // We are the parent $pids[] = $pid; } else { // We are the child $childPid = posix_getpid(); doDomStuff($singleHref,$childPid); exit(0); } } foreach ($pids as $pid) { pcntl_waitpid($pid, $status); } // Clear the libxml buffer so it doesn't fill up libxml_clear_errors(); Which raises the following questions: 1) Given my hrefArray contains 4 urls - if the array was to contain say 1,000 product urls this code would spawn 1,000 child processes? If so, what is the best way to limit the amount of processes to say 10, and again 1,000 urls as an example split the child work load to 100 products per child (10 x 100). 2) I've learn that pcntl_fork creates a copy of the process and all variables, classes, etc. What I would like to do is replace my hrefArray variable with a DOMDocument query that builds the list of products to scrape, and then feeds them off to child processes to do the processing - so spreading the load across 10 child workers. My brain is telling I need to do something like the following (obviously this doesn't work, so don't run it): <?php libxml_use_internal_errors(true); ini_set('max_execution_time', 0); ini_set('max_input_time', 0); set_time_limit(0); $maxChildWorkers = 10; $html = new DOMDocument(); $html->loadHtmlFile('http://xxxx'); $xPath = new DOMXPath($html); $domQuery = '//div[@id=productDetail]/a'; $domReturn = $xPath->query($domQuery); $hrefsArray[] = $domReturn->getAttribute('href'); function doDomStuff($singleHref) { // Do stuff here with each product } // To figure out: Split href array into $maxChilderWorks # of workArray1, workArray2 ... workArray10. $pids = array(); foreach ($workArray(1,2,3 ... 10) as $singleHref) { $pid = pcntl_fork(); if ($pid == -1) { die("Couldn't fork, error!"); } elseif ($pid > 0) { // We are the parent $pids[] = $pid; } else { // We are the child $childPid = posix_getpid(); doDomStuff($singleHref); exit(0); } } foreach ($pids as $pid) { pcntl_waitpid($pid, $status); } // Clear the libxml buffer so it doesn't fill up libxml_clear_errors(); But what I can't figure out is how to build my hrefsArray[] in the master/parent process only and feed it off to the child process. Currently everything I've tried causes loops in the child processes. I.e. my hrefsArray gets built in the master, and in each subsequent child process. I am sure I am going about this all totally wrong, so would greatly appreciate just general nudge in the right direction.

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• What's wrong in this SELECT statement

  - by user522211

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim SQLData As New System.Data.SqlClient.SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True") Dim cmdSelect As New System.Data.SqlClient.SqlCommand("SELECT * FROM Table1 WHERE Seats ='" & TextBox1.Text & "'", SQLData) SQLData.Open() Using adapter As New SqlDataAdapter(cmdSelect) Using table As New Data.DataTable() adapter.Fill(table) TextBox1.Text = [String].Join(", ", table.AsEnumerable().[Select](Function(r) r.Field(Of Integer)("seat_select"))) End Using End Using SQLData.Close() End Sub This line will be highlighted with blue line: TextBox1.Text = [String].Join(", ", table.AsEnumerable().[Select](Function(r) r.Field(Of Integer)("seat_select")))

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• A reasonable way to add attributes to an xml root element in C#.

  - by DrLazer

  The function "WriteStartElement" does not return anything. I find this a little bizzare. So up until now I have been doing it like this. XmlDocument xmlDoc = new XmlDocument(); XmlTextWriter xmlWriter = new XmlTextWriter(m_targetFilePath, System.Text.Encoding.UTF8); xmlWriter.Formatting = Formatting.Indented; xmlWriter.WriteProcessingInstruction("xml", "version='1.0' encoding='UTF-8'"); xmlWriter.WriteStartElement("client"); xmlWriter.Close(); xmlDoc.Load(m_targetFilePath); XmlElement root = xmlDoc.DocumentElement; Saving the doc, then reloading it to get hold of the start element so i can write attributes to it. Does anybody know the correct way of doing this because I'm pretty sure what I'm doing isn't right. I tried to use xmlWriter.AppendChild() but it doesnt seem to write out anything. :(

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• Use one single DLL library to import other libraries at runtime

  - by Yifan

  I am writing a Win32 DLL library that can be redistributed. I am using different versions of the windows API because I want to support Windows 7 functions, but still have support for Windows 2000 (with some function disabled). What I have currently is MyLib2000.dll, MyLibXP.dll, and MyLibVista.dll, and my application chooses which library to load at runtime. I want a way to have a single DLL (MyLib.dll) that stores the other three in itself and when it's being loaded, it extracts the correct DLL out of itself and loads it. I know this is not the best way to do this, so suggestions on another method of doing this is welcome.

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• Extracting public key from private key in OpenSSL

  - by ereOn

  Hello, I need to extract the RSA public key from a RSA private key using OpenSSL. I'm currently using RSAPublicKey_dup() passing the RSA* private key to get the public key. However, while the call seems to work, I cannot load (or use) this public key using the openssl command-line tool. If I generate the public key using the command-line tool ("$ openssl rsa -in private.pem -pubout > public.pem"), I can use it and it works like a charm. Do you guys know how I can get this work ? Maybe another function ? The OpenSSL documentation is quite hard to browse... Thank you.

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• how much time it will take to learn action script 3 in flash

  - by Mirage

  I know php mysql , javascript , jquery very well. I have never touced flash. Now have to do website in complete flash with action scripting. Keeping flash animation and scripting separate. How much time it will take for me to build e,g 1)Simple page with 1 column layout like , header , navigation bar , content. 2)The navigation items will be loaded from database using xml and flash 3)The content will also load from database depending upon navigation item clicked HOw much time forinserting flash objects and how much time for scripting. Thanks

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• External SWF Loading problem

  - by Glycerine

  I have an SWF loading in an SWF containing a papervision scene. I've done it before yet problem is, I get an error - I'm not sure what the issue really is. private function downloadSWF(url:String):void { trace(url); var urlRequest:URLRequest = new URLRequest(url); var loader:Loader = new Loader(); loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loaderProgressEventHandler); loader.load(urlRequest); } private function loaderProgressEventHandler(ev:ProgressEvent):void { loader.preloaderCircle.percent = ev.bytesLoaded / ev.bytesTotal; } When the application runs the code - I get the error: TypeError: Error #1009: Cannot access a property or method of a null object reference. at com.dehash.pv3d.examples.physics::WowDemo() Why am I getting this if the loading hasn't even complete yet? Thanks in advance guys.

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• Is there any Prototype Javascript function similar to Jquery Live to trace dynamic dom elements?

  - by Wbdvlpr

  Hi Event.observe(window,"load",function() { $$(".elem_classs").findAll(function(node){ return node.getAttribute('title'); }).each(function(node){ new Tooltip(node,node.title); node.removeAttribute("title"); }); }); Using above method, I can retrieve all elements having ".elem_class" and apply some javascript functions on them. But I have a modal/popup box which has some elements also having ".elem_class" and these dont get in the scope of findAll/each as they are loaded into the dom thru ajax. How do I apply the same to dynamically loaded elements as well? I am using Prototype Library. (I have used JQuery's Live function which keeps track of all future elements, but need to achieve something similar using Prototype) Thanks.

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• loading xml slow down my site

  - by Ayrton

  Hi is it possible that loading an xml is slowing down my site? I've written this little function in php to iterate over an array of Strings to calculate the total amount of my followers function getFeedCount() { foreach ($array as $value) { $xml = simplexml_load_file("http://api.feedburner.com/awareness/1.0/GetFeedData?uri=$value") or die ("Unable to load XML file!"); $circulation += $xml->feed->entry['circulation']; } return $circulation; } the array is about 10 items big and since I started using it, it really slowed down my site. What could I do fix this issue.

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• Allowing developer-specific settings in VS2008 projects

  - by Xavier Nodet

  Is it possible to combine the following properties, and if so, how? Store in our version control system some Visual Studio 2008 native C++ project files for the developers in our team that use this IDE. Allow some of those developers to tweak their projects (e.g. using debug version of third-party libraries instead of the usual ones). Make sure these modifications are done in files that are not versioned. In other words, I would like to allow developers to tweak some settings in their projects without risking that these changes are committed. An 'optional VSPROP' file approach seems doomed to fail, as VS2008 refuses to load projects that refer to non-existent VSPROP files... Any other suggestion? Is this possible with VS2010?

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• Scope of variables inside of javascript

  - by wcpro

  I have the following code sample that im trying to wrap my head around $(document).ready(function () { test("load json", function () { length = 0; // length = 0 $.getJSON("plugins/form.json", function (data) { length = data.fields.length; // length = 4 }); ok(length == 4, "length = " + length.toString()); // length = 0? wtf? }); }); the 'length' variable does not persist when the $.getJSON runs. I cant figure out if its because its asynchronous or because the variable is out of scope.

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• jquery/javascript: accessing contents of an iframe

  - by rz

  I would like to manipulate the html inside an iframe using jquery. I thought I'd be able to do this by setting the context of the jQuery function to be the document of the iframe, something like: $(function(){//document ready $('some selector', frames['nameOfMyIframe'].document).doStuff() }); However this doesn't seem to work. A bit of inspection shows me that the variables in frames['nameOfMyIframe'] are undefined unless I wait a while for the iframe to load. However, when the iframe loads the variables are unaccessible (I get permission denied type errors). Does anyone know of way to work around this?

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• DropDownList selectedValue not changing display

  - by MemphisDeveloper

  I have a list of controls that I change based on an event. The controls are contained within a table that is created dynamically. I traverse through a set of controls and if it is a RadioButtonList or a DropDownList I do the following: CType(cntrl, ListControl).SelectedValue = val The radio buttons set just fine but the dropdown list doesn't reset. Can anyone tell me why. The initial table is created on the first Page Load and stored in memory. It's values are changed during the eventhandling and reposted to a MasterPage's content holder.

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• Using Jquery, call function on selection just once

  - by maxp

  Say i have a selection of textboxes like this; var arrayoftextboxes = $('.textbox1, .textbox2, .textbox3'); Is there a way I can call a function on each one in a simpler way than this? It only needs to be called once. arrayoftextboxes.each(function(i){foo(arrayoftextboxes[i]);}); I tried arrayoftextboxes.load(function(){foo(this)}); and arrayoftextboxes.bind(function(){foo(this)}); but the functions dont seem to be called.

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• Page doesn't post to the given URL

  - by Sri Kumar

  Hello All, I have the following HTML content. When i click the button, the page doesn't post to URL provided in action tag. The corresponding application is running, but still the page load of the CrossPage.aspx was not invoked. What could be the problem? <body> <form id="UploadForm" method="post" enctype="multipart/form-data" action="http://localhost:2518/Web/CrossPage.aspx"> <div> <input type="file" id="BtnUpload" /> <input type="button" id="BtnSubmit" value="Submit" /> </div> </form> </body>

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• php : open a file download dialog

  - by Hugh Valin

  I have a mpg file hosted in Amazon S3, that I want to link to a page I have, so the user will be able to download it from the page. I have in my page a linke: bla bla" The link to the file workds when I right click it and choose "Save Target As" , but I would like it to work also when I left click it, and that it will open a file download dialog. right now, a left click will direct to a page that has the video directly played in it (in FireFox) or just won't load (in Explorer) I am working in php, anyone has a clue why this happens?

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• How can I consume A web-service reference like a dll

  - by Sergiu

  I have a small question: Can we consume a web-service reference like a sample dll? I mean something like following: 1. Add reference to assembly in the references 2. add namespace to using (using mywebservice) 3. use it in code like: var service = new mywebservice.Service1(); var result = service.GetSomething()? Why I'm asking? It's because of I tried but I get a "strange" error: Cannot load assembly "MyService.dll version, and so on". Thanks in advance!

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• Efficient alternatives to merge for larger data.frames R

  - by Etienne Low-Décarie

  I am looking for an efficient (both computer resource wise and learning/implementation wise) method to merge two larger (size1 million / 300 KB RData file) data frames. "merge" in base R and "join" in plyr appear to use up all my memory effectively crashing my system. Example load test data frame and try test.merged<-merge(test, test) or test.merged<-join(test, test, type="all") - The following post provides a list of merge and alternatives: How to join data frames in R (inner, outer, left, right)? The following allows object size inspection: https://heuristically.wordpress.com/2010/01/04/r-memory-usage-statistics-variable/ Data produced by anonym

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• Trouble dragging and dropping gui components onto other .net forms using NHibernate

  - by IsaacB

  Hi, using VS2008, here. I have a GUI component that loads some stuff from a database mapped by nhibernate in its constructor. When I drag and drop this component onto another form from the toolbox, NHibernate complains that it can't find the config file in program files\visual studio 9\common7\ide. Why is it looking here for the cfg file? I'm actually calling database stuff through another project in the same solution, and the cfg file is located at the root of that project. copy/pasting the cfg file over to there does work, but I'm working with svn here and I don't want to have configuration files outside the repository. Something else that would help would be turning off how it tries to load the data in the form design screen. How would I do that?

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• How do you use multiple versions of the same R package?

  - by Richie Cotton

  In order to be able to compare two versions of a package, I need to able to choose which version of the package that I load. R's package system is set to by default to overwrite existing packages, so that you always have the latest version. How do I override this behaviour? My thoughts so far are: I could get the package sources, edit the descriptions to give different names and build, in effect, two different packages. I'd rather be able to work directly with the binaries though, as it is much less hassle. I don't necessarily need to have both versions of the packages loaded at the same time (just installed somewhere at the same time). I could perhaps mess about with Sys.getenv('R_HOME') to change the place where R installs the packages, and then .libpaths() to change the place where R looks for them. This seems hacky though, so does anyone have any better ideas?

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