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• An invalid character was found in text content. Error processing resource

  - by rekhasathvika

  Hi, I got the following error, An invalid character was found in text content. Error processing resource when I dynamically created xml file using php.The encoding I used was utf-8.I changed it to ISO-8859-1.The error resolved.But the issue is I am having tamil,hindi content So it is displayed as à®à®à¯à®°à®¾-à®à¯à®à¯à®à¯- How to solve this? Regards Rekha http://hiox.org

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• Can I use Google's Protocol buffers for processing LDAP requests in my LDAP server?

  - by Naga

  Hi, I need to process the incoming predefined ASN format data(coming from verity of clients that uses BER library to build it) in my application server. This is typically an LDAP server where every request will be in a predefined ASN format. Can i use Google's protocol buffers to process the requests in the server side? Will it help any way to improve performance of my servers request handling? Is it anyway reduce the number of malloc() calls that happens while processing ASN messages? Thanks, Naga

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• Support Vector Machine or Artificial Neural Network for text processing?

  - by Arkid

  We need to decide between Support Vector Machines and Fast Artificial Neural Network for some text processing project. It includes Contextual Spelling Correction and then tagging the text to certain phrases and their synonyms. Which will be the right approach? Or is there an alternate to both of these... Something more appropriate than FANN as well as SVM?

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• Any Open Source Pregel like framework for distributed processing of large Graphs?

  - by Akshay Bhat

  Google has described a novel framework for distributed processing on Massive Graphs. http://portal.acm.org/citation.cfm?id=1582716.1582723 I wanted to know if similar to Hadoop (Map-Reduce) are there any open source implementations of this framework? I am actually in process of writing a Pseudo distributed one using python and multiprocessing module and thus wanted to know if someone else has also tried implementing it. Since public information about this framework is extremely scarce. (A link above and a blog post at Google Research)

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• What kind of data processing problems would CUDA help with?

  - by Chris McCauley

  Hi, I've worked on many data matching problems and very often they boil down to quickly and in parallel running many implementations of CPU intensive algorithms such as Hamming / Edit distance. Is this the kind of thing that CUDA would be useful for? What kinds of data processing problems have you solved with it? Is there really an uplift over the standard quad-core intel desktop? Chris

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• How to create a custom Annotation and processing it using APT ?

  - by Dhana

  Hi, I'm new to Java Annotation. I know how to create custom annotation but I don't know how to process that Annotation to generate the dynamic code just like ejb 3.0 and hibernate does. I read some articles based on APT but no one gives the details about how to process the Annotation. Are there any tutorials with sample code for processing custom Annotations? Thanks

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• What java apis are there to help with annotation processing by using reflection?

  - by Darran

  Hi, I`m looking to start project that needs to process annotations. I was wondering what apis are available to help with reflection and annotation processing. I know theres Apache BeanUtils but are there any others?

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• gracefully stopping a windows service with mutlithreaded processing on a timer thread?

  - by nitroxn

  Hi, Any ideas on gracefully stopping a windows service with mutli-threaded processing on a timer thread? Is it possible to add some infinite loop logic in the OnStop method to postpone the service shutting down.

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• Need to run a processing demanding application on a .NET server.... any tips?

  - by mouthpiec

  Hi, I need to run an image processing application on a .NET server. Do you have any tips what I should/can do? I implemented the code in a webservice, but performance is very slow (at least 10x slower than when executed in a windows application). Any help will be greatly appreciated. thanks

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• ImageMagick is not processing images, but gives no errors.

  - by Trip

  My problem is is that paperclip saves the attachments appropriately, and I assume imagemagick is doing something right. With no errors returning, the images never finish processing. Does anyone know a way to see what's backgrounding? Or specifically a way to review imagemagick's processes?

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• render (and redirect_to) should somehow terminate the processing of an action?

  - by piemesons

  def update @user = User.find(params[:id]) if @user.update_attributes(params[:user]) render :action => show end render :template => "fix_user_errors" end The previous code will generate an error (because render is called twice) in the case where update_attributes succeeds. The act of calling render (and redirect_to) should somehow terminate the processing of an action?But its not why?

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• Can't upgrade my Ubuntu server, it gets stuck on openjdk-6-jre-headless

  - by Jean-Nicolas Boulay Desjardins

  I am using Ubuntu Server. When I do: apt-get upgrade it gets stuck on: Setting up openjdk-6-jre-headless (6b20-1.9.7-0ubuntu1) ... Why? And what can I do to stop it? I tried removing it with apt-get... I get this error: E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem. So then I tried this: dpkg --purge openjdk-6-jre-headless I got this: dpkg: dependency problems prevent removal of openjdk-6-jre-headless: openjdk-6-jre-lib depends on openjdk-6-jre-headless (>= 6b17). ca-certificates-java depends on openjdk-6-jre-headless (>= 6b16-1.6.1-2) | java6-runtime-headless; however: Package openjdk-6-jre-headless is to be removed. Package java6-runtime-headless is not installed. Package openjdk-6-jre-headless which provides java6-runtime-headless is to be removed. ca-certificates-java depends on openjdk-6-jre-headless (>= 6b16-1.6.1-2) | java6-runtime-headless; however: Package openjdk-6-jre-headless is to be removed. Package java6-runtime-headless is not installed. Package openjdk-6-jre-headless which provides java6-runtime-headless is to be removed. dpkg: error processing openjdk-6-jre-headless (--purge): dependency problems - not removing Errors were encountered while processing: openjdk-6-jre-headless The thing is I think my DB is using it... Not sure... I am using Cassandra with Thrift... Yes, it's getting a bit more complex... # dpkg --configure -a I get: dpkg: dependency problems prevent configuration of openjdk-6-jre: openjdk-6-jre depends on openjdk-6-jre-headless (>= 6b20-1.9.7-0ubuntu1); however: Package openjdk-6-jre-headless is not configured yet. dpkg: error processing openjdk-6-jre (--configure): dependency problems - leaving unconfigured Processing triggers for libc-bin ... ldconfig deferred processing now taking place dpkg: dependency problems prevent configuration of libaccess-bridge-java: libaccess-bridge-java depends on default-jre | openjdk-6-jre | sun-java6-jre; however: Package default-jre is not installed. Package openjdk-6-jre is not configured yet. Package sun-java6-jre is not installed. dpkg: error processing libaccess-bridge-java (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of icedtea-6-jre-cacao: icedtea-6-jre-cacao depends on openjdk-6-jre-headless (= 6b20-1.9.7-0ubuntu1); however: Package openjdk-6-jre-headless is not configured yet. dpkg: error processing icedtea-6-jre-cacao (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of libaccess-bridge-java-jni: libaccess-bridge-java-jni depends on libaccess-bridge-java (>= 1.26.2-5); however: Package libaccess-bridge-java is not configured yet. dpkg: error processing libaccess-bridge-java-jni (--configure): dependency problems - leaving unconfigured Errors were encountered while processing: openjdk-6-jre libaccess-bridge-java icedtea-6-jre-cacao libaccess-bridge-java-jni Thanks again for any help.

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• Google Chrome installation error

  - by PlinioSantos

  I used to use google chrome as default browser. One day I tried to use Google Cast extension to send my browser screen to chromecast, but I realized that my Chrome version was old. So I downloaded the debian package from google web site, but I ran on a dependency failure: $ sudo dpkg -i /home/plinio/Downloads/google-chrome-stable_current_amd64.deb (Reading database ... 195156 files and directories currently installed.) Preparing to replace google-chrome-stable 35.0.1916.114-1 (using .../google-chrome-stable_current_amd64.deb) ... Unpacking replacement google-chrome-stable ... dpkg: dependency problems prevent configuration of google-chrome-stable: google-chrome-stable depends on libnss3 (>= 3.14.3); however: Version of libnss3 on system is 3.14.1-0ckbi1.93ubuntu.0.12.04.1. dpkg: error processing google-chrome-stable (--install): dependency problems - leaving unconfigured Processing triggers for man-db ... Processing triggers for desktop-file-utils ... Processing triggers for bamfdaemon ... Rebuilding /usr/share/applications/bamf.index... Processing triggers for gnome-menus ... Errors were encountered while processing: google-chrome-stable How to solve it? I had no success with Synaptc and Ubuntu Software Center as well.

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• Unable to install Google Chrome

  - by Jordan

  I receive this in my terminal when I try to install using wget https://dl.google.com/linux/direct/google-chrome-stable_current_i386.deb sudo dpkg -i google-chrome* or sudo dpkg --install /Path/to/chrome.deb I receive Selecting previously unselected package google-chrome-stable. (Reading database ... 146911 files and directories currently installed.) Unpacking google-chrome-stable (from google-chrome-stable_current_i386.deb) ... dpkg: dependency problems prevent configuration of google-chrome-stable: google-chrome-stable depends on xdg-utils (>= 1.0.2). dpkg: error processing google-chrome-stable (--install): dependency problems - leaving unconfigured Processing triggers for man-db ... Processing triggers for bamfdaemon ... Rebuilding /usr/share/applications/bamf.index... Processing triggers for desktop-file-utils ... Processing triggers for gnome-menus ... Errors were encountered while processing: google-chrome-stable I then type sudo apt-get install -f And retry installation though it still does not install and I receive the same errors. I have also tried using: sudo apt-get install libxss1 libnspr4-0d libcurl3 Though the above doesn't work either.

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• Unable to uninstall maas completely

  - by user210844

  I'm not able to uninstall MAAS sudo apt-get purge maas ; sudo apt-get autoremove Reading package lists... Done Building dependency tree Reading state information... Done Package 'maas' is not installed, so not removed 0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded. 2 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Setting up maas-region-controller (1.2+bzr1373+dfsg-0ubuntu1) ... Considering dependency proxy for proxy_http: Module proxy already enabled Module proxy_http already enabled Module expires already enabled Module wsgi already enabled sed: -e expression #1, char 91: unterminated `s' command dpkg: error processing maas-region-controller (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of maas-dns: maas-dns depends on maas-region-controller (= 1.2+bzr1373+dfsg-0ubuntu1); however: Package maas-region-controller is not configured yet. dpkg: error processing maas-dns (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already Errors were encountered while processing: maas-region-controller maas-dns E: Sub-process /usr/bin/dpkg returned an error code (1) Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded. 2 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Setting up maas-region-controller (1.2+bzr1373+dfsg-0ubuntu1) ... Considering dependency proxy for proxy_http: Module proxy already enabled Module proxy_http already enabled Module expires already enabled Module wsgi already enabled sed: -e expression #1, char 91: unterminated `s' command dpkg: error processing maas-region-controller (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of maas-dns: maas-dns depends on maas-region-controller (= 1.2+bzr1373+dfsg-0ubuntu1); however: Package maas-region-controller is not configured yet. dpkg: error processing maas-dns (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already Errors were encountered while processing: maas-region-controller maas-dns E: Sub-process /usr/bin/dpkg returned an error code (1)

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• unable to install anything that depends upon spamassassin. Cant even install spamassasin

  - by Harbhag

  I am trying to install mailscanner using apt-get install mailscanner and I got the following error Setting up spamassassin (3.3.1-1) ... Starting SpamAssassin Mail Filter Daemon: child process [21344] exited or timed out without signaling production of a PID file: exit 255 at /usr/sbin/spamd line 2588. invoke-rc.d: initscript spamassassin, action "start" failed. dpkg: error processing spamassassin (--configure): subprocess installed post-installation script returned error exit status 255 dpkg: dependency problems prevent configuration of mailscanner: mailscanner depends on spamassassin (>= 3.1); however: Package spamassassin is not configured yet. dpkg: error processing mailscanner (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: spamassassin mailscanner E: Sub-process /usr/bin/dpkg returned an error code (1) and when I tried to install spamassassin I got the following error : Setting up spamassassin (3.3.1-1) ... Starting SpamAssassin Mail Filter Daemon: child process [21389] exited or timed out without signaling production of a PID file: exit 255 at /usr/sbin/spamd line 2588. invoke-rc.d: initscript spamassassin, action "start" failed. dpkg: error processing spamassassin (--configure): subprocess installed post-installation script returned error exit status 255 dpkg: dependency problems prevent configuration of mailscanner: mailscanner depends on spamassassin (>= 3.1); however: Package spamassassin is not configured yet. dpkg: error processing mailscanner (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: spamassassin mailscanner E: Sub-process /usr/bin/dpkg returned an error code (1) I am using Ubuntu Server 10.04

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• Firefox dependencies problem on 12.10

  - by theshu

  I did a fresh install of Ubuntu 12.10 today and now am getting the following error: You might want to run 'apt-get -f install' to correct these. The following packages have unmet dependencies: firefox-globalmenu : Depends: firefox (= 17.0.1+build1-0ubuntu0.12.10.1) but 16.0.1+build1-0ubuntu1 is installed E: Unmet dependencies. Try using -f. When I run the sudo apt-get -f install...I get the following after I type the "y": (Reading database ... 179765 files and directories currently installed.) Preparing to replace firefox 16.0.1+build1-0ubuntu1 (using .../firefox_17.0.1+build1-0ubuntu0.12.10.1_i386.deb) ... Unpacking replacement firefox ... dpkg-deb (subprocess): decompressing archive member: internal gzip read error: '<fd:4>: incorrect data check' dpkg-deb: error: subprocess <decompress> returned error exit status 2 dpkg: error processing /var/cache/apt/archives/firefox_17.0.1+build1-0ubuntu0.12.10.1_i386.deb (--unpack): cannot copy extracted data for './etc/apparmor.d/usr.bin.firefox' to '/etc/apparmor.d/usr.bin.firefox.dpkg-new': unexpected end of file or stream Please restart all running instances of firefox, or you will experience problems. Processing triggers for bamfdaemon ... Rebuilding /usr/share/applications/bamf.index... Processing triggers for desktop-file-utils ... Processing triggers for gnome-menus ... Processing triggers for man-db ... Errors were encountered while processing: /var/cache/apt/archives/firefox_17.0.1+build1-0ubuntu0.12.10.1_i386.deb E: Sub-process /usr/bin/dpkg returned an error code (1) This error is preventing me from installing Synaptic package manager and is also preventing me from installing anything with the Software center or Update manager. I tried uninstalling Firefox and also upgrading Firefox to no avail as well. Open to suggestions.

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• Force apt to remove all emacs*

  - by wishi

  Hi! I have a bug-problem with the apt-packages of emacs: >>Error occurred processing debian-ispell.el: File error (("Opening input file" "no such file or directory" "/usr/share/emacs23/site-lisp/dictionaries-common/debian-ispell.el")) >>Error occurred processing ispell.el: File error (("Opening input file" "no such file or directory" "/usr/share/emacs23/site-lisp/dictionaries-common/ispell.el")) >>Error occurred processing flyspell.el: File error (("Opening input file" "no such file or directory" "/usr/share/emacs23/site-lisp/dictionaries-common/flyspell.el")) emacs-install: /usr/lib/emacsen-common/packages/install/dictionaries-common emacs23 failed at /usr/lib/emacsen-common/emacs-install line 28, <TSORT> line 30. dpkg: error processing emacs23-lucid (--configure): subprocess installed post-installation script returned error exit status 1 dpkg: dependency problems prevent configuration of emacs: emacs depends on emacs23 | emacs23-lucid | emacs23-nox; however: Package emacs23 is not installed. Package emacs23-lucid which provides emacs23 is not configured yet. Package emacs23-nox which provides emacs23 is not installed. Package emacs23-lucid is not configured yet. Package emacs23-nox is not installed. dpkg: error processing emacs (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: emacs23-lucid emacs E: Sub-process /usr/bin/dpkg returned an error code (1) In fact I would be satisfied with just emacs23-nox, a couple of plugins - from apt. But I can neither --purge nor --purge reinstall, nor remove the packages. It always processes until this certain bug. I did some google-searching, found some stuff on Launchpad suggesting: sudo apt-get install --reinstall --purge emacsen-common But this is the same... so I hope there a way to tell app to just remove everything releated to emacs, and to start from scratch again? Thanks, Marius

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• How to force remove a package if dpkg removal script fails?

  - by fodon

  I'm trying to remove a package where I deleted the /etc/init.d/disco-master file (in an attempt to remove the package manually). I want to remove the disco-master package. How do I do this now? This is what happens when I do sudo apt-get remove disco-master: removing disco-master ... invoke-rc.d: unknown initscript, /etc/init.d/disco-master not found. dpkg: error processing disco-master (--remove): subprocess installed pre-removal script returned error exit status 100 Errors were encountered while processing: disco-master E: Sub-process /usr/bin/dpkg returned an error code (1) When I do sudo apt-get install --reinstall disco-master I get the following: You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: disco-master : Depends: disco-node (= 0.4.2+nmu1) but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). When I do sudo apt-get -f install I get this: Unpacking disco-node (from .../disco-node_0.4.2+nmu1_amd64.deb) ... dpkg: error processing /var/cache/apt/archives/disco-node_0.4.2+nmu1_amd64.deb (--unpack): trying to overwrite '/usr/lib/disco/master/ebin/disco.app', which is also in package disco-master 0.4.1 No apport report written because MaxReports is reached already dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Errors were encountered while processing: /var/cache/apt/archives/disco-node_0.4.2+nmu1_amd64.deb E: Sub-process /usr/bin/dpkg returned an error code (1) When I run sudo apt-get remove disco-node I get the following: Package disco-node is not installed, so not removed You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: disco-master : Depends: disco-node (= 0.4.1) but it is not going to be installed Depends: python-disco (= 0.4.1) but 0.4.2+nmu1 is to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). When I did sudo dpkg -P --force-all disco-master I got: Removing disco-master ... invoke-rc.d: unknown initscript, /etc/init.d/disco-master not found. dpkg: error processing disco-master (--purge): subprocess installed pre-removal script returned error exit status 100 Errors were encountered while processing: disco-master

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• Ensure Payroll Success with PeopleSoft Year-End Training for U.S. and Canada

  - by Breanne Cooley

  Year-end payroll processing and reporting is a requirement for your business. If you're responsible for completing these processes in either Canada or the United States using the PeopleSoft Payroll application, and if you're new to PeopleSoft Payroll or to performing these processes, consider enrolling in Oracle University's expert training. Our PeopleSoft Payroll specialists will guide you through the necessary steps to ensure you can smoothly and successfully perform your job. Training is specific to the country for which you are performing the processing and reporting. Training lasts one day and is delivered in our Live Virtual Class Format, which helps you avoid travel during this busy season. Here's the training we recommend: PeopleSoft Year-End Payroll - U.S. This course teaches you how to complete U.S. year-end processing and reporting using PeopleSoft Payroll for North America, step-by-step. Update tax reporting setup tables and update employees' income and tax records. Load each employee's year-end data into a single year-end record for processing and reporting.  Identify reports needed to reconcile the year-end data. Correct tax balances and other data as necessary. Generate final print and online W-2 forms and prepare the electronic file for the Social Security Administration.  Enter corrected W-2 information and print a W-2c form. Report periodic retirement distributions and related tax withholding amounts on form 1099-R.   Please Note: this course is intended for organizations using PeopleSoft release 8.81 or higher. PeopleSoft Year-End Payroll – Canada This course covers the steps necessary to perform Canadian year-end processing using Oracle's PeopleSoft Payroll for North America. Explore adjustments, balances, year-end slip processing, common pitfalls and errors and balancing reports.  Produce accurate year-end reporting results such as T4, T4A, RL-1 and RL-2.  Please Note: this course is intended for organizations using PeopleSoft release 8.81 or higher. See you in class! -Oracle University Marketing Team 

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• E: Sub-process /usr/bin/dpkg returned an error code (1)

  - by kss

  sudo apt-get install acroread, i got the following output Reading package lists... Done Building dependency tree Reading state information... Done Suggested packages: libldap2 libgnome-speech7 The following NEW packages will be installed: acroread 0 upgraded, 1 newly installed, 0 to remove and 6 not upgraded. 1 not fully installed or removed. Need to get 0 B/60.1 MB of archives. After this operation, 142 MB of additional disk space will be used. (Reading database ... 237901 files and directories currently installed.) Unpacking acroread (from .../acroread_9.5.1-1precise1_i386.deb) ... dpkg: error processing /var/cache/apt/archives/acroread_9.5.1-1precise1_i386.deb (--unpack): failed in write on buffer copy for backend dpkg-deb during `./opt/Adobe/Reader9/Browser/intellinux/nppdf.so': No space left on device No apport report written because MaxReports is reached already dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Processing triggers for bamfdaemon ... Rebuilding /usr/share/applications/bamf.index... Processing triggers for desktop-file-utils ... Processing triggers for gnome-menus ... Processing triggers for man-db ... /usr/bin/mandb: can't write to /var/cache/man/1645: No space left on device Errors were encountered while processing: /var/cache/apt/archives/acroread_9.5.1-1precise1_i386.deb E: Sub-process /usr/bin/dpkg returned an error code (1)

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• Grub2 mutual dependency issue

  - by A T

  For various reasons I am installing .deb dependencies for grub2 using dpkg directly (rather than apt-get). root@ubuntu:/dl# dpkg -i grub-gfxpayload-lists_0.6_amd64.deb Selecting previously unselected package grub-gfxpayload-lists. (Reading database ... 249808 files and directories currently installed.) Preparing to unpack grub-gfxpayload-lists_0.6_amd64.deb ... Unpacking grub-gfxpayload-lists (0.6) ... dpkg: dependency problems prevent configuration of grub-gfxpayload-lists: grub-gfxpayload-lists depends on grub-pc (>= 1.99~20101210-1ubuntu2); however: Package grub-pc is not configured yet. dpkg: error processing package grub-gfxpayload-lists (--install): dependency problems - leaving unconfigured Processing triggers for man-db (2.6.7.1-1) ... Errors were encountered while processing: grub-gfxpayload-lists By configure I assume it means install+configure, so I tried: root@ubuntu:/dl# dpkg -i grub-pc_2.02~beta2-9_amd64.deb (Reading database ... 249818 files and directories currently installed.) Preparing to unpack grub-pc_2.02~beta2-9_amd64.deb ... Unpacking grub-pc (2.02~beta2-9) over (2.02~beta2-9) ... dpkg: dependency problems prevent configuration of grub-pc: grub-pc depends on grub2-common (= 2.02~beta2-9); however: Package grub2-common is not installed. grub-pc depends on grub-pc-bin (= 2.02~beta2-9); however: Package grub-pc-bin is not installed. grub-pc depends on grub-gfxpayload-lists; however: Package grub-gfxpayload-lists is not configured yet. dpkg: error processing package grub-pc (--install): dependency problems - leaving unconfigured Processing triggers for man-db (2.6.7.1-1) ... Errors were encountered while processing: grub-pc How do I solve this problem?

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• Is it possible to intercept an HTML form post and do some processing before sending it to it's final

  - by Brent

  I'm trying to extend the functionality of an ASP.net application that I'm working with. For its logon page, it uses an html form to post to a dll to handle it's login logic. I'm wondering if there is any way to redirect that html POST to my C# code so that I can do some processing and then (and this is the part that I haven't figured out yet) POST it to the dll so that the regular logon logic can continue. I can make changes to the logon page, but the final step must be to do an HTML POST to the dll. I can't change that.

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• How to show an animated spinner while a background task is processing in nested rails model using aj

  - by Globalkeith

  My specific example is highly complex, so I will use the example shown by Ryan from Railscasts to discuss this: http://railscasts.com/episodes/197-nested-model-form-part-2 Background I have a form, let's say "Survey", which contains an arbitrary number of "Questions". Senario Give i am on the "Edit Survey" page. I would like to add a button to each "Question" field which calls a remote_function, which in turn queue's up a delayed_job to execute some processing on the "Question". To give feedback to the user, i would like to disable the button, and show an animated spinner, which remains until the delayed_job has processed the "Question". Hint - I can add methods to the "Question" model to indicate the status of the delayed_job. So, with best practices in mind, what is the best way to achieve this?

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• how can I design a good architechture for a Transaction Processing System?

  - by ghedas

  I have a project that must design an architecture for it. This project is a something like a Transaction Processing system and I need to know something like this: when and where I must use synchronous and asynchronous relations between its components? If always I use synchronous relations, the amount of messages maybe become exceeded and makes problem for TP system, and on the other hand synchronous relations make lots of delay, I think a mixture of them is required! If other parameters required to considering please help me! the most nonfunctional requirements of this project are performance and availability of it. I need useful materials and suggestions for it.

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