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• Picasa packages for Ubuntu are no longer available

  - by David

  While trying to install Picasa for Ubuntu, the following errors occurred: wget http://dl.google.com/linux/deb/pool/non-free/p/picasa/picasa_3.0-current_amd64.deb && sudo dpkg -i picasa_3.0-current_amd64.deb --2012-08-30 17:41:36-- http://dl.google.com/linux/deb/pool/non-free/p/picasa/picasa_3.0-current_amd64.deb Resolving dl.google.com (dl.google.com)... 74.125.237.128, 74.125.237.142, 74.125.237.136, ... Connecting to dl.google.com (dl.google.com)|74.125.237.128|:80... connected. HTTP request sent, awaiting response... 404 Not Found 2012-08-30 17:41:36 ERROR 404: Not Found.

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• Innovation for Retailers

  - by David Dorf

  One of my main objectives for this blog is to point out emerging technologies and how they might apply to the retail industry.  But ideas are just the beginning; retailers either have to rely on vendors or have their own lab to explore these ideas and see which ones work.  (A healthy dose of both is probably the best solution.)  The Nordstrom Innovation Lab is a fine example of dedicating resources to cultivate ideas and test prototypes. The video below, from 2011, is a case study in which the team builds an iPad app that helps customers purchase sunglasses in the store.  Customers take pictures of themselves wearing different sunglasses, then can do side-by-side comparisons. There are a few interesting take-aways from their process.  First, they are working in the store alongside employees and customers.  There's no concept of documenting all the requirements then building the product.  Instead, they work closely with those that will be using the app in order to fully understand what's needed.  When they find an issue, they change the software onsite and try again.  This iterative prototyping ensures their product hits the mark.  Feels like Extreme Programming if you recall that movement. Second, they have time-boxed the project to one week.  Either it works or it doesn't, and either way they've only expended a week's worth of resources.  Innovation always entails failure, and those that succeed are often good at detecting failure quickly then adjusting.  Fail fast and fail often. Third, its not always about technology.  I was impressed they used paper designs to walk through user stories and help understand the needs of the customer.  Pen and paper is the innovator's most powerful tool. Our Retail Applied Research (RAR) team uses some of these concepts in our development process.  (Calling it a process is probably overkill.)  We try to give life to concepts quickly so the rest of organization can help us decide if we're heading the right direction.  It takes many failures before finding a successful product.

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• Is there any way to get faster app reviews?

  - by David

  I am trying to build a business around an iPhone app. The app will be our main sales channel, and being able to adapt the sales channel faster than the 9-10 days delay cause by the app review times is crucial. Therefore, I was wondering whether there is anything I can do to improve the speed of reviews. I am thinking that the publishers of Angry Birds, surely would not have to wait in line for reviews on the same terms as some obscure free app. So what can I do? Some things I am considering: Would Apple prioritize apps that they earn money on? Could I in some way pay Apple directly? I already know of the possibility of requesting an expedite review, but it seems like one can get punished for supplying a non-technical reason.

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• Unity on Ubuntu 11.10 - The Dash Home button brings up the panel, but is empty

  - by David M. Coe

  The dash home button brings up a panel that is greyed out, but it is totally empty. It seems to be the very same issue as this: Dash home button brings up blank window which is unanswered. /usr/lib/nux/unity_support_test -p returns OpenGL vendor string: X.Org R300 Project OpenGL renderer string: Gallium 0.4 on ATI RV370 OpenGL version string: 2.1 Mesa 7.11 Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: yes I've tried a unity --reset but that doesn't seem to work. Unity seems to reset, but I get the following warning over and over: cs space validation failed unity What should I do next to try and fix this? Edit: Attempted fixes: I've refomatted, did not work. I've done apt-get remove unity then apt-get update then apt-get install unity, did not work. I've switched to Unity 2d and this seems to work. How can I get regualar Unity working or atleast find the error?

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• SQL language drawbacks, The Third Manifesto

  - by David Portabella

  Sometime ago I read about SQL language drawbacks (the basic language specification, not vendor specific), and one of the drawbacks was that the language does not allow to create a set of tuples that don't come from a table. For instance, SELECT firstName, lastName from people; this creates a set of tuples coming from the table people. Now, if I don't have this table people, and I want to return a constant, I'd need something like this to return a set of two tuples (this would not require to have a table): SELECT VALUES('james', 'dean'), ('tom', 'cruisse'); Why I would need that? Because of the same reasons that we can define constants (not only basic types, but objects and arrays also) in any advanced programming language. Workarounds, Yes, I could create a temporal table, fill the data, and SELECT from that table. This is a hack, to overcome the drawbacks of the poor SQL language. I think that I read about this somewhere in "The Third Manifesto", but I don't find the paragraph/example talking about this concrete drawback anymore. Do you know a reference about it?

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• Listing Desktop Apps in the Windows 8 Store

  - by David Paquette

  So it looks like Microsoft will be allowing publishers to list their desktop apps in the Windows 8 Store.  As per the developer agreement: b. Desktop App Submission. You may submit an app description for one or more desktop apps to the Windows Store. Notwithstanding anything else in this agreement, you understand that Microsoft will not offer any desktop apps through the Store and only Windows Store apps are made available through the Windows Store. Microsoft may, but is not required to, list the desktop app in the Windows Store together with a link you provide, to a website where users can acquire the app. You are solely responsible and agree to maintain that website and provide an updated link to Microsoft if the url changes. Desktop apps are any apps built using APIs other than the APIs for Windows Store apps that run on Windows 8. As the agreement states, Microsoft will not distribute desktop apps through the store, but they will provide a link to a website where users can download your desktop app.  If nothing else, it is a great way to advertise your app.  Hopefully this doesn’t cause any confusion with consumers.  Will end users understand why some apps install automatically while others just send you to a website?

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• tty1 prompt before lightdm

  - by David Weldon

  After upgrading to 13.10, every time I boot I'm shown a login prompt (tty1) for ~30 seconds before lightdm automatically starts. Everything works fine after that. Any ideas on what I could try to fix/debug this? My /var/log/lightdm/x-0-greeter.log contains lines like the following: ** (at-spi2-registryd:1381): WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files ** (at-spi2-registryd:1381): WARNING **: Unable to register client with session manager WARNING: Failed to open sessions directory: Error opening directory '/usr/share/lightdm/sessions': No such file or directory ** Message: PID 1534 (we are 1534) sent signal 15, shutting down... ** (gnome-settings-daemon:1401): WARNING **: Name taken or bus went away - shutting down Searching for these errors results in a variety of bugs filed over the years. Maybe a clean install will fix this.

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• SSH asks for password

  - by user1435470

  I have already : Installed the server Generated the pub/pri keys with -P "" Copied the id_rsa.pub to authorized_keys ssh localhost answered "yes", copied to known_hosts tried ssh localhost still asks for password Output: hduser@hduser1-desktop:~$ ssh -v localhost OpenSSH_5.3p1 Debian-3ubuntu7, OpenSSL 0.9.8k 25 Mar 2009 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to localhost [127.0.0.1] port 22. debug1: Connection established. debug1: identity file /home/hduser/.ssh/identity type -1 debug1: identity file /home/hduser/.ssh/id_rsa type 1 debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048 debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048 debug1: identity file /home/hduser/.ssh/id_dsa type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3p1 Debian- 3ubuntu7 debug1: match: OpenSSH_5.3p1 Debian-3ubuntu7 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.3p1 Debian-3ubuntu7 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host 'localhost' is known and matches the RSA host key. debug1: Found key in /home/hduser/.ssh/known_hosts:3 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password debug1: Next authentication method: publickey debug1: Offering public key: /home/hduser/.ssh/id_rsa debug1: Authentications that can continue: publickey,password debug1: Trying private key: /home/hduser/.ssh/identity debug1: Trying private key: /home/hduser/.ssh/id_dsa debug1: Next authentication method: password Any suggestions ? Cheers

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• Gitosis installation of public key not working...

  - by user29600

  I've been following this tutorial to install and setup git on Ubuntu Server 10.04 using Windows 7 as a client. However, after finally figuring out how it works (executed gitosis-init a bunch of times on the wrong key), I copied the id_rsa.pub file over to the server in /tmp folder and ran it again. Unfortunately it still doesn't work and when I execute git clone [email protected]:gitosis-admin.git it asks for gitosis's password rather than the RSA Passphrase. I'm assuming is the same problem this guy is having here... however, after following his instructions: Purge git-core and gitosis and manually remove the /srv/gitosis folder and following the instructions again (with the proper id_rsa.pub file this time), I'm still having the same issue. Anyone know what I'm doing wrong? Is there any way to probe for more information that might help in solving this?

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• In-Store Tracking Gets a Little Harder

  - by David Dorf

  Remember how Nordstrom was tracking shopper movements within their stores using the unique number, called a MAC, emitted by the WiFi radio in smartphones?  The phones didn't need to connect to the network, only have their WiFi enabled, as most people do by default.  They did this, presumably, to track shoppers' path to purchase and better understand traffic patterns.  Although there were signs explaining this at the entrances, people didn't like the notion of being tracked.  (Nevermind that there are cameras in the ceiling watching them.)  Nordstrom stopped the program. To address this concern the Future of Privacy, a Washington think tank, created Smart Store Privacy, a do-not-track service that allows consumers to register their MAC address in much the same way people register their phone numbers in the national do-not-call list.  A group of companies agreed to respect consumers' wishes and ignore smartphones listed in the database.  The database includes Bluetooth identifiers as well.  Of course you could simply turn your bluetooth and WiFi off when shopping as well. Most know that Apple prefers to use BLE beacons to contact and track smartphones within their stores.  This feature extends the typical online experience to also work in physical stores.  By identifying themselves, shoppers can expect a more tailored shopping experience much like what we've come to expect from Amazon's website, with product recommendations and offers that are (usually) relevant. But the upcoming release of iOS8 is purported to have a new feature that randomizes the WiFi MAC address of smartphones during the "probing" phase.  That is, before connecting to the WiFi network, a random MAC number is used so as to keep the smartphone's real MAC address secret.  Unless you actually connect to the store's WiFi, they won't recognize the MAC address. The details on this are still sketchy, but if the random MAC is consistent for a short period, retailers will still be able to track movements anonymously, but they won't recognize repeat visitors.  That may be sufficient for traffic analytics, but it will stymie target marketing.  In the case of marketing, using iBeacons with opt-in permission from consumers will be the way forward. There is always a battle between utility and privacy, so I expect many more changes in this area.  Incidentally, if you'd like to see where beacons are being used this site tracks them around the world.

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• Are there any free hit counters that don't track users?

  - by David Englund

  Are there any free services that increment a simple hit counter without tracking the users of the site? I would like to know how many visitors there are to my site, excluding bots. I don't need detailed information like unique visitors or where the user is from (in fact, that's exactly what I don't want). I have been researching free hit counters, and it seems that most (all?) of them display advertisements and their terms of service indicate that they can use the data they collect from the client site however they want. Google Analytics also does this and tracks users across sites. The site is static HTML, so an external link or iframe of some sort is easiest for me to implement. I could switch to a Ruby or Node.js back-end, in which case lots of other options open up (like Ruby impressionist and more low-level implementations), but my hosting service is pretty limited. If the answer to my question is simply "no," what are my other options?

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• Game Asset Storage: Archive vs Individual files

  - by David Colson

  As I am in the process of creating a 3D c++ game and I was wondering what would be more beneficial when dealing with game assets with regards to storage. I have seen some games have a single asset file compressed with everything in it and other with lots of little compressed files. If I had lots of individual files I would not need to load a large file at once and use up memory but the code would have to go about file seeking when the level loads to find all the correct files needed. There is no file seeking needed when dealing with one large file, but again, what about all the assets not currently needed that would get loaded with the one file? I could also have an asset file for each level, but then how do I deal with shared assets This has been bothering me for a while so tell me what other advantages and disadvantages are there to either way of doing things.

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• What options do I have for a Wedding Car website? [on hold]

  - by David

  I currently run a Wedding Car website that is ranking in the top 5 for my local area, its not doing so well outside of that. I have listed the company in Google Business so it shows in the SERP and I have a Facebook and Twitter account linked, that I update regularly. I know keeping content fresh is important but nothing much changes so I am unsure what options I have? Should I create a blog and talk about the cars, weddings etc? I am totally unsure where to go with this website, the site currently has a few images and a small amount of text. Things I am considering, but would like advice on: A Mobile version of the website A Blog on the website A gallery page with pictures and descriptions Asking local companies to link to my website Essentially I have a small business website but not much content, because really there isnt! I am looking for long term organic ways to get a good seo rank.

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• Wireless doesn't connect in Ubuntu 10.04 Lxde

  - by David

  Problem I have a Dell mini 9, and the wireless has worked without trouble in Ubuntu and Xubuntu versions 8.04 and 10.04. However, after installing lxde, the wireless doesnt connect. Network manager recognizes the local networks, and will say that it is connected, but ifconfig does not confirm the connection or the existance of a wlan0. I have another Ubuntu 10.04 notebook that works fine. My wireless device is Broadcom BCM4312 802.11b/g What I have tried I have tried to remove and install network-mananager and inxi but neither work, and sudo modprobe wl returns WARNING: All config files need .conf: /etc/modprobe.d/blacklist, it will be ignored in a future release.

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• Is there any way to downgrade or revert an update to the kernel?

  - by David

  Today I installed the linux 3.9 Kernel update (because I heard it would fix sound through HDMI which I no longer have since installing 13.04). After restarted my computer and logging in my screen has only a desktop, and no dock or tool bar. I tried to reset unity and compiz using guides like this one but nothing happens, even after reboot. Is there any way to downgrade or reset the update? EDIT: Running uname -a in terminal brings up 3.8.0 as my current kernel for some reason.

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• jquery ondrag map load only what has not been viewed

  - by David

  When a person mouse down, moves the mouse, and mouses up the system gets the different in the mouse down coord and the mouse up coords and loads in the new map items. However, the problem is it loads them every time so I want a way to track what has been loaded without too much work on checking or storing checks. Most promising. Came up with while typing this. Section the screen into 250x250 sectors and check if that sector has been loaded. Keep track of each corner of the screen and see if there is an area of those that have not loaded. Keep a record of the corners of the screen. When mouse up coords are greater then load the different. Problem is if they are at coord 10,000 then it will load from -10k to 10k positive and that is a lot of items to load. Check every item on the page to see if it is loaded. If I do this I might as well reload the whole page. If anyone has some suggestions; feel free to pass them on.

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• How can I add a new user as sudoer using the command line?

  - by David B

  After I add a user using adduser, I can't see it via System->Administration->Users and Groups unless I logout then login again. Is that normal? Also, can I set a newly added user as a sudoer or do I have to change that only after adding it? How can I do that via the shell? Finally, can I delete the original user that was created upon initial installation of ubuntu, or is this user somehow 'special'?

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• How can I be certain that my code is flawless? [duplicate]

  - by David

  This question already has an answer here: Theoretically bug-free programs 5 answers I have just completed an exercise from my textbook which wanted me to write a program to check if a number is prime or not. I have tested it and seems to work fine, but how can I be certain that it will work for every prime number? public boolean isPrime(int n) { int divisor = 2; int limit = n-1 ; if (n == 2) { return true; } else { int mod = 0; while (divisor <= limit) { mod = n % divisor; if (mod == 0) { return false; } divisor++; } if (mod > 0) { return true; } } return false; } Note that this question is not a duplicate of Theoretically Bug Free Programs because that question asks about whether one can write bug free programs in the face of the the limitative results such as Turing's proof of the incomputability of halting, Rice's theorem and Godel's incompleteness theorems. This question asks how a program can be shown to be bug free.

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• Terrible App Review of the Week&ndash;October 2nd

  - by David Paquette

  As some people know, I have a few apps in the Windows Phone Store.  One of these apps was intended to be a gimmicky app that did NOT really do anything useful.  It was just a funny little app that you probably try it once, then almost immediately uninstall.  To my surprise, this app ended up in some of the Top App lists and actually got a large number of downloads (for the Windows Phone Store).  Along with these downloads came a large number of really terrible and offensive reviews.  People are insulting me and saying awful things that they would never say to someone in person (I hope).  I am ok with this.  I can take the bad reviews and it doesn’t really bother me, but I still think that people are incredibly dis-respectful with their app reviews.  So..I am going to start sharing the best of the worst reviews.  If by chance this is your review, please contact me.  I would love to have a quick chat… Literally THE crappiest app I could of downloaded. You might as well rub dog *** in your eyes..... You'd see more!!! Stan8976   P.S. I am not particularly proud of this app, so I am not going to reveal the name. However, as you see more of these amazing reviews, I think you might be able to guess which app it is.

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• How to CURL and avoid timeout death (Twitter Down) [migrated]

  - by David

  Twitter is down right now, and one of my site's home pages relies on getting data from Twitter (relies is the problem - it should be more of an accessory feature, as it just shows follow count from its feed). Here's the code in question: function socials_Twitter_GetFollowerCount($username) { $method = function () use ($username) { return file_get_contents('https://api.twitter.com/1/users/show.json?screen_name='.$username.'&include_entities=true'); }; $json = cache('bmdtwitter', 3600, $method, false); $json = json_decode($json, true); return intval($json['followers_count']); } What is a good way to make it so if Twitter is down (or not responsive for some reasonable amount of time), our site doesn't appear to be down (I think the timeout maybe defaulting to 30-60 seconds or more).

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• Is JScript dying? If so, where should I go? [closed]

  - by David Is Not Here

  I recently poked around Google for a little bit, looking for information about coding JScript. It's very sparse, which surprised me -- it took a link to a link to find Microsoft's own reference, which appears to omit most if not all references to console-based scripting that extends past Javascript. I'm working with the console here, not a webpage, so input and output seems very different than what Microsoft explains. If JScript is dying (and it appears to be so), where do I go from here? VBScript? My options are limited because the computers I'm using this on are carefully patrolled for new software. JScript's similarity to JavaScript was the biggest reason I had chosen it for porting over some of my prior work. I'm specifically looking for, at best, a console scripting language that doesn't need any extra software on Windows XP or higher, that at least supports standard input, output, pause, and file manipulation, little else.

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• How can an RSA key be placed in a "non-folder"?

  - by Phil

  I lack a lot of knowledge regarding the subject so please excuse me if my question is very ignorant. I just started out with RSA key authentication to my test-server. It did not work at the beginning and I tried and tried and re-tried to no avail. Then I realised, I was creating "mkdir ~/.ssh" and then "mkdir ~/.ssh/authorized_keys" before placing the id_rsa.pub into the latter folder, which did not work. My question is: How can id_rsa.pub be placed in "authorized_keys", which is not created by "mkdir" therefore not a folder? Thank you.

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• SAXException: bad envelope tag

  - by David Guzman

  I'm trying to connect to a webservice https protected through a webservice client. Eclipse generated a stub based webservice client and looks nice to me. The problem comes when I try to call a method from the webservice: String a = (String)webservice.userProfileServices(xml); I'm also using the following SOAP headers: esgGatewayPort = (new EsgGatewayLocator()).getesgGatewayPort(); //setting the authentication header PrefixedQName name = new PrefixedQName("http://schemas.xmlsoap.org/ws/2002/07/secext","Security","wsse"); System.out.println("Setting headers for authentication"); org.apache.axis.message.SOAPHeaderElement sh = new org.apache.axis.message.SOAPHeaderElement(name); SOAPElement sub; try { String clntUserName="myUser"; String clntPassword="myPassword"; sub = sh.addChildElement("UsernameToken"); SOAPElement element = sub.addChildElement("Username"); element.addTextNode(clntUserName); element = sub.addChildElement("Password"); element.addTextNode(clntPassword); ((org.apache.axis.client.Stub) esgGatewayPort).setHeader(sh); } catch (SOAPException e) { e.printStackTrace(); } I receive the following: AxisFault faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException faultSubcode: faultString: org.xml.sax.SAXException: Bad envelope tag: HTML faultActor: faultNode: faultDetail: {http://xml.apache.org/axis/}stackTrace:org.xml.sax.SAXException: Bad envelope tag: HTML at org.apache.axis.message.EnvelopeBuilder.startElement(EnvelopeBuilder.java:71) at org.apache.axis.encoding.DeserializationContext.startElement(DeserializationContext.java:1048) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at weblogic.xml.jaxp.WebLogicXMLReader.parse(WebLogicXMLReader.java:133) at weblogic.xml.jaxp.RegistryXMLReader.parse(RegistryXMLReader.java:153) at javax.xml.parsers.SAXParser.parse(Unknown Source) at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227) at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696) at org.apache.axis.Message.getSOAPEnvelope(Message.java:435) at org.apache.axis.transport.http.HTTPSender.readFromSocket(HTTPSender.java:796) at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:144) at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32) at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118) at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83) at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165) at org.apache.axis.client.Call.invokeEngine(Call.java:2784) at org.apache.axis.client.Call.invoke(Call.java:2767) at org.apache.axis.client.Call.invoke(Call.java:2443) at org.apache.axis.client.Call.invoke(Call.java:2366) at org.apache.axis.client.Call.invoke(Call.java:1812) Any help will be truly appreciated David

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• Page expired issue with back button and wicket SortableDataProvider and DataTable

  - by David

  Hi, I've got an issue with SortableDataProvider and DataTable in wicket. I've defined my DataTable as such: IColumn<Column>[] columns = new IColumn[9]; //column values are mapped to the private attributes listed in ColumnImpl.java columns[0] = new PropertyColumn(new Model("#"), "columnPosition", "columnPosition"); columns[1] = new PropertyColumn(new Model("Description"), "description"); columns[2] = new PropertyColumn(new Model("Type"), "dataType", "dataType"); Adding it to the table: DataTable<Column> dataTable = new DataTable<Column>("columnsTable", columns, provider, maxRowsPerPage) { @Override protected Item<Column> newRowItem(String id, int index, IModel<Column> model) { return new OddEvenItem<Column>(id, index, model); } }; My data provider: public class ColumnSortableDataProvider extends SortableDataProvider<Column> { private static final long serialVersionUID = 1L; private List list = null; public ColumnSortableDataProvider(Table table, String sortProperty) { this.list = Arrays.asList(table.getColumns().toArray(new Column[0])); setSort(sortProperty, true); } public ColumnSortableDataProvider(List list, String sortProperty) { this.list = list; setSort(sortProperty, true); } @Override public Iterator iterator(int first, int count) { /* first - first row of data count - minimum number of elements to retrieve So this method returns an iterator capable of iterating over {first, first+count} items */ Iterator iterator = null; try { if(getSort() != null) { Collections.sort(list, new Comparator() { private static final long serialVersionUID = 1L; @Override public int compare(Column c1, Column c2) { int result=1; PropertyModel<Comparable> model1= new PropertyModel<Comparable>(c1, getSort().getProperty()); PropertyModel<Comparable> model2= new PropertyModel<Comparable>(c2, getSort().getProperty()); if(model1.getObject() == null && model2.getObject() == null) result = 0; else if(model1.getObject() == null) result = 1; else if(model2.getObject() == null) result = -1; else result = ((Comparable)model1.getObject()).compareTo(model2.getObject()); result = getSort().isAscending() ? result : -result; return result; } }); } if (list.size() (first+count)) iterator = list.subList(first, first+count).iterator(); else iterator = list.iterator(); } catch (Exception e) { e.printStackTrace(); } return iterator; } The problem is the following: - I click a column header to sort by that column. - I navigate to a different page - I click Back (or Forward if I do the opposite scenario) - Page has expired. It'd be nice to generate the page using PageParameters but I somehow need to intercept the sort event to do so. Any pointers would be greatly appreciated. Thanks a ton!! David

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• How to limit results in a SharePoint XSL query

  - by David

  Hello all, I am creating a SharePoint site that we will use to report issues with trucks used in our business. Linked to the list I have created will be a page that will display an overview of the trucks and a little truck icon will show the trucks current status. Green and the truck is okay (no open issues), Red and the truck have an open issue with status "Undrivable", Orange and there is two issues open that requires the user to look further into the truck before using it and finally a Gray truck for when there is a new issue created that has not been looked into (not sure if it is drivable or not). I have managed to create the "Dashboard" and with my limit XSL/XPATH knowledge been able to add a truck and replicate the description above but... in my test I have created 4 issues, for example if three of them are changed to status Closed and one left to Undrivable I will get four icons on the page, three with Green trucks and the last one Red. So in theory it works but I obviously only want to see the last truck, one truck. I am not interested in seeing the others. <xsl:template name="dvt_1.rowview"> <xsl:variable name="CountReport" select="count(/dsQueryResponse/Rows/Row[@Highloader='GGEU12' and @Status!='Closed'])" /> <xsl:variable name="MoreThan" select="$CountReport &gt; 1" /> <xsl:variable name="NoReports" select="$CountReport = 0" /> <xsl:variable name="Closed" select=" @Highloader='GGEU12' and @Status='Closed'" /> <xsl:choose> <xsl:when test="$MoreThan"> <div class="ms-vb"><img title='More than one report exist!' border='0' alt='In Progress' src='highloader/Library/hl-orange.png' /></div> </xsl:when> <xsl:otherwise> <div class="ms-vb"><xsl:value-of disable-output-escaping="yes" select="@Icon" /></div> </xsl:otherwise> </xsl:choose> </xsl:template> My hope is that someone with slightly more knowledge can find the last piece of the puzzle for me! Thanks for reading and asking questions to fill any gap I left above. David

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