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• Deleted files not increasing available free space on Ubuntu (as reported by df -h)

  - by Homunculus Reticulli

  I am writing data munging scripts (python and bash), to munge data and import large quantities of text files into a database. I am currently in the test phase, so I am generating several K's of files and deleting them (the files consume about 20G of space). After a test run, I delete the files (sometimes without having imported into the database). I notice that there is a steady decrease in the amount of free space on my disk (as reported by df -h). I don't understand this, as I use rm * (in the data directory), and in the cases where I use Nautilus, I empty the Trash bin as well. Similarly, I notice that when I import the data into the (postgresql) database, and then delete the data from the tables using DELETE FROM tablename;, the size consumed in the postgresql data directory does not go down either. Currently, I have lost approximately 200G from hard drive, and I need to reclaim that - but don't know what to do to reclaim it - any ideas?. I am running Ubuntu 10.0.4 LTS + postgresql 8.4

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• Relative Positions Of Player And Enemy Are Different In XNA 3D Game

  - by CoOlDud3

  I am having a problem in my 3D Jet Fighter Game using XNA. I have a Player Jet and a few enemy drones built from a separate class. The problem is that when I set Player position and a drone's position to a height 10f in y direction. They aren't at the same height. But if i move Drone's Position up 500f in the y direction then it is pretty much close to the player. Relatively They are supposedly at the same height but with different position values. Can Any One Help Please?

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• Combining a content management system with ASP.NET

  - by Ek0nomik

  I am going to be creating a site that seems like it requires a blend of a content management system (CMS) and some custom web development (which is done in ASP.NET MVC). I have plenty of web development experience to understand the ASP.NET MVC side of the fence, but, I don't have a lot of CMS knowledge aside from getting one stood up. Right now my biggest question is around integrating security from ASP.NET with the CMS. I currently have an ASP.NET MVC site that handles the authentication for multiple production sites and creates an authentication cookie under our domain (*.example.com). The page acts like a single sign on page since the cookie is a wildcard and can be used in any other applications of the same domain. I'd really like to avoid having users put in their credentials twice. Is there a CMS that will play well with the ASP.NET Forms Authentication given how I have these existing applications structured? As an aside, right now I am leaning towards Drupal, but, that isn't finalized.

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• Google Chrome Browser does not display the images from Local network or local host? [migrated]

  - by Arjang

  While developing and testing a site on local network I have noticed that while IE/FireFox would display the images coming from URL's like "http:\mypc" or "http:\localhost" or ip adress on the netwrok , google chrome on Galaxy, Windows Machine, or google Android will not display the images. After having burned too many hours trying various CSS, image src tag, html document description tricks, I have given up. During my search I found (and lost) the link to chrome forums regarding this issue that seemed to say it is just so by users. Anyone has any more information on weather it is possible to view images on local host/computer name on netwrok or ip adress?

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• What is the correct frequency of changing content regularly?

  - by SSRB

  What is the correct frequency of changing content regularly? Suppose I have a site "Seven Sea" having 5 links name as Home, About Us, Product, Sitemap, Contact Us. It is good for site to change the site content regularly. But is there is any minimum and maximum frequency for do this job. Suppose I do change my content daily then is that good for SEO point of view. OR suppose I change my content once in a year Is that bad for SEO. What is best or more better choice? A REQUEST: If this type of question already answered then give me that answered link and do not close the question.

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• What am I risking if I don't update my SDK/JDK and bundled runtime/JRE every time there's a security update?

  - by rob

  It seems like there's a new major security hole patched in Java every other week, and I would assume the same goes for other development platforms. After years of frustration trying to get customers to install and configure a compatible JRE on their systems, we started bundling one with our software. (By bundling, I mean we extract a copy of the JRE in our installation directory--we don't install the JRE and configure it as the system default.) The problem is, it's a hassle having to keep that JRE up-to-date because first we have to retest everything to make sure the update didn't break anything (it has broken some of our third-party dependencies in the past). How seriously, if at all, are we putting our customers at risk if we don't update our SDK/JDK and the runtime/JRE that we bundle with our product every time there's a security update? Is it reasonable to just update on a periodic schedule--say, once every 6 months or so?

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• How can I compute the Big-O notation for a given piece of code?

  - by TheNew Rob Mullins

  So I just took a data structure midterm today and I was asked to determine the run time, in Big O notation, of the following nested loop: for (int i = 0; i < n-1; i++) { for(int j = 0; j < i; j++2) { //1 Statement } } I'm having trouble understanding the formula behind determining the run time. I thought that since the inner loop has 1 statement, and using the series equation of: (n * (n - 1)) / 2, I figured it to be: 1n * (n-1) / 2. Thus equaling (n^2 - 1) / 2. And so I generalized the runtime to be O(n^2 / 2). I'm not sure this is right though haha, was I supposed to divide my answer again by 2 since j is being upped in intervals of 2? Or is my answer completely off?

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• Most standard / Best way to keep the same top menu among different web pages?

  - by jsoldi

  What's the standard way to keep the same menu on top among different web pages without having to duplicate it on each page (I don't mean that it doesn't reload like when using frames and only loading the bottom part; I want the menu to scroll with the page when scrolling down, like this, this, this and pretty much every single web page that exists). I found this answer but the guy can't use Php and I can. Plus, I see several people giving different suggestions, but I assume there is a standard since pretty much every single web page in the whole web have a menu on top that stays the same among multiple pages . I'm just a newbie on web design (I can program Php and Html easily but I have no idea about standards and stuff like that since I'm self-taught guy ;)). What I would normally do is to include the menu with php but I'm not sure if this is the "standard".

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• Multiple style sheets best practice

  - by user1145927

  I currently am working on a project which has one large style sheet for about 20 pages. The style sheet contains some styles which are specific for certain pages. I'd like to break the style sheet up so there is one style sheet for each page with one master style sheet that handles everything generic. The reason I want to do this is so people can work on multiple pages without having to worry about who has that large style sheet checked out (I'm using TFS). Is this good practice?

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• XDIME for Mobile Applications

  - by Carlos Gavidia

  I'm involved in a project that requires to mobile-enable some previously developed Portlets. The Portlets are deployed in WebSphere Portal, and the container offers a technology called IBM Mobile Portal Accelerator that uses XDIME to render mobile pages according to the device. I'm trying to document myself in the technology and I'm having a bad time: Google only shows some outdated sites from IBM and even older posts from Volantis, another company involved in the technology (Amazon shows no related books). So... what's the current status of that technology actually? Is has some decent level of adoption?

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• How do you know when to split an object method into 2 or more other methods?

  - by blacktie24

  Hi, I know this is a very basic question, but I sometimes find myself struggling to figure out when to split a single object method into multiple methods. For example, I am trying to set up an ACL using Zend_Acl and Zend_Auth, as shown in this tutorial: http://devzone.zend.com/article/1665. However, I am wondering if the My_Plugin_Auth::preDispatch() method should invoke calls to a method called authenticate() and a method called authorize(), instead of having everything lumped in under preDispatch(). I was thinking that this would make the code more readable and encapsulate the logic into its smaller parts, but i'm not sure if this is reason enough.

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• What would you call the concept of CofeeScript or Sass to be?

  - by MaG3Stican

  There is this rising trend with web development of making new pseudo languages to extend the functionality of JavaScript, CSS and HTML given that those are static and their metamorphosis or evolution is painfully slow due to the variety of browser providers. So I am currently having a concept dilema on how to categorize them for a book I was made to write by my employer as no one seems to have a name for these pseudo languages. A tiny list of them : JavaScript: LiveScript, Metalua, Uberscript, EmberScript. HTML: Razor, Java Scriptlets. CSS : LESS, Sass. I believe the concept of these pseudo languages and a language or an extension of a language is quite different. First these languages do not extend any functionality currently existing on HTML or CSS or JavaScript, they simply work around it. And also they do not "compile" to an intermediate language, they are merely 1-1 translated to something that only then can be compiled. What would you call them?

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• How to bridge the gap between university and job requirements

  - by user1762636

  I study physics and computer science and both studies include minor programming tasks whereas larger tasks are only (potentially) a part of larger projects like for your thesis. When I look at job postings for scientific jobs e.g. in the area of HPC they usually ask for "extensive programming skills in C/C++ and HPC" or the like. This is what I would like to achieve, but frankly I don't know how. I don't mean to mourn, but you can imagine that studying physics/CS means having a busy schedule so I couldn't even work part time as a research assistant to get practice without negative influence on my grades. The second problem is that I lack ideas on what to code in my spare time. I would like to do something useful but even for open source projects you apparently need a whole lot of time and depending on the type of software a lot of experience to be useful. I would be grateful for any advice you can give me.

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• How to limit concurrent file access on a Samba share?

  - by JPbuntu

  I have a Ubuntu 12.04 file server running Samba. There are 6 windows machines that access the server, as well as two people that will occasionally access files remotely. The problem that I am having is that the CAD/CAM software we are using doesn't seem to request file locks, meaning if two people open a file at the same time, the first person to close the file will get their changes overwritten if the second person saves the file. I tried changing the smb.conf to strict locking = yes but this doesn't seem to have any effect. File locking with excel seems to work fine, so I know that Samba is using the file locks...if they were put on the file in the first place. Is there a way (either in Samba or Ubuntu) to only allow one user to have a file open at a time? If not does anyone have any suggestions for managing a problem like this?

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• Installing g77 in Ubuntu 12.04 LTS (32bit)

  - by pksahani

  I am using Ubuntu 12.04 LTS (32bit-i386) in my desktop PC. I need g77 compiler for some specific applications. The app can only be installed after having g77 compiler. This specific app is designed based on g77 fortran compiler and can't be used with gfortran which is the standard available compiler in 12.04 LTS. And guide me the procedure to install g77 in 12.04. I have been trying apt-get update & apt-get install g77 after changing the sources.list file. After processing I am able to install g77 but when i try to compile a fortran program, it shows error /usr/bin/ld: cannot find crt1.o: No such file or directory /usr/bin/ld: cannot find crti.o: No such file or directory /usr/bin/ld: cannot find -lgcc_s collect2: ld returned 1 exit status Please help me. I m struggling a lot to fix this.

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• Single Full Name field in registration form user submits only first what to enter in my backend as last?

  - by Anagio

  On a registration form I have a single input called Full Name. The strings are parsed with http://code.google.com/p/php-name-parser/ so if a person enters their full name middle or any quantity of strings it's handled just fine and the app creates the user in a billing system with it's API. The form validates and checks for two strings in the field otherwise it won't post. I'd like to remove this validation but a last name is required by the API. You cannot post an empty last name to the API. Users are signing up for a trial so I don't want them having to deal with many form fields. The only place the last name shows up visible to the user is in their account settings page. If they end their trial and start a paid plan they'd have to enter their billing details which asks with two fields for their First, Last, and other billing information. What is an alternative to submitting "Doe", "Default", "Empty" in place of them not filling in their last name?

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• GUI won't load, but the desktop background loads. Can't access the terminal

  - by Mickeysofine

  Having trouble with the Ubuntu GUI. I can log in just fine (see this)... everything looks normal there. But as soon as I put in my password, I get this. I tried a few different troubleshooting keyboard commands (ctrl+alt+t, crtl+alt+delete), and only the latter worked. I can interact with that window just fine, except I am unable to resize or move it. The first time I logged in, I got a dialog box that said, "Ubuntu has experienced an internal error. Send error report?" Doesn't say anything now. Yes I tried restarting it. Thanks a bunch, Michael EDIT: Trying to start a guest session leads to the same problem.

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• Partition showing up twice under devices

  - by JohnReed

  I have an ntfs data partition on the same drive as my ubuntu 12.04 partition. I wanted to have this partition automatically mount at startup so that dropbox can start syncing at startup without me having to manually mount it (my dropbox folder is on the partition). I edited the fstab file by appending the following to it: #Data-Partition UUID=762639DE416D0A21 /media/Data ntfs-3g rw,auto,users,exec,nls=utf8,umask=003,gid=46,uid=1000 0 2 The drive now automounts at startup like I wanted, but now I have a duplicate Data entry under my Devices list. This only appeared after editing the fstab file. The second Data entry under Devices does not mount properly and I do not want it there. Why is this duplicate entry there and how can I get rid of it? additional information: Here is the output I get from cat /proc/partitions: major minor #blocks name 8 0 976762584 sda 8 1 102400 sda1 8 2 111574016 sda2 8 3 803643392 sda3 8 4 1 sda4 8 5 55410688 sda5 8 6 6028288 sda6 11 0 1048575 sr0

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• How far can you get in iOS without learning PhotoShop or another graphic design program? [on hold]

  - by Aerovistae

  I'm in the process of learning iOS, and I'm coming from a web dev background where CSS controls 70-90% of the UI, and Python/C++ desktop dev where there are highly customizable UI toolkits for most things. I'm trying to figure out how people make good-looking apps without graphic design skills. You always hear about some 8 year old or 14 year old who made a successful app. So I assume that even if the required code was relatively basic, the app must have looked good if it was a success. But I find it really unlikely that these kids have advanced PhotoShop skills as well as having learned iOS programming at such a young age. Frankly, the same goes for most independent app developers....as they say, unicorns don't exist. So what's the deal? Can you make a good-looking, market quality app without those skills? What are the limitations?

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• category title and affect on SEO and ranking [closed]

  - by Mark

  We are working on a jobs and skills website (similiar to Skill Pages) and are deciding on the names of categories. Rather than having loads of categories and sub-categories like, for example, Builder, Electrician, Carpenter etc, we would like to have more general and easier on the eye category names. So for example we have House, Computer, Education, Art etc. So a builder would be in category House and a few others. Will this style negatively effect our SEO and ranking? And if so, should we abandon and go back to traditional categories and sub-categories?

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• How to properly shield a PO from outside?

  - by xsAce

  Update: We are a very small team (3 people) and thus I (SM) and the PO are also developers doing some coding. We are aware of this situation and we are actively trying to recruit some new talents. But it's hard! Meanwhile... we need to adapt... so my question: The PO complains about having too much outside noise (mainly stakeholders feature requests), and he can't focus on the sprint realisation. We agree that we should try to educate people on our process implications (sprint durations and product backlog), to reduce the noise. But as a ScrumMaster, how am I supposed to shield a PO from outside? Isn't he supposed to be in contact with the management and business? Also, if people outside don't want to waste too much time learning agile, what is the best way to educate them?

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• Issues with external mounting after pysdm removed

  - by K. R. Huard

  So, I'm very new to ubuntu. I was having troubles getting my external hard drive to be read/write permission. It's owner is my macbook, and writing on the drive was repeatedly denied. In trying to sort this out, I tried the Nautilus commands (no success), installed the PYSDM application, changed some things (as suggested by this user in this forum http://askubuntu.com/a/113992 )but then found that I was getting an error message whenever I tried to mount an external storage device. The error is: Unable to mount DERPSTICK error mounting: mount exited with exit code 1: helper failed with: [mntent]: line 14 in etc/fstab is bad mount: only root can mount /dev/sdc1/ on /media/sdc1 Others with similar problems put their fstab up here, but I'm not sure how to bring it up, or if I should even try. Thanks for your time!

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• When do you say "near ID" / "far ID" when using RTMFP in ActionScript 3?

  - by Panzercrisis

  I've been using RTMFP streaming for around a year in ActionScript 3, and I pretty much know the difference between a near ID and far ID. The near ID is your peer ID, and the far ID is the other guy's peer ID. The problem I'm having is that, to my knowledge, choosing whether to use one term or the other in a given sentence is a little like choosing whether to say "go" or "come". In English, "go" and "come" have opposite meanings, but ironically, they can still be used almost interchangeably. It's because whether you're going or coming is so heavily dependent on perspective, as opposed to anything concrete. Is the choice of words between "near ID" and "far ID" just as ambiguous, or is there some sort of method to the madness? Thanks!

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• Anti-depressant and programming

  - by user12358

  I wanted to ask your opinion on anti-depressants, since I took them daily for 3 years now, but I can't be sure if I'm less perfomant with them or without, since I never withdrawed. I'm still at school at the age of 25, still having some motivation problems (for example I can't get used to do something at school if I don't think it will teach me something), but I'm quite motivated to work in the video-game field, since I have some personnal projects in mind. I know C++ programming etc, I'm still learning techniques, but do you think I should try more to do my project instead of just following the work I'm assigned to ? Have you had experience with depression or anti-depressants ? How did it affect your work ? Do you think that being depressed or half-depressed can improve creativity ?

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• Miracles in your work

  - by MobileDev123

  Lot of things has been discussed that can be taken as negative things about programmers, Lets discussed about something good and unexpected happenings in your programmer life... Like: (after R&D of two days and a lot of disappointments ) You just spend an hour with your PM to explain that some feature having some problem and we are unable to release this module in today's beta... after a lot of arguments you are given an hour to make your app work without this module, you sit on your workstation to make a release and all of a sudden you found a silly problem behind that module..... (you solve it and prepare a desired build) did you face miracle (= sudden, positive surprises?) in your life?? what was your reaction in case you have come through such experience?? (N.B. I know my English is not that good and that's why I'm open to every linguistic mistakes needed to be corrected)

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