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• Good book about advanced programming techniques [closed]

  - by Luca

  I am looking to a book covering adavnced programming techniques, covering different practical scenarios and describing the different challanges with the relative solutions. As example, which are the best ways to implement a module for buying on a web application with credit card or how to manage responsivenes for the frontend of the web application itself (dealing with cache, optimeze plugins, etc). On the web there are tons of tutorials about these topics, but I am looking for a book where such cases are collected all together and treated by real professionists. If the book would provide some code samples, that would be a plus (especially if C# .NET), but I am more interested in the approach/solution rather than the code details. I could not find any of these cases in the general book about programming, therefore I hope someone might point me in the right direction. EDIT: I have 4 years experience as web developer, mainly with Microsoft (C#, ASP.NET, SQL Server) and client side technologies (jQuery, HTML/CSS).

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• Sound issues in 14.4

  - by RMartinezG

  God Day. This is my first day with you people so please acept my apologies whether something is not good enough or my english is no that good. To the point ------------------------------------------ After upgrading from 13.10 to 14.4 my sound was lost. Even I've tryied several sugestions from you (and other helpers) I've got nothing. My dual (UBUNTU/WINDOWS) Desktop sound works fine in windows!!!(damm!!) my DELL Inspiration laptop sound works fine in UBUNTU 14.4 LTS. ¿?¿? Do anybody knows Which is actually the origin of the problem? Is there any solution diferent to assay-error metodology? Is'nt every newer version of UBUNTU enough double checked before releasing it? Thanks for youo help sudo apt-get install -a indulgence_with_me

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• Google se lance dans les solutions de géolocalisation en temps réel pour les entreprises, mais uniquement sur Android

  Google se lance dans les solutions de géolocalisation en temps réel Pour les entreprises, mais uniquement sur Android « Imaginez : vous êtes un opérateur pour un fournisseur d'électricité. Vous recevez un appel concernant une panne électrique et vous devez rapidement dépêcher sur place un de vos techniciens. Google Maps Coordinate peut vous aider ». Voici comment Google présente son nouveau service aux entreprises déclinés des Google Maps. Cette solution à la croisée de la géolocalisation en temps réel et des smartphones sort au moment où cabinet d'études IDC estime qu'il y aura plus de 1,3 milliard de travailleurs mobiles d'ici 2015 (soit 37,2% des employés au total).

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• MonoDevelop 2.4 released

  Today we are releasing MonoDevelop 2.4, which includes plenty of new features and improvements. The release highlights are: Workbench usability improvements, which include a new Navigate to Symbol dialog, Solution and Class pad zooming, better pad layout, and many other look & feel improvements. Improvements in project management, with support for standalone assembly projects, and external console support for Windows and Mac. Extensive text editor improvements, including in-line search,...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Laptop battery sometimes does not charge?

  - by user1880405

  So on my Asus K56C laptop running Ubuntu 14.04 (was same problem in 13.10) I got a problem that from time to time after I use laptop without cable (just on battery) it stops charging with cable. I can still use laptop indefinitely on cable, but it's not charging. The only solution is to remove and reinsert the battery, then it will charge. Now I wonder how does laptop 'knows' that battery was reinserted, and is it possible to simulate that from Ubuntu, maybe some command which refreshes battery? P.s.: this is not happening on Windows 8.1.

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• File recovery of windows after installing ubuntu

  - by user282619

  In one of my computers I installed ubuntu 14.04. Actually , I tried to dual-boot in along with windows 7 and I tried to do the partition during the ubuntu installation procedure. Now all of my 500 GB hard disk has been occupied by ubuntu and I cannot access windows. Since, I have all my documents in windows and I want to recover it. Will I be able to recovery my files of windows ? If yes, can you please help me with the solution ?

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• Maxtor OneTouch Hardisk Not Recognised

  - by user8960

  I have a Maxtor OneTouch External Harddisk 160gb that i purchased recently. At first my Ubuntu 10.10 could not mount it. I opened disk utility which recognized it but with no filesystem. I proceeded to try formatting it but this error popped up Blockquote Error creating partition table: helper exited with exit code 1: Error calling fsync(2) on /dev/sdb: Input/output error Blockquote I resorted to Gparted. Things turned worse; it wasn't even listed in the list of devices. Does anyone have a solution to this problem? Any help is appreciated.

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• Best way to rename existing unique field names in database?

  - by Rajdeep Siddhapura

  I have a database table that contains id, filename, userId id is unique identifier filename should also be unique table may contain 10000 records When a user uploads a file it should be entered in database with given rules: If there is no record with same filename, it should be added as it is (Ex. foobar.pdf) If there is record with same filename, it should be added as uploadedName(2).ext (foobar(2).pdf) If there are n records with same base filename (foobar), it should be added as uploadedName(n+1).ext (foobar(20).pdf) Now if foobar(2).pdf is uploaded, it should be added as foobar(2)(2).pdf & so on This pattern needs to be followed because the file is already being uploaded at client side using ajax before sending the details to server and the file hosting service follows the above rules to name the files. My solution: maintain a file that contains all the names and the number of times it has occurred. if a filename that exists in file is entered, increase occurrence count and new name is generated, else add to it to file if the new name generated is in database, add it to file and generate new name

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• USB audio device not detected [solved]

  - by user199052

  I've been having problems with USB sound for some time (it used to work about 6 months ago). I find that any USB sound device that I connect is not recognised, and is not listed by aplay -l I've tried disabling pulseaudio. I've tried purging and re-installing alsa-base, pulseaudio, and pavucontrol. To no avail. I'm using 12.04 LTS. I found the solution: 12.04 does not have the needed kernel module snd-usb-hiface this is introduced in the 3.11.1 kernel and installing that on 12.04 gives USB sound for my equipment. How to install the 3.11.1 kernel is given here:- installing 3.11.1 kernel

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• Cost vs. Fun - Dilemma about learning a serverside language [closed]

  - by Ixx

  I want to learn a new server-side language. I already know Java. I'm fascinated by Scala, have read about it a lot, and want to get practical experience. But I also have some concerns of practical nature - I want to do the backend for many small, non-profit apps, and pay the lowest price for hosting possible. I also want that other people can easily contribute to these apps, if applicable. This leads me in PHP's direction. But I don't like PHP and would like to use these small projects to learn Scala instead. You see the problem, I don't want to pay more money each month, from my own pocket, for hosting. But I want to use these projects to learn Scala. Is there a practical solution for this?

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• How to remove items from an arraylist without shrinking the list [migrated]

  - by user73710

  I have a case where I am using the ArrayList to keep a list of items that are keyed by their position in the list. Other objects reference the ArrayList items by their position. If I delete one of the items from the list, I don't want the list to shrink because that would invalidate all other references to items in the list (e.g. item 2 is now in position 1). My solution to the shrinking array list problem is to null the position in the arraylist so that the list will not shrink. I am curious whether this will free the memory formerly held by the item at that position. If there is a better way to accomplish this requirement, I would like to know about it.

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• How do I reset a lost Administrative(root) password?

  - by user9904

  I'm working on a Ubuntu 10.04 (Lucid Lynx) system using a Panasonic CF-50 Laptop. My Client has completely forgotten his Administrative Password. He doesn't even remember entering one; however it is there. I've tried the suggestions on the WebSite and I have been unsuccessful in deleting the password so that I can download applets required for running some files. Do you have a solution? I look forward to hearing your response. Thanks for your time and consideration.

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• Statistics for facebook like button

  - by bessarabov

  I have a small site with facebook like button. I want to find out the information about what pages are liked. I've found url http://graph.facebook.com/?id=http://imdb.com but it shows only overal count for the site. I think that I can ask http://graph.facebook.com/?ids=url1,url2 with all my pages as the parameters to get detailed information, but this seems to be an ugly solution. A have lots of pages, so I have to ask facebook many times. Maybe there is some simple way of finding the information I need?

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• Different font SIZES in a Text Editor, based on Script(Alphabet) type (ie. per Unicode Code-Block)

  - by fred.bear

  Some non-Latin-based scripts(alphabets) have more detail in their glyphs than do the Latin-based-script equivalents, and typically need a larger font to give the same degree of legibility (resolution-wise). Sometimes, both script types need to be present in the same file. Notepad++ allows different font SIZES (and colour, etc) courtesy of syntax-highlighting. This allows me to display larger-fonted non-Latin-based script in a // BIG-FONT comment. Although this has been quite handy for me in some situations, it is quite limited. A Word Processor can handle this scenario, but I'm not interested in that. I want a nice simple(?) plain(?) Text Editor to do it... on a per script-type basis... eg. mixing Latin-1 and Devanagari (and Mandarin, and ... Such a thing may not exits, but Notepad++ has shown that a simple(?) plain(?) Text Editor is capable of it. Does anyone know of such a Text Editor? ...Q. Why not a Word Processor? ...A. Because GCC and Python don't like that format! but UTF-8 is fine.

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• Connecting 2 PCs using USB-to-USB (male-male) cable

  - by Amirizzuan

  I found this while Googling around: http://www.hardwaresecrets.com/article/Connecting-Two-PCs-Using-a-USB-USB-Cable/248 But then, the solution given in the article is using Windows. Is there any Ubuntu equivalent to this? I would really love to SSH into my Ubuntu server via my Ubuntu laptop, just by connecting one end of the male USB to my laptop, and another end of the male USB to my server. I know I can always SSH into my server via the network, but then in this case of mine, there are cases the server is inside a secluded-secured network server room, and the only way for me to check things out is to go into the server room and open the keyboard console and monitor there. But, if I can just bring my laptop inside and connect to the USB there, then that would be cool. Any idea guys?

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• F# - When do you use a type class instead of a record when you do not want to use mutable fields?

  - by fairflow

  I'm imagining a situation where you are creating an F# module in a purely functional style. This means objects do not have mutable fields and are not modified in place. I'm assuming for simplicity that there is no need to use .NET objects or other kinds of objects. There are two possible ways of implementing an object-oriented kind of solution: the first is to use type classes and the second to use records which have fields of functional type, to implement methods. I imagine you'd use classes when you want to use inheritance but that otherwise records would be adequate, if perhaps clumsier to express. Or do you find classes more convenient than records in any case?

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• Laptop Hibernates after adapter is unplugged

  - by SpyrosR

  Hello i am experiencing a strange problem under Ubuntu 12.04. If I unplug the charger while my laptop is on,i don't see any messages but my laptop goes straight into a suspend or hibernate mode and it's a real pain to get it stable again afterwards. It always suspends (or hibernates) It always takes 2 attempts to restart it (press power button, it starts and it hibernates again, press power button and it starts and stays on) It sometimes has an effect on the wireless which doesn't come back clean and i either have to switch the wireless on and off a couple of times. I sometimes have to restart the laptop totally Is anyone else experiencing the same issues and if yes,is there any solution? Thank you in advance.

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• IIS Media Services 4 Changing the Game

  The more I see of IIS Media Services 4 the more I observe the fundamental shift away from specialised and expense media servers to core services that run on top of any windows web server. In this case change is good as it provides options to the growing number of people that want to create and broadcast video online. Key Announcement #1: IIS Media Services will support a version of PlayReady DRM to enable protected HTTP streaming. The PlayReady DRM IIS Media Services solution will deploy on a single...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Search and Replace in MVC

  - by danip

  What would be a good MVC/OOP/GRASP/SOLID structure for a search/replace functionality. Methods: search/searchNext/replace/replaceAll. I'm interested only in the PHP arhitecture and how a professional developer would implement this in it's OWN FRAMEWORK. What names would you use for the classes? What subfolders would you used in your MODEL folder? How would you connect the MODELS/CONTROLLER? This is just a arhitecture question to understand better the principles of good OOP in practice. My current implementation is very simplistic using a service model: /controller/SearchReplaceController.php /models/services/SearchReplaceService.php The problem with this is I know I'm breaking SRP in the service but I found this somehow acceptable. Also creating a service does not feel like the best solution for this.

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• Designing a hierarchical structure with lots of reads and writes?

  - by JD01

  I am in the process of working on a video on demand system part of it involves the management of a hierarchical tree structure (think windows explorer) which allows users to upload videos, move folders around, create new folders etc. User action will be allowed depending on which permissions they have. In addition to managing the structure (creating folders and uploading videos), subscribers will be viewing content (read access). The number of reads will be significantly more than the writes. My question (and it is big one) is should I store the data in a database (for the writes) and also have some sort of cache which will be used for the reads? or do I use two databases? or is there a better solution? Also I will have to resolve concurrency issues which I think optimistic locking on the database will resolve. I have a fair bit about CQRS over the last few months but not sure if this is the way to go. Any ideas?

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• Issue with div image size [migrated]

  - by nextyear

  I hope this helps explain the issue I am having I have recently designed a horizontal scrolling portfolio for a client, the rights and wrongs of horizontal web design, is a sligtly seperate topic but alas the client wanted something different. Im having a real issue with the bottom div though As the monitor size is reduced its creating the browser scroll bar down the side as the div image is overlapping the monitor size. Wouldnt be such a huge issue but because of the nature of the horizontal site its producing a diagional scrolling effect. Is there away to prevent the screen expanding from the actual monitor size using css or anyother solution? I'm probably staring at the answer as I type but brain doesnt seem to be working unfortunately.

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• Gnome-shell freezes. What to do to keep apps open, like "alt+f2 r" when GS works

  - by user94592

  This is a repost, because no one had popper solution. What to do when gnome-shell freezes? Everything works correctly (music is still playing etc.), just the gui freezes. I am able to ctrl+alt+f1. What can I do after logging in the ctrl+alt+f1 terminal, in order to restore gnome-shell? If gnome-shell worked, I'd just hit alt+f2 and run r. I usually end up sudo rebooting which I don't like, because I have to reopen apps.

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• Systray not showing

  - by tnrgus

  I have an application called foo that runs as root. The foo calls system function to execute the other application which show tray icon using Qt. The Systray Icon Example in Qt is working properly in user account but not in root. I run the following command to drop privileges: system(“exec su -l user -c ‘export DISPLAY=:0; /opt/systray &’”); However, the systray icon doesn’t appear in Ubuntu 13.10 & 14.04. Is there any way to display this systray in this case except for the solution that uses a PPA that comes with to re-enable the systray whitelist?

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• Libreoffice theme integration not working (Xubuntu)

  - by Treepata

  I am running Xubuntu 11.10 and everything works nicely. I have selected a nice Xfce theme and everything looks beautiful, except Libreoffice. While other programmes (Gimp, Inkscape, Thunar etc.) integrate with the selected Appearance & Window Manager theme, Libreoffice looks like a Windows 98 programme. Does anyone know how to fix this? I have already tried this solution, without success: http://ubuntuforums.org/showthread.php?t=1584010&page=2 Thanks for your help!

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• Mac HDD Is Encrypted

  - by user206844

  I have the hard drive from a PowerMac G5, which was my old computer before it died and I upgraded to Ubuntu Studio. The hard drive its self still works well, but on Ubuntu I can't access most of the files. I plugged it into my MacBook Air and changed some of the perms on some of the folders as a test. This worked for a few, but for others, I was getting the same message Cannot access folder. Access denied. I would like to use this as an external HDD (I have a case and everything), but it's kind of pointless if I can't access the folders that I want. After looking around for a couple of hours, I couldn't find anything that actually gave me an answer. I would like to know if: Anybody else has come upon this problem, If so, have you found a solution? and, What is it?

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