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• Dynamic MMap ran out of room when trying to sudo apt-get anything

  - by user1610406

  I was having an error in Update Manager that asks me to do a partial upgrade and it fails. Now I can't sudo apt-get install anything. I tried to fix it, and now I can't sudo apt-get anything. Every time, I get this output: Reading package lists... Error! E: Dynamic MMap ran out of room. Please increase the size of APT::Cache-Limit. Current value: 25165824. (man 5 apt.conf) E: Error occurred while processing libuptimed0 (NewVersion1) E: Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_lucid_universe_binary-i386_Packages W: Unable to munmap E: The package lists or status file could not be parsed or opened. I have no idea why this is happening or how to fix it, and I fear that if I try something that probably doesn't work that it will make my problem worse. (Just for reference I am currently running 10.04 (Lucid) on my machine.)

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• Periodic clicking sound from PC speaker

  - by John J. Camilleri

  After an update some months ago, my laptop has begun making a low, repeated clicking sound every few seconds. It is not being generated through the regular sound system, as altering the volume and even muting the sound does not make any difference. My regular audio works fine, by the way, so I am guessing this is some sort of PC speaker, since I cannot hear the click when I listen through regular headphones. Strangely, when I open the sound settings dialog the click magically disappears. I don't need to change any settings; if I simply leave the dialog open in the background then the problem disappears. Any ideas what this could be? I am running regular Ubuntu 12.04, and this is the output from lspci -v | grep -A7 -i "audio": 00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02) Subsystem: Acer Incorporated [ALI] Device 0349 Flags: bus master, fast devsel, latency 0, IRQ 44 Memory at 54200000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel

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• Drawing an animation over an already drawn screen

  - by Chandan Pednekar

  I am working on a XNA WP7 card game whose basic prototype is complete. In game screen, 6 cards are displayed at a time (3 for each of the two players say 1,2 and 3). If player A attacks one of player B's card then I want to show an animation over player B's card i.e the victim card(say a claw scratch for e.g.) My question is how do I approach with the animation system so that I can draw an animation over a card upon certain events e.g. dead, fire, claw attack etc. I have an attack function which detects which type of card is attacking which type of card. Depending on the type of attacker card I want to display the animation on the victim card. Can I call animation classes function for different animations in the attack function itself without actually having to call separate draw and update functions. If so, how? Also how do I play sound at the same time when the animation is going on?

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• Google's process for publishing/modifying pages [closed]

  - by Glenn Dayton

  I'm assuming that a group of people at Google have control of certain sections of google.com, but how does Google make sure that employees don't accidentally or intentionally sabotage the website? Does Google use Adobe Contribute or some similar product for sharing/publishing the website. Do employees use WebDAV, FTP, SFTP, or SSH to publish the site. Since Google has hundreds of thousands of servers it probably takes some time for its servers to update. Do they transmit the new copy of the website to all servers before publishing at once? This question does not apply to Google editing a database and having a page reflect the database's changes. It applies to employees editing the source code and/ or back end of the site.

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• Best sites to find good .NET Developers

  - by Mag20

  I am looking for good sites to post a position for a .NET developer. I already tried: Craig's list got about 10 resumes, but most couldn't answer our technical questions StackOverflow Careers no responses What sites did you have success with finding good developers? UPDATE 1: Wanted to provide some more information: My company is in NJ. We are a small startup. Less then 10 people. Monster, Dice, CareerBuilder all charge like $500 a month per posting. Seems a bit much. Also only Dice is specifically targeting technical positions. With monster and career builder I am a bit worried about having to go through hundreds of resumes that don't apply.

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• Discussion of a Distributed Data Storage implementation

  - by fegol

  I want to implement a distributed data storage using a client/server architecture. Each data item will be stored persistently in disk in one of several remote servers. The client uses a library to update and query the data, shielding the client from its actual location. This should allow a client to associate keys (String) to values(byte[]), much as a Map does. The system must ensure that the amount of data stored in each server is approximately the same. The set of servers is known beforehand by other servers and clients. Both the client and the server will be written in Java, using sockets, threads, and files. I open this topic with the objective of discussing the best way to implement this idea, assuming simplicity, what are the issues of this implementation, performance measurements and discussion of the limitations.

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• Keeping up with upstream changes while adding small fixes or even major changes

  - by neo

  Often I need to apply some small fixes (to make them run on my environment) or even change some parts of the software (to tailor it to my needs) to software from outside. However this obviously creates problem with updating said software, even when it changes nothing related to my fix. It would be easier when the software provided integration for some kind of plugins but more often than not it doesn't. What would be an ideal workflow regarding that? Most of the projects are git repos I pulled from outside. How should I apply my changes so that I can update painlessly? You can assume that external changes are much more often and larger than my own ones, so reviewing each one of them won't be a solution.

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• Target tracking with a small delay (actionscript 3.0)

  - by John Dodson

  I'm having trouble thinking of a good method to track my character with an enemy attack. Of course, I don't want the attack to track my character's current position; I want it to track where the character was about 1 second before (so you can move around and make the attack miss and loop around you sort of a thing). The general structure of my game uses a timer to update all of my events. I have a timer going off every 25 milliseconds that updates everything, including my player's position and the enemies position. Right now I just have the enemy attack directly targeting my character....which works fine except that it's impossible to escape =p. Let me know if I didn't supply enough details. My approach was going to basically be get my character's position from about 1 second ago, then have the enemy target that position, the only problem is I can't think of a good way to get my character's position from previous times. Thanks for the help!

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• Do web crawlers/spiders index azure web sites?

  - by Clay Shannon

  For somebody who wants their web site to be as discoverable as possible (and who doesn't?), are Microsoft's Azure web sites (azurewebsites.net) a feasible domain to host sites? I have a site that is both on an azurewebsites.net and hosted under a completely different name by discountasp.net Both of these sites are exactly the same, except for the URL; whenever I update the code, I republish the site to/in both places. So obviosuly, they both have the same H1 and H2 elements. Searching for the value/content in my H1 tag, I find my .com site listed #3 on google and #2 on both Bing and Yahoo; OTOH, my azurewebsites.net site doesn't show up on the first page at all, in any of them. This makes me wonder if azurewebsites.net should only be used for Web API hosting and such-like, not for generic/commercial "public" sites. Are my conclusions valid?

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• Is there evidence that linking to quality, reputable and popular website helps with ranking?

  - by JVerstry

  Is there any evidence that linking to external quality, reputable and popular websites helps with ranking (directly or indirectly)? Is there an established correlation? Some posts on the web do claim it, but without providing any evidence. It is known that if your website links to bad neighborhood, this will harm your reputation and authority, but does the reverse actually help? And, does it matter if the website is young or old in this case? Update I have found this Moz video revealing there is a 0.04 correlation with ranking.

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• How do Tortoise svn handle concurrent file updation

  - by sabithpocker

  I don't know much about Tortoise SVN, but have been using it for a while :) I understand that it is capable of managing concurrent users on same file, but how does it do that? I am working on a file that another user is using concurrently and he committed couple of times before me, Now my files doesnt have the changes he made. Every time i end up in such a situation I gets a conflict and I am stuck. So is there something else I should do instead of just committing and causing conflict. Is it safe to do a update first and then commit ? Will I lose my local changes in this case? Please dont beat me up if this is somthing basic, A link to some tutorial will be useful in that case :)

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• Google Maps in .NET Problem

  - by H(at)Ni

  Hello, I've been struggling with Google maps till I found that someone implemented a wrapper so that you can use Google Map as an ASP.Net user control which is a great effort indeed. You can download it from this link. However, after using it for a while, I've found out that it is storing the Google map object only once in the session and getting it from there whenever needed which was a problem for me that when you update the map in some page, you'll find it updated on another page. So, I've digged deep in the code and updated it so that it stores the map object with a unique identifier that you set it as a property in the user control object like that: this.googleMapCtrl.ControlID = Guid.NewGuid().ToString(); You can download the updated control files from here. Cheers,

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• Hidden form and SEO

  - by AntonAL

  I'm using hidden forms, to collects some statistics. Will it have any penalty from search engines ? Update 1: I'm collecting some statistics, based on user interaction with my website. For example, POST requests will be sent to server, when: user stops a playing video user has watched a video till it's end etc. Using form_remote_for in Rails, i'm just rendering the form and keep it invisible. The reason on doing that - is to utilize authencity tokens, and just have less to code. Via JavaScript i'm only filling some hidden fields up and initiating form submission.

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• Is there an easier way to implement 301 redirects when converting a site to WordPress

  - by Amanda

  I have just converted a website to WordPress. The old site has hundreds of hard-coded html files, and the new site does not match the old site's directory structure or file naming system (bad SEO in the original site), so I can't place any "blanket" 301 redirects. Its been at least 2 months, and the old links are still appearing in Google searches, despite a google-friendly sitemap.xml. Do I need to hardcode a 301 for every individual page in my htaccess file, or am I just misunderstanding 301s and apache? Is there some other way I can update Google about the fact that my entire site structure has changed?

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• Big Data Learning Resources

  - by Lara Rubbelke

  I have recently had several requests from people asking for resources to learn about Big Data and Hadoop. Below is a list of resources that I typically recommend. I'll update this list as I find more resources. Let's crowdsource this... Tell me your favorite resources and I'll get them on the list! Books and Whitepapers Planning for Big Data Free e-book Great primer on the general Big Data space. This is always my recommendation for people who are new to Big Data and are trying to understand it....(read more)

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• What are the packages/libraries I should install before compiling Python from source?

  - by Lennart Regebro

  Once in a while I need to install a new Ubuntu (I used it both for desktop and servers) and I always forget a couple of libraries I should have installed before compiling, meaning I have to recompile, and it's getting annoying. So now I want to make a complete list of all library packages to install before compiling Python (and preferably how optional they are). Off the top of my head I can remember these: build-essential (obviously) libz-dev (also pretty common and essential) libreadline-dev (or the Python prompt is crap) But I know there are many more. Please tell me and I'll update.

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• Does dist-upgrade require PPA software to be uninstalled first?

  - by seb

  Hi all, I'm still running Ubuntu 10.04 with quite a few PPAs. Amongst the PPAs there is Guiodic (Guido Iodice) Lucid quasi-rolling :) PPA which brings most recent versions of many programs to my desktop. My steps: sudo update-manager -d click on upgrade on the appearing window wait for the magic to happen: prepare to upgrade and setting new software channels during 'calculating the changes' I will get the following error message in the panel An error occurred, please run Package Manager form the right-click menu or apt-get in a terminal to see what is wrong. The error message was: ' Error: Marking the upgrade (E:Error, pkgProblemResolver::Resolver generated breaks, this may be caused by help packages.)'This usually means that your installed packages have unmet dependencies When I check Synaptic/apt-get I can't find any errors or hint toward broken packages Could this error be because of many PPA versions being newer than 10.04 original versions?

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• HP 510 laptop doesn't suspend when I close the lid

  - by Yuri

  I have an HP 510 laptop with Ubuntu 12.04. I have all the correct settings for suspending when the lid is closed, as far as I can tell, so I think it's a problem with detecting the event. The way it "should" be detected, from what I can see, is a little hardware switch that is pushed when the lid closes. This switch manually puts off the backlight, and sends the suspend signal. All I can think is that the signal isn't being properly interpreted. Can anyone suggest a fix? Update: I tested whether the button was actually working based on the suggestion by josinalvo, and I found that in the directory /proc/acpi/button/lid/ there is no LID directory. There is, however, a C1CF folder, and in it is a state file. When using the this file instead of ID, I discovered that, no, when I close the lid, the state does not change.

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• Tips for communication between JS browser game and node.js server?

  - by Petteri Hietavirta

  I am tinkering around with some simple Canvas based cave flyer game and I would like to make it multiplayer eventually. The plan is to use Node.js on the server side. The data sent over would consists of position of each player, direction, velocity and such. The player movements are simple force physics, so I should be able to extrapolate movements before next update from server. Any tips or best practices on the communications side? I guess web sockets are the way to go. Should I send information in every pass of the game loop or with specified intervals? Also, I don't mind if it doesn't work with older browsers.

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• Software, script or a tool to automate managing which tests to run

  - by laggingreflex

  I have a batch file that lists all the test files I have and asks me which test I want to perform, like Test. [U]nit, [I]ntegration : i (user input) Integration. [A]ll, [2][U]serInteraction, [3][R]esultGeneration : u 2 User Interaction. Running "mocha integration\2userint.js" ... So essentially I have configured a batch "option" for each test file I have, which I can choose to run individually or all together. But adding and removing tests is a pain. I have to update the batch file everytime a new file is added or changed. Is there a software, script or a tool, that does this automatically, or makes it easier for me to do so? I basically need it to be aware of and ask me which file(s) I want to test. A GUI with checkboxes would be ultimate! but I'll take anything. I'm working in node.js

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• Need material for character anatomy in a 2D game. Spartan Like, See Picture

  - by Edwin Soho

  I'm creating my art for an 2d based IOS game. I know some basic anatomy as you can see by the picture but I have no idea how I will make draw the pics for animation of the character walking, attacking with his sword and protecting himself with shield. Is there any anatomy reference for 2d game out there, book or anything else? for your information, I did try to find but all of stuff I found are very amateur and incomplete The picture was my attempt of creating a example of the character walking, which I'm not happy with please help, thanks Update: Since I am in a hurry I decided I would copy the anatomy from other 2d games, it is not that clean but at least I wanna be able to start it. The question is still open.

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• How to cull liquids

  - by Cyral

  I use culling on my Tiles in my 2D Tile Based Platformer, so only ones needed are drawn on screen. Thats easy to do. However, My Liquid tiles (Water, lava, etc) require an Update Method aswell as the normal Draw, which does checks against tiles, makes it flow, etc. So how should I cull liquid updates in my game? Not culling is to slow, culling only on screen looks awkward when you move. What do you think would be best for the player? Maybe someway of culling the visible tiles PLUS also adding the width/height of the viewport to start culling tiles at a fast enough rate in front of the player so it dosent look awkward when moving? (Not sure how to do this though, something with MaxSpeed of player and width of screen)

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• Ubuntu doesn't boot after 11.10 upgrade from 11.04

  - by Gio Borje

  Had this problem earlier: Crash after update to 11.10, from 11.04; ran the solution and had everything updated and upgraded. I get the following lines after booting with some of the preceding start, stop an [OK] lines as the other topic. * Checking battery state... [ 21.640534] btusb_intr_complete: hci0 urb ffff88011e948480 failed to resubmit (19) [ 21.640690] btusb_bulk_complete: hci0 urb ffff88011e948cc0 failed to resubmit (19) [ 21.640734] btusb_bulk_complete: hci0 urb ffff88011e9480c0 failed to resubmit (19) I run tty2 and execute startx to start the GUI that I'm using right now but Ubuntu won't boot without it.

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• What is the name for landing pages that are one long page?

  - by blunders

  Really don't see them much anymore, but here's an example of what I mean: From comments: These are "high pressure" sales pages, design to overload the user with information, sell them on the belief that what they're buying is what they need, normally have a lot of testimonials, highlighted text, etc. The pages I'm talking about are not user friendly, they're aggressive sales pitches designed to target users wanting to belief the webpage they just landed on will solve there problems for an "affordable" price. Here's an example: www_landingpagecashmachine_com (remove the underscores, since I'm attempting to avoid linking to a site like that...) Bonus points: if you're able to tell me the name of the guy/company that popularized these types of pages; recall hearing about his company years ago, after he died in a crash while racing on a track with his Ferrari club on the west coast of the US. (Update: Appears Corey Rudl was the guy's name, and his company was called "The Internet Marketing Center." Even with that info, I've still been unable to find the name for these type of pages.)

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• apt-get not working

  - by Dave Daniels

  Everything I try with apt-get fails. I am installing Ubuntu server for the first time. It is version 12.04 LTS. When I run: apt-get update I get failed to fetch http://gb.whatever goes here...... If I run apt-get install install build-essential I get "unable to locate package build-essential" I have looked at the sources.list but do not know what should and shouldn't be in there. This is the current content of sources.list: # See help.ubuntu.com/community/UpgradeNotes for how to upgrade to # newer versions of the distribution. deb http://gb.archive.ubuntu.com/ubuntu precise main restricted deb-src http://gb.archive.ubuntu.com/ubuntu precise main restricted ## Major bug fix updates produced after the final release of the ## distribution. deb http://gb.archive.ubuntu.com/ubuntu precise-updates main restricted deb-src http://gb.archive.ubuntu.com/ubuntu precise-updates main restricted

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