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Articles indexed Wednesday December 22 2010

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• A Couple Android Soft Keyboard Questions

  - by Rich

  This is kind of a repost, and I apologize for any broken rules, but I have a couple of questions about the soft keyboard on Android phones: 1) I have an Android app with a couple different views (that the user switches between). How can I determine which is the current view?? I need to get the current view to execute the code that hides the virtual keyboard. 2) How can I check whether the virtual keyboard is currently being displayed (so I can filter the actions of my various hard keys)?? Thanks, R.

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• jquery ajax post not working with .load in codeigniter

  - by bravo

  i wish to .load multiple views result with jquery ajax the original code (js) $(document).ready(function(){ $("#uid").change( function(){ var uid=$("#uid").val(); $.ajax({ type: "POST", url: "<?= site_url('sp_profile/ajax_userdetail') ?>", dataType: "json", data: "uid="+uid, cache:false, success: function(data){ $("#content").html(data); } }); return false; }); }); this return only one result in what if i want to load 3 results like in <div id="content"></div> <div id="content1"></div> <div id="content2"></div> content could be userid content2 could be user first name content3 could be user last name my js should using .load instead of html right? let me know if i'm wrong. success: function(data){ $("#content").load("<?= site_url('sp_profile/ajax_userdetail')?>"); $("#content2").load("<?= site_url('sp_profile/ajax_userdetail')?>"); $("#content3").load("<?= site_url('sp_profile/ajax_userdetail')?>"); } i stuck with this thing for whole day.. please anyone show me the right way to do the controller and js code.

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• Is this a correct iText design?

  - by Lucas

  I´m making some pdf reports to be used on a web app. I wonder if the way I´m taking to make the designs is appropriated. This would be a screenshot of the way I´m doing the things. As you can see, I´m using tables to position everything in the document. I think this is a pretty much similar design to HTML. But I want to know is there is a better way to get the same result I got. This is the document without cell borders: I could post the code if necessary. By the way, why should I spend long hours programming these kind of stuff with iText tool when I could do things faster and maybe better looking with iReport? I like iText, it´s just a question. Sorry for my english and thanks!

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• updating multiple nodes in xml with xquery and xdmp:node-replace

  - by morja

  Hi all, I wnat to update an XML document in my xml database (Marklogic). I have xml as input and want to replace each node that exists in the target xml. If a node does not exist it would be great if it gets added, but thats maybe another task. My XML in the database: <user> <username>username</username> <firstname>firstname</firstname> <lastname>lastname</lastname> <email>[email protected]</email> <comment>comment</comment> </user> The value of $user_xml: <user> <firstname>new firstname</firstname> <lastname>new lastname</lastname> </user> My function so far: declare function update-user ( $username as xs:string, $user_xml as node()) as empty-sequence() { let $uri := user-uri($username) return for $node in $user_xml/user return xdmp:node-replace(fn:doc($uri)/user/fn:node-name($node), $node) }; First of all I cannot iterate over $user_xml/user. If I try to iterate over $user_xml I get "arg1 is not of type node()" exception. But maybe its the wrong approach anyway? Does anybody maybe have sample code how to do this?

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• Unable to delete inherited entity class in EF4

  - by Coding Gorilla

  I have two entities in an EF4 model (using Model First), let's call them EntityA and EntityB. EntityA is marked as abstract, and EntityB inherits from EntityA. They are similar to the following: public class EntityA { public Guid Id; public string Name; public string Uri; } public class EntityB : EntityA { public string AnotherProperty; } The generated database tables look as I would expect them, with EntityA as on table, and then another table like: EntityA_EntityB Id (PK, FK, uniqueidentifier) AnotherProperty (varchar) There is a foreign key constraint on EntityA_EntityB that references EntityA's Id property, no cascades are configured (although I did try changing these myself). The problem is that when I attempt to do something like: Context.DeleteObject(EntityA_EntityB); EF attempts to delete the EntityA_EntityB table record before deleting the EntityA table record, which of course violates the foreign key constraint on EntityA_EntityB table. Using EFProfiler I see the following commands being sent to the database: delete [dbo].[EntityA_EntityB] where (([Id] = '5c02899f-09ea-2ed9-d44b-01aef80f6b64' /* @0 */) followed by delete [dbo].[EntityA] where ([Id] = '5c02899f-09ea-2ed9-d44b-01aef80f6b64' /* @0 */) I'm completely stumped as to how to get around this problem. I would think the EF should know that it needs to delete the base class first, before deleting the inherited class. I know I could do some triggers or other database type solutions, but I'd rather avoid doing that if I can. All my classes are POCO built using some customized T4 templates. I don't want to paste in a lot of extraneous code, but if you need more information I'll provide what I can.

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• Creative Technical Interview Questions for Developers

  - by John Shedletsky

  I do a good number of in-person technical interviews for new developers. I like to ask technical questions where I ask people to either code something up or develop an algorithm to solve a task. I feel my current repertoire is uninspired. In my opinion, the ideal interview question has these qualities: Multiple solutions, where some are obviously better than others, and some that involve subtle trade-offs (discussing tradeoffs is a good way to gauge someone's experience, in my opinion). Novelty - asking the "insert this element into a linked list" question is only good for weeding out people who never did their homework. Elegant - I like questions where the core problem isn't hidden in a lot of details. Everyone should be able to understand the problem, even if everyone can't solve it on the whiteboard. Elegant questions are difficult without involving undue amounts of "domain knowledge" or getting too narrow. Have you been on either side of an interview where someone (maybe you!) asked a particularly good programming or algorithms question?

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• Can't get gravity to work with RMagick and 'caption'

  - by mph

  I'm using RMagick 2.12.2 with ImageMagick 6.5.6-10 on Snow Leopard. I'm trying to put captions on a collection of photos, and I'm getting the caption to work (i.e. it appears on the image), but I can't get the gravity parameter to work correctly. No matter what I set it to, I end up with some variation on NorthGravity. For instance: Setting it to SouthWestGravity gives me NorthWestGravity. Setting it to SouthEastGravity gives me NorthEastGravity. Setting it to CenterGravity gives me NorthGravity. In other words, I can't get the caption to come down off the top of the image. I'd consider using "annotate," but I need "caption" so the lengthy caption text for each image will wrap. What am I doing wrong? Here's the code: #!/usr/bin/env ruby require "rubygems" require "yaml" require "RMagick" include Magick base_dir = "/Users/mike/Desktop/caption_test" photo_log = File.open("#{base_dir}/photo_log.yaml" ) YAML::load_documents(photo_log) do |doc| caption = doc["photo-caption"] filename = doc["file"] canvas = ImageList.new.from_blob(open("#{base_dir}/#{filename}") { |f| f.read } ) canvas << Magick::Image.read("caption:#{caption}") { self.gravity = SouthWestGravity self.size = "#{canvas.first.columns}" self.font = "Helvetica Neue" self.pointsize = 12 self.background_color = "#fff" }.first canvas.flatten_images.write("#{base_dir}/images/#{filename}") end

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• Payment Gateways for Mid-Sized Business?

  - by Eric

  My company is a bit unhappy with the support we've been getting from Cybersource and we're about to embark on a billing re-write so we're taking the opportunity to look at other gateways. Anyone have any positive or negative experiences they'd like to share? I'd rather not hear about small website gateways like paypal, we run tens of thousands of transactions and millions a year. If you know, I'd love to hear how much you're paying in transaction/gateway fees too. We're primarily a .NET shop if you'd like to speak to a particular API. Gateway must support the big 4 credit cards (mc, visa, disc, amex) and ACH. Thanks in advance for the help from the hive mind. :)

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• Magento failure.phtml, get the order total

  - by Kieran

  Hello. One of the projects I work on has the failure page and success page in magento as exactly the same and requires some tracking code on both. The tracking code requires the order ID and the amount being ordered. The issue I'm having is trying to get the order total on the failure page. The methods built into the block class Mage_Checkout_Block_Onepage_Failure are getRealOrderId(), getErrorMessage() and getContinueShoppingUrl(), so no help there. I found some code to do what I want on the success page but it doesn't work for the failure page. <?php $orderId = $this->getRealOrderId(); $order = Mage::getSingleton('sales/order'); $order->load($orderId); $_totalData = $order->getData(); $_grand = $_totalData['grand_total']; ?> I dumped $order and $_totalData. $_totalData just an empty array and $order an empty Mage_Sales_Model_Order instance. Does anyone have any suggestions for where to get the grand total of what is being purchased? Regards, Kieran (I'm also having issues testing the success page as I can't get to it, even putting in the correct test card details on the dev server - but I'll find a way around this)

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• What is the purpose of this delegate usage?

  - by Kev

  Whilst poking around some code in .NET Reflector in an app I don't have the source code for I found this: if (DeleteDisks) { using (List<XenRef<VDI>>.Enumerator enumerator3 = list.GetEnumerator()) { MethodInvoker invoker2 = null; XenRef<VDI> vdiRef; while (enumerator3.MoveNext()) { vdiRef = enumerator3.Current; if (invoker2 == null) { // // Why do this? // invoker2 = delegate { VDI.destroy(session, vdiRef.opaque_ref); }; } bestEffort(ref caught, invoker2); } } } if (caught != null) { throw caught; } private static void bestEffort(ref Exception caught, MethodInvoker func) { try { func(); } catch (Exception exception) { log.Error(exception, exception); if (caught == null) { caught = exception; } } } Why not call VDI.destroy() directly. Is this just a way of wrapping the same pattern of try { do something } catch { log error } if it's used a lot?

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• Saving image to the existing file throws "A generic error occurred in GDI+" error.

  - by ryan

  i am trying to create a overlapped image using different images,then saving to a particular location. so that i can use generated image(overlapped img) in my telerik reporting. it is important to me to save the overlapped image to the same location with same name. but generating this overlapped image second time throws throws "A generic error occurred in GDI+" error. Please help me with this. It seems i can not override the existing image file. i tried deleting the existing image every time i generate the new one. but its not allowing me deleting the file ,may be it is used by telerik reporting. Here is the image create method which takes the baseimage path, sectionimage path and the reportimage path (this is the target locationenter code here) public static void Creat(List<string> sectionNames, string reportImagePath, string baseImagePath) { var file = Image.FromFile(baseImagePath); Graphics g = Graphics.FromImage(file); foreach (var sectionName in sectionNames) { var image = Image.FromFile(sectionName); g.DrawImage(image, new PointF(0.0F, 0.0F)); } file.Save(reportImagePath, ImageFormat.Png); file.Dispose(); }

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• How to get MySite navigation bar to show up on a sub-site that is also using the mysite.master page

  - by Terry Barrett

  Hi, We have a created a subsite to the SharePoint 2010 Mysite (used blank site) called "home". This site uses the mysite.master master page. The problem is the top link (navigation) bar from MySite is not showing up on the subsite... Any ideas? If I open the home site in Share Point Designer - the navigation bar does show up... But not in the browser... Any help would be greatly appreciated! Terry

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• Is there a way to create my own "push pins" for a image without using Google Maps API?

  - by Charlie

  I am interested in working with friends via the internet on a fantasy world map. One of the things I want to do is host an image of the map online and allow us to insert push pins into the image that would then be associated with infoboxes. I don't want to resort to using the Google Map APIs mainly because this is something I want to just share among friends and not publicly. Terms of usage for the APIs state we would need to make the implementation available for everyone. This seems simple enough yet I've no idea how to do this. I looked into image maps, but that requires constant updates to the html markup itself. I just want to insert/delete/edit pushpins and infoboxes on the image and through our site itself. Can someone help me get started?

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• Can a database function be called in the predicate of a llblgen query?

  - by Dan Appleyard

  I want to use a table-valued database function in the where clause of a query I am building using LLBLGen Pro 2.6 (self-servicing). SELECT * FROM [dbo].[Users] WHERE [dbo].[Users].[UserID] IN ( SELECT UserID FROM [dbo].[GetScopedUsers] (@ScopedUserID) ) I am looking into the FieldCompareSetPredicate class, but can't for the life of me figure out what the exact signature would be. Any help would be greatly appreciated.

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• Converting C# class to JavaScript

  - by AgileMeansDoAsLittleAsPossible

  Take a look at this basic class: namespace AcmeWeb { public string FirstName { get; set; } public class Person { public Person(string firstName, string lastName) { if (String.IsNullOrEmpty(firstName)) { throw new ArgumentNullException(firstName); } this.FirstName = firstName; } } } What's the best translation of this into JavaScript? This is what I'm thinking: (function(namespace) { namespace.Person = function(firstName, lastName) { // Constructor (function() { if (!firstName) { throw "'firstName' argument cannot be null or empty"; } })(); // Private memberts var _ = { firstName: firstName }; // Public members this.firstName = function(value) { if (typeof(value) === "undefined") { return _.firstName; } else { _.firstName = value; return this; } }; }; })(AcmeWeb);

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• C++ : Lack of Standardization at the Binary Level

  - by Nawaz

  Why ISO/ANSI didn't standardize C++ at the binary level? There are many portability issues with C++, which is only because of lack of it's standardization at the binary level. Don Box writes, (quoting from his book Essential COM, chapter COM As A Better C++) C++ and Portability Once the decision is made to distribute a C++ class as a DLL, one is faced with one of the fundamental weaknesses of C++, that is, lack of standardization at the binary level. Although the ISO/ANSI C++ Draft Working Paper attempts to codify which programs will compile and what the semantic effects of running them will be, it makes no attempt to standardize the binary runtime model of C++. The first time this problem will become evident is when a client tries to link against the FastString DLL's import library from a C++ developement environment other than the one used to build the FastString DLL. Are there more benefits Or loss of this lack of binary standardization?

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• Data Usage Checker Tools

  - by Lucifer

  Hey All, I am about to begin a project for a new client, and am worried about a few things concerning data usage on their internet plan. We're in an area where most of the major networks don't cover the area, and the ones that do, have very expensive plans, with very low data allowance per month. I need to develop an app, but part of the problem lies with checking database values every 30 seconds. It's pretty important that this check is happening every 30 seconds, as the database is actually updated all day everyday, approx. every 5seconds (apparently). Each row in the database consists of about a page full of text if you were to paste it into MS Word. So, are there any logical ways of minimizing data usage in my case, and also how am I able to see exactly how much data is used just to establish a connection to the database? Are there any tools for this kind of info? Thanks :)

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• help with matlab and Discrete Fourier transform

  - by user504363

  Hi all I have previous experience with Matlab, but the problem that I face some problems in apply a problem in (DSP : Digital signal processing) which is not my study field, but I must finish that problems in days to complete my project. all i want is help me with method and steps of solving this problem in matlab and then I can write the code with myself. the problem is about the signal x(t) = exp(-a*t); 1) what's the Discrete Fourier transform of the sampled signal with sample rate fs 2) if a=1 and fs =1 , plot the amplitude spectrum of sampled signal 3) fix the sampling frequency at fs = 1(hz) [what's it mean ?] and plot the magnitude of the Fourier Transform of the sampled signal at various values of a thanks

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• Another Exchange 2003 to Exchange 2010 mail flow issue

  - by Ryan Roussel

  During a migration recently, we came across another internal mail routing issue.  The symptoms were identical to my previous post about Exchange internal mail routing.  Mail was flowing from 2010 to 2003, from 2010 to the internet, but not from 2003 to 2010.   I went through the normal check list looking at permissions, DNS, and the routing group connectors.  I verified that both servers listed in the routing group connectors were the routing master in their respective routing groups through the 2003 ESM.  I also verified that inheritable permissions were enabled for the Exchange 2003 server object in the schema.  No luck with either.   For my previous post about this issue in which inheritable permissions were the culprit: Exchange 2010, Exchange 2003 Mail Flow issue   And for Routing Group issues: Exchange 2007 Routing Group Connector Mayhem   I finally enabled logging on the SMTP virtual server on Exchange 2003 and the Default Receive Connector on 2010 and sent a few test e-mails where I found 2003 was having issues authenticating to 2010.  By default 2003 uses Exchange Server Authentication to communicate to 2010. The exact error was: 4.7.0 Temporary Authentication Failure which was found in the SMTP logs on the Exchange 2003 side   After scouring based on this error, I found the solution:   The Access this computer from the network user rights in the local computer policy on the Exchange 2010 server were changed from the default.  The network administrator had modified the Default Domain policy and changed this user right assignment to only list Domain Users.   The fix was to clear this setting in the Default Domain policy,  force gpupdate to refresh the group policy settings, then ensure the appropriate users and groups were listed.   This immediately fixed the problem and the Exchange 2003 server was able to route mail to the Exchange 2010 mailboxes.   The default user rights assignments for Access this computer from the network On Workstations and Servers: Administrators Backup Operators Power Users Users Everyone On Domain Controllers: Administrators Authenticated Users Everyone More can be found here: http://technet.microsoft.com/en-us/library/cc740196(WS.10).aspx

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• Best Practice: iDRAC & NIC Selection

  - by Josh Brower

  I am setting up a new Dell server with iDRAC 6 Express. My options for the NIC are: 1) Shared 2) Shared with failover to LOM2 3) Shared with failover to all LOMs The server has 2x dual-nic PCI-E cards (total of 4 nics) My questions are thusly: -What is best practice for setting this up? Is there any reason why I would not want option 3? -If the NIC is being used for both iDRAC and the OS, (there is no dedicated iDRAC nic), does this ever cause any kinds of issues for either iDRAC or the OS? Thanks- -Josh

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• Remote reboot of windows to knoppix

  - by user64452

  I am attempting to develop an Auditing application. This audit application will be employed on windows networks. The Audit will need to discover Hardware and software details of all machines attached to the network (including Printers) I do not want to have to install this application on each workstation. The audit app. needs to discover all the ip addresses of all the networked workstations. I have been prototyping this app for the last couple of months and have decided to try a new tack Is this possible? a). You have a windows network, min Windows XP sp3 and upwards b). Maximum of 100 Networked machines (if that matters) c). I need to remotely reboot each WINDOWS machine in turn on the entire network and get it to startup using UNIX, say knoppix for example! d). however the knoppix live cd is only available from one of the networked machines Questions... Morphology? Longevity? Incept dates? Cheers DD

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• (Ubuntu) setuid bash doesn't work

  - by ???

  Here is the code: (root:) # mkdir /test # cp /bin/bash /test/sbash # chmod a+s /test/sbash (user1:) $ cd /test $ ./sbash $ mkdir trycreate mkdir: cannot create directory `trycreate': Permission denied And bash scripts with setuid bit set not work, either. By the way, my setuid perl script works: test.pl: (with setuid bit set, owner=root) #!/usr/bin/perl mkdir('/test/tryperlcreate') or die 'failed'; execute test.pl by user1 will create the directory owned by root.

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• Running a cronjob

  - by Ed01

  've been puzzling over cronjobs for the last few hours. I've read documentation and examples. I understand the basics and concepts, but haven't gotten anything to work. So I would appreciate some help with this total noob dilemma. The ultimate goal is to schedule the execution of a django function every day. Before I get that far, I want to know that I can schedule any old script to run, first once, then on a regular basis. So I want to: 1) Write a simple script (perhaps a bash script) that will allow me to determine that yes, it did indeed run successfully, or that it failed. 2) schedule this script to run at the top of the hour I tried writing a bash script that simple output some text to the terminal: #!/bin/bash echo "The script ran" Then I dropped this into a .txt file MAILTO = *****.******@gmail.com 05 * * * * /home/vadmin/development/test.sh But nothing happened. I'm sure I did many things wrong. Where do I start to fix all of this?

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• Problem with connecting two different networks

  - by tanascius

  I have two networks: 192.168.13.0/24 (blue) and 192.168.15.0/24 (green). Computer A is connected to the 13-net, only. Computer B has two interfaces, one in each network. There is third computer that acts like a router and connects the 13-net to the 15-net (only in this direction). Now, I'd like to ping 192.168.15.100 from computer A to B. Unfortunately there is never a reply. But when I use a hub instead of a switch it works. In my opinion the ping packet travels through the switch to the router (which is the default route/gateway for A). The router sends the packet back to the switch to B. Probably B receives it on its 15-net interface but answers with it's 15th interface? Is this possible? The problem is, that B may have only a gateway 192.168.13.50 - but I am not really sure of it (B is a embedded system with limited configuration possibilities). Can anyone explain what happens here? Thank you!

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• .NET Framework 1.1 on IIS 7

  - by Zack Peterson

  I have inherited a .NET Framework 1.1 web site that I must host with IIS 7 on Windows Server 2008. I'm having some trouble. 1. Installation I installed .NET Framework 1.1 following these instructions. The installation automatically created a new Application Pool "ASP.NET 1.1". I use that. 2. Trouble When I launch the web site I see web.config runtime errors: The tag contains an invalid value for the 'culture' attribute. I fix that one and then see: Child nodes are not allowed. I don't want to keep playing this whack-a-mole game. Something must be wrong. 3. Am I sure this is .NET 1.1? I examine the automatically created application pool. I see that it's 1.1. Advanced Settings... Basic Settings... This doesn't seem right. While 1.1 is set, it's not an option in the Advanced drop down selectors. And why in the Basic box is it just "v1.1" and not ".NET Framework v1.1.4322"? That would be more consistent. 4. I cannot create other .NET 1.1 App Pools I cannot select .NET Framework 1.1 for other application pools. It's not an option in the drop down selectors. What's up with that? What now? Why isn't v1.1 an option for all AppPools? How can I verify my application is in fact using .NET Framework 1.1? Why might I get these runtime errors?

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