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• .Net System.Net.HttpWebRequest & Authentication Cookies

  - by James

  I would like to know if the following is possible: As part of the PageLoad of an ASP.Net page request: Use HttpWebRequest (POST) to make a request to a forms authentication webpage of a different web application Examine the response to see if the authentication succeeded (identifiable if an authentication cookie has been set) If it fails, then finish the ASP.Net page request, which will display a message saying "couldn't auto-login" or some such thing If success, then instead of completing the ASP.Net page lifecycle, use "Response.Write" to send the response from the HttpWebRequest back to the browser (thus essentially displaying the webpage from the HttpWebRequest) If the above is possible, then, is there also a way to transfer the authentication cookie from the HttpWebResponse to the requesting browser? My gut feeling is probably not - but if this is the case, then how do proxy servers handle such things? Is that not essentially what they are doing? Thanks for any help

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• Floating point arithmetic is too reliable.

  - by mcoolbeth

  I understand that floating point arithmetic as performed in modern computer systems is not always consistent with real arithmetic. I am trying to contrive a small C# program to demonstrate this. eg: static void Main(string[] args) { double x = 0, y = 0; x += 20013.8; x += 20012.7; y += 10016.4; y += 30010.1; Console.WriteLine("Result: "+ x + " " + y + " " + (x==y)); Console.Write("Press any key to continue . . . "); Console.ReadKey(true); } However, in this case, x and y are equal in the end. Is it possible for me to demonstrate the inconsistency of floating point arithmetic using a program of similar complexity, and without using any really crazy numbers? I would like, if possible, to avoid mathematically correct values that go more than a few places beyond the decimal point.

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• Correct way to get absolute url in django

  - by dreamiurg

  A problem that I stumbled upon recently, and, even though I solved it, I would like to hear your opinion of what correct/simple/adopted solution would be. I'm developing website using Django + python. When I run it on local machine with "python manage.py runserver", local address is http://127.0.0.1:8000/ by default. However, on production server my app has other url, with path - like "http://server.name/myproj/" I need to generate and use permanent urls. If I'm using {% url view params %}, I'm getting paths that are relative to / , since my urls.py contains this urlpatterns = patterns('', (r'^(\d+)?$', 'myproj.myapp.views.index'), (r'^img/(.*)$', 'django.views.static.serve', {'document_root': settings.MEDIA_ROOT + '/img' }), (r'^css/(.*)$', 'django.views.static.serve', {'document_root': settings.MEDIA_ROOT + '/css' }), ) So far, I see 2 solutions: modify urls.py, include '/myproj/' in case of production run use request.build_absolute_uri() for creating link in views.py or pass some variable with 'hostname:port/path' in templates Are there prettier ways to deal with this problem? Thank you.

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• relational database: how to design this table

  - by donpal

  I'm a database newbie designing a database. I'll use SO to ask my question because it's easier to ask it on something that you can see already, but it's not the same, it will just help me understand the right approach. As you can see, there are many questions here and each can have many answers. How should I store the answers in a table? Should I store all the answers in the SAME table with a unique id (make it the key) and just a new field for the question id? What if there are 100,000 answers like there is here? Do I still store them in 1 table? What keys should I use to minimize search time when I want to search for the answers of a specific question? The database is both read and write if that makes any difference in this case.

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• Combining multiple lines into one line

  - by mkal

  I have this use case of an xml file with input like Input: <abc a="1"> <val>0.25</val> </abc> <abc a="2"> <val>0.25</val> </abc> <abc a="3"> <val>0.35</val> </abc> ... Output: <abc a="1"><val>0.25</val></abc> <abc a="2"><val>0.25</val></abc> <abc a="3"><val>0.35</val></abc> I have around 200K lines in a file in the Input format, how can I quickly convert this into output format.

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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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• 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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• change Visibility of a control in ASP.NET code behind (c#)

  - by Axel Grude

  How do you set the visibility of a (fileupload) control from ASP.net code (I need to hide a fileupload control in a webuser control from server site, otherwise hasFIle is always false). Also setting the "Visible" property to false does not work (as is confuses the AJAX panel so the fileupload forgets that it has a file). theFileUpload.Visible = false = does not work so I want to try to set the CSS style visibility to hidden or display to none. The main problem is I want to do it from the server side (I know how I could do it on client). Is there a safe way to overwrite theFileUpload.Attributes["styles"] in case I modify other CSS styles in there, also throwing a whole CSS class at it (by moidifying the CSSClass property) seems like overkill. thanks in advance Axel

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• zlib memory usage / performance. With 500kb of data.

  - by unixman83

  Is zLib Worth it? Are there other better suited compressors? I am using an embedded system. Frequently, I have only 3MB of RAM or less available to my application. So I am considering using zlib to compress my buffers. I am concerned about overhead however. The buffer's average size will be 30kb. This probably won't get compressed by zlib. Anyone know of a good compressor for extremely limited memory environments? However, I will experience occasional maximum buffer sizes of 700kb, with 500kb much more common. Is zlib worth it in this case? Or is the overhead too much to justify? My sole considerations for compression are RAM overhead of algorithm and performance at least as good as zlib.

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• How to make Visual Studio Pause after executing a console app in debug mode?

  - by Jason Dagit

  I have a collection of boost unit tests I want to run as a console application. When I'm working on the project and I run the tests I would like to be able to debug the tests and I would like to have the console stay open after the tests run. I see that if I run in release mode the console window stays up after the program exits, but in debug mode this is not the case. I do not want to add 'system("pause");' or any other hacks like reading a character to my program. I just want to make Visual Studio pause after running the tests with debugging like it would if I were running in release mode. I would also like it if the output of tests were captured in one of Visual Studio's output windows but that also seems to be harder than it should be. How can I do this? Thanks!

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• jQuery - How to remove a DOM element BEFORE complete page load

  - by webfac

  Now this may seem like a silly question, but I need to know how to remove a DOM element BEFORE it is displayed to the user. In short, I am using a div that has a background image alerting the user to enable javascript before proceeding. If the user has javascript enabled I am using jQuery to remove the DOM element, in this case $(".check-js") which is the div housing the image. Using the conventional methods to unload DOM objects as follows does not work because it waits for the page load to complete, then removes the element, causing the image to flicker on and off each time the page loads: $(function(){ $(".check-js").css( {display:"none"} ) }) I simply want to remove the div if the user has js enabled, and he must never see this div. Any suggestions and I will be grateful, thanks.

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• How to change a UIBarButtonItem in a UINavigationBar

  - by pkulak

  I'm trying to set up a list of items that can be edited. I have a main view, with a UINavigationBar at the top and a UITableView directly under it. I'd like to have my "edit" button change to a "done" button on click, but I can't figure out how to do it. If I could do it in the code (not it interface builder), I could just replace it, but I can't even do that. I've seen some code using [self.navigationItem], but in my case self is a UIView. It also feels a bit odd to be using a UINavigationBar when I don't want navigation (this is one page only), but I want a toolbar with a title and and a button, so I don't think really have a choice.

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• What is the relationship between recursion functions and memory stack?

  - by Eslam

  is there's a direct relationship between recursive functions and the memory stack, for more explanation consider that code: public static int triangle(int n) { System.out.println(“Entering: n = ” + n); if (n == 1) { System.out.println(“Returning 1”); return 1; } else { int temp = n + triangle(n - 1); System.out.println(“Returning“ + temp); return temp; } }? in this example where will the values 2,3,4,5 be stored until the function returns ? note that they will be returned in LIFO(LastInFirstOut) is these a special case of recursion that deals with the memory stack or they always goes together?

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• resolving incidents (closing cases) in CRM4 through webservices?

  - by Rafael D.

  Hello everybody, I'm trying to resolve/close Dynamics CRM4 cases/incidents through webservices. A single SetStateIncidentRequest is not enough and returns a Server was unable to process request error message. I think it has something to do with active workflows that trigger on case's attribute changes. I don't know if there's anything else preventing the request to work. Since it is possible to close those cases through the GUI, I guess there's a "correct" set of steps to follow in order to achieve it through CrmService; unfortunately, I've been googleing it for a while without finding what I want. Could anybody help me, please?

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• How to rotate an SSE/AVX vector

  - by user1584773

  I need to perform a rotate operation with as little clock cycle as possible. In the first case let's assume __m128i as source and dest type source: || A0 || A1 || A2 || A3 || dest : || A1 || A2 || A3 || A0 || dest = (__m128i)_mm_shuffle_epi32((__m128i)source, _MM_SHUFFLE(0,3,2,1)); Now I want to do the same whit AVX intrinsics So let's assume this time __m256i as source and dest type source: || A0 || A1 || A2 || A3 || A4 || A5 || A6 || A7 || dest : || A1 || A2 || A3 || A4 || A5 || A6 || A7 || A0 || The Avx intrinsics is missing most of the corresponding SSE integer operations. Maybe there is some way go get the desider output working with the floating point version. I've tryed with: dest = (__m256i)_mm256_shuffle_ps((__m256)source, (__m256)source, _MM_SHUFFLE(0,3,2,1)); but what I get is: || A0 || A2 || A3 || A4 || A5 || A6 || A7 || A1 || Any Idea on how to solve this in an efficient way? (without mixing SSE and AVX operation and without "manually" inverting A0 and A1 Thanks in advance!

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• Better to build or buy a compute grid platform?

  - by James B

  I am looking to do some quite processor-intensive brute force processing for string matching. I have run my prototype in a multi-threaded environment and compared the performance to an implementation using Gridgain with a couple of nodes (also multithreaded). The performance I observed was that my Gridgain implementation performed slower to my multithreaded implementation. It could be the case that there was a flaw in my gridgain implementation, but it was only a prototype, and I thought the results were indicative. So my question is this: What are the advantages of having to learn and then build an implementation for a particular grid platform (hadoop, gridgain, or EC2 if going hosted - other suggestions welcome), when one could fairly easily put together a lightweight compute grid platform with a much shallower learning curve?...i.e. what do we get for free with these cloud/grid platforms that are worth having/tricky to implement? (Please note, I don't have any need for a data grid) Cheers, -James (p.s. Happy to make this community wiki if needbe)

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• Why not use development provisioning instead of ad hoc?

  - by lawrence

  I was under the impression that when you use a development provisioning profile for a build of an app, only the specified developers can deploy that build to a phone. But I just deployed a build that uses a development profile to a phone using Xcode Organizer, even though I'm not one of the valid developers for that profile. One of my colleagues, also not a valid developer, did the same with his phone using iTunes. In that case, why not use a development provisioning profile for distributing your app to e.g. your QA team, instead of ad hoc distribution?

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• How can I get popup window using commandButton in Trinidad?

  - by vikram

  How can I get popup window using commandButton in Trinidad? My problem is that by clicking on Add button from dialogdemo.jspx, not any popup window or dialog box is opened. This is dialogdemo.jspx file: <jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" xmlns:f="http://java.sun.com/jsf/core" xmlns:tr="http://myfaces.apache.org/trinidad" version="1.2"> <jsp:directive.page contentType="text/html;charset=utf-8" /> <f:view> <tr:document title="Dialog Demo"> <tr:form> <!-- The field for the value; we point partialTriggers at the button to ensure it gets redrawn when we return --> <tr:inputText label="Pick a number:" partialTriggers="buttonId" value="#{launchDialog.input}" /> <!-- The button for launching the dialog: we've also configured the width and height of that window --> <tr:commandButton text="Add" action="dialog:chooseInteger" id="buttonId" windowWidth="300" windowHeight="200" partialSubmit="true" useWindow="true" returnListener="#{launchDialog.returned}" /> </tr:form> </tr:document> </f:view> </jsp:root> Here is the associated managed bean LaunchDialogBean.java: package jsfpkg; import org.apache.myfaces.trinidad.component.UIXInput; import org.apache.myfaces.trinidad.event.ReturnEvent; public class LaunchDialogBean { private UIXInput _input; public UIXInput getInput() { return _input; } public void setInput(UIXInput input) { _input = input; } public void returned(ReturnEvent event) { if (event.getReturnValue() != null) { getInput().setSubmittedValue(null); getInput().setValue(event.getReturnValue()); } } } Here is the popup file Popup.jspx: <jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:trh="http://myfaces.apache.org/trinidad/html" xmlns:tr="http://myfaces.apache.org/trinidad" version="2.0"> <jsp:directive.page contentType="text/html;charset=utf-8" /> <f:view> <tr:document title="Add dialog"> <tr:form> <!-- Two input fields --> <tr:panelForm> <tr:inputText label="Number 1:" value="#{chooseInteger.value1}" required="true" /> <tr:inputText label="Number 2:" value="#{chooseInteger.value2}" required="true" /> </tr:panelForm> <!-- Two buttons --> <tr:panelGroup layout="horizontal"> <tr:commandButton text="Submit" action="#{chooseInteger.select}" /> <tr:commandButton text="Cancel" immediate="true" action="#{chooseInteger.cancel}" /> </tr:panelGroup> </tr:form> </tr:document> </f:view> </jsp:root> For that I have written the bean ChooseIntegerBean.java package jsfpkg; import org.apache.myfaces.trinidad.context.RequestContext; public class ChooseIntegerBean { private Integer _value1; private Integer _value2; public Integer getValue1() { return _value1; } public void setValue1(Integer value1) { _value1 = value1; } public Integer getValue2() { return _value2; } public void setValue2(Integer value2) { _value2 = value2; } public String cancel() { RequestContext.getCurrentInstance().returnFromDialog(null, null); return null; } public String select() { Integer value = new Integer(getValue1().intValue() + getValue2().intValue()); RequestContext.getCurrentInstance().returnFromDialog(value, null); return null; } } Here is my faces-config.xml: <managed-bean> <managed-bean-name>chooseInteger</managed-bean-name> <managed-bean-class>jsfpkg.ChooseIntegerBean</managed-bean-class> <managed-bean-scope>request</managed-bean-scope> </managed-bean> <managed-bean> <managed-bean-name>launchDialog</managed-bean-name> <managed-bean-class>jsfpkg.LaunchDialogBean</managed-bean-class> <managed-bean-scope> request </managed-bean-scope> </managed-bean> <navigation-rule> <from-view-id>/dialogdemo.jspx</from-view-id> <navigation-case> <from-outcome>dialog:chooseInteger</from-outcome> <to-view-id>/dialogbox.jspx</to-view-id> </navigation-case> </navigation-rule>

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• return to merchent problme in paypal.

  - by Avinash

  Hi, I am using paypal standard as my payment gateway. My problem is that, in Paypal Standard payment method, I have done my code as below: When user click on return to merchant button from paypal then user return to the site with order data , and on that page my order entry will be inserted in my DB. So my problem occur when someone pays but don't click on return to merchant link. So in this case customer gets paid, but due to no entry my DB its not working proper. Hope I am clear to all. Thanks Avinash

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• postgres - ERROR: syntax error at or near "COST"

  - by cino21122

  EDIT Taking COST 100 out made the command go through, however, I'm still unable to run my query because it yields this error: ERROR: function group_concat(character) does not exist HINT: No function matches the given name and argument types. You may need to add explicit type casts. The query I'm running is this: select tpid, group_concat(z) as z, group_concat(cast(r as char(2))) as r, group_concat(to_char(datecreated,'DD-Mon-YYYY HH12:MI am')) as datecreated, group_concat(to_char(datemodified,'DD-Mon-YYYY HH12:MI am')) as datemodified from tpids group by tpid order by tpid, zip This function seems to work fine locally, but moving it online yields this error... Is there something I'm missing? CREATE OR REPLACE FUNCTION group_concat(text, text) RETURNS text AS $BODY$ SELECT CASE WHEN $2 IS NULL THEN $1 WHEN $1 IS NULL THEN $2 ELSE $1 operator(pg_catalog.||) ',' operator(pg_catalog.||) $2 END $BODY$ LANGUAGE 'sql' IMMUTABLE COST 100; ALTER FUNCTION group_concat(text, text) OWNER TO j76dd3;

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• ItemSearch totally different from Amazon.com search - What am I doing wrong?

  - by RadiantHex

  I'm using ItemSearch in order to get a list of books ordered by 'salesrank' aka 'bestselling', problem is that the books that pop up for any BrowseNode are totally different from the Amazon list. Test Case Author:"J R R Tolkien", SearchIndex:"Books", Sort:"salesrank" Using the API: J.R.R. Tolkien Boxed Set (The Hobbit and The Lord of the Rings) The Hobbit: 70th Anniversary Edition The Lord of the Rings: 50th Anniversary, One Vol. Edition The Legend of Sigurd and Gudrun The Silmarillion The Lord of the Rings The Children of Hurin The Fellowship of the Ring: Being the First Part of The Lord of the Rings The Return of the King: Being the Third Part of The Lord of the Rings Using Amazon.com Adv. Search: The Lord of the Rings (Trilogy) The Hobbit J.R.R. Tolkien Boxed Set (The Hobbit and The Lord of the Rings) The Legend of Sigurd and Gudrun The Lord of the Rings: 50th Anniversary, One Vol. Edition The Silmarillion The Fellowship of the Ring The Children of Hurin Lord of the Rings, The Return of the King, The (Vol 3) Help would very much appreciated

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• Views performance in MySQL for denormalization

  - by Gianluca Bargelli

  I am currently writing my truly first PHP Application and i would like to know how to project/design/implement MySQL Views properly; In my particular case User data is spread across several tables (as a consequence of Database Normalization) and i was thinking to use a View to group data into one large table: CREATE VIEW `Users_Merged` ( name, surname, email, phone, role ) AS ( SELECT name, surname, email, phone, 'Customer' FROM `Customer` ) UNION ( SELECT name, surname, email, tel, 'Admin' FROM `Administrator` ) UNION ( SELECT name, surname, email, tel, 'Manager' FROM `manager` ); This way i can use the View's data from the PHP app easily but i don't really know how much this can affect performance. For example: SELECT * from `Users_Merged` WHERE role = 'Admin'; Is the right way to filter view's data or should i filter BEFORE creating the view itself? (I need this to have a list of users and the functionality to filter them by role). EDIT Specifically what i'm trying to obtain is Denormalization of three tables into one. Is my solution correct? See Denormalization on wikipedia

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• WPF: How to get the event when one FrameworkElement comes in contact with other FrameworkElement

  - by Raghav

  I am developing a small application with images and trash box icon on right hand bottom. I have multiple images floating in the main window, and using mouse I can move image from one corner to other corner of window, left, right, top and bottom. I can't figure out how do I catch an event when a image touches and panel (with trash box image), in the right hand corner. Does anybody knows which event or handler to listen? This is not a drag and drop case since my images are floating so no point using drag and drop. Thank you

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• In TFS, is there a maximum amount of workspaces which can be used for a user?

  - by Gerrie Schenck

  I'm currently in the process of creating a bunch of new build scripts for our platform. Things went okay until I encountered the following error: D:\TFS\WorkingDir\BuildType\TFSBuild.proj(173,5): error MSB4018: Microsoft.TeamFoundation.VersionControl.Client.WorkspaceNotFoundException: TF14061: The workspace BUILDMACHINENAME_9;BUILDMACHINENAME\TFSService does not exist. When I take a look at the list of workspaces (with Team Foundation Sidekicks) I see there are a bunch of BUILDMACHINENAME_xxx workspaces, where xxx is a number ranging from 1 to 8. What I'm thinking is that TFS reaches some kind of limit (10 probably) of the amount of workspaces it can create for a certain owner, and thus fails to create a workspace for the build automatically. Can this be the case? Anyone else encountered this?

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• How to force user to user Administrator account in WinForms

  - by Smejda

  I have simple WinForms application where modifying Windows Registry. The problem is that in Vista / Windows 7 I need to force user to switch to administrator. I do not want to force user to Run as Administrator form start of the application. I want him to do it when there is necessity to write to registry. Best case scenario would be to reach exacly the same message which appear in lot's of Setups, when user need to 'switch' to Administrator so there is no necessity to Run as Administrator form beginning. How I can achieve this in .Net ?

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