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• Bookmark these Useful Support Notes

  - by DebaChatterjee-Oracle

  I am often asked by customers whether we have a document or paper on frequently asked Multitenant questions ? Since a FAQ type page needs to be frequently updated we have created a note in My Oracle Support. This note is maintained by Oracle Support and is continuously updated as we find new questions from our customers.  You can access the FAQ page here (1511619.1).  In addition to this page we have also created a master note for the Multitenant Option. This note is a good starting point for learning the basics of Oracle Multitenant. The master note can be accessed here (1519699.1).

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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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• Java Preferential Treatment

  - by Jay

  I have icedtea6-plugin installed on my Ubuntu box. The weird thing is, when I am browsing the internet, certain website are able to use the Java and some websites are not. For instance, I am able to log in to my bank at nordea.dk. They use a Java applet to authenticate the user. But when I try to use keepvid.com, it says "Loading Java Applet". And then after a minute or two it says "Error: Please click here to download Java. If you already have Java, please restart your browser and try again." The thing is I've restarted my computer, closed and opened my browser(chromium) and none of it seems to help. Could someone please point me in the right direction to solve this problem? Thanks.

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• Limitation of high level languages? [closed]

  - by user1705796

  My question may look bit philosophical and nonsense! But I need to know kind of instructions those are not well suitable in high level languages even in c? Or rarely use in the development of software? Like read/write content of CPU registers may useful in debugging programs. And access to cache memory required when developing OS (maybe I am wrong at this point). Is this kind of instruction available languages like Java, Python, C? I also have a second question: And Why all high level languages not having same uniform syntax; at-least same standard library interface name? In python there is and. Or operator is almost same as && and ||. I think Python is developed after C but space indentation is compulsory in Python. Why Python does not use brackets {}. I already know this question going to be highly down-voted.

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• Why does the installer freeze at the moving dots?

  - by Kits

  I plan to install Ubuntu as the sole operating system on my old Dell Latitude 110L and the install freezes at the Ubuntu starting dots - it doesn't even get to the point where it asks if you want Ubuntu as the sole operating system. I've tried different USB sticks, and now two different CDs. I even re-formatted the C drive on the old Dell and re-installed a fresh copy of Windows in case there was any interfering junk. Still can't get past the dots. I've done this on other computers without a problem - any advice?

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• Implement an FTP server (no threads) - how to start?

  - by ironicaldiction

  As a semester project, I have the following specification: Write a simple single threaded ftp server. The ftp server is configurable from a configuration file. The config allows to set the interface (where the server listens), the roots of the served content, transfer log, and database of users and its passwords. The server allows to create a virtual filesystem. By a virtual filesystem, we mean a mapping of a served directory to the real directory on the filesystem. For example, the client tree will look like: /home/user1 maps to /mnt/x/home/user1 /www maps to /var/cache/www /home/user_list.txt maps to /var/ftpclient/user_list.txt The user will see /home/user1 directory and /www directory and the file /home/user_list.txt The course is in C++. The projects to this point have provided a lot of structure, such as a class header file to get you started on the program. My question is this: how can I get started on what seems like quite a massive project (I have 3 weeks to return a working implementation)?

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• How can I remap my keys to act like the Macintosh keyboard (like hold alt l + l click = r click)?

  - by jaorizabal

  I want my keyboard layout to act like a Macintosh keyboard. It's hard to use my computer after years on a mac. I want to disable my right mouse click, and replace it with alt + right mouse click. The alt key will also act like ctrl. I want my left ctrl to be the HUD key. I still want my super key to be the same. Can someone please make a script, or point me in the direction of a program to do all this with ease. If you were to make a script/whatever, can you please make one what will reverse all keyboard changes in-case I feel that it is not the same. I will add to the post if I miss anything. Thank you.

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• Application of LGPL license on a simple algorithm

  - by georgesl

  The "scope" of the GNU license is troubling me : I know it has been answered many times ( here, here, ... ) but shouldn't we take into consideration the complexity and originality of a code before using GPL license ? I explain : I'm working on a pet project using the DTW algorithm that I have written in C using the pseudo-code given on the wikipedia page . At one point I decided to change it for a C++ implementation ( just for hone my c++ skill ) . After doing so, I've looked for an existing implementation on the web, to compare the "cleanliness" of it, and I found this one : Vectored DTW implementation, which is part of limproved, a C++ library licensed under GPL v3 . Personnally, I don't mind the GNU license because it is a personnal project, which will never led to any kind of commercial purpose, but I wonder if this implementation can abide a company using it to open their code ( and other FOSS permissions ). Theoretically, I think it can ( I may be wrong :p ), but the algorithm in question is so simple (and old) that it should not.

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• How to change color of the frame of a maximizing window

  - by SteliosSk

  Though I have read and tried some advises regarding the change of colors in a theme, I found no answer regarding my question, which is: When I drag a window to the left (or right or up) side of the screen an orange frame shows up, indicating the area that the window will occupy. This frame is in orange. Can you please inform me how can I change this color to blueish, to match my theme? At this point, I would like to inform you that Zorin OS has this blueish frame instead of orange, but I do not know where this color comes from.

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• update-grub is setting a wrong linux root partition

  - by adrian m

  Initially, Ubuntu was installed on another partition (sda5 or sda4). At some point I did manually move the root partition to sda2. Now, the problem is that whenever a new kernel is installed, the automatic regeneration of the menu.lst is using the OLD Linux partition. So I have to manually change in menu.lst the lines : root (hd0,5) into root (hd0,1) How can I configure update-grub to automatically generate menu.lst with the current Linux root partition? I assume that the (hd0,5) was written somewhere at installation, but I couldn't find it.

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• How to improve a single-paged site search result [closed]

  - by Trisism

  Possible Duplicate: How to SEO a Single-Page website I created an online CV of mine a couple of weeks ago and it has had quite a few visits. Now I want to improve the chance it will appear in google search results; however, my web CV is a one-paged site and it contains only internal links (those with hash #) so I can't really submit a sitemap. I could have changed the internal links to normal links to be processed on server-side, but there's no point of doing so. I'm very new to web SEO so I would really appreciate if somebody can show me what should I do with a single-paged site with internal links to be effectively indexed by crawlers.

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• Using <strong> for introductory paragraph to a post - a bad idea?

  - by user1515699

  I have a news website and on most posts the first paragraph is in bold. Currently the authors are just using <strong> to bold the paragraph, would it be better from an SEO point of view to rather use a paragraph class that is styled with p.bold {font-weight:bold;} <p class="bold">. Does <strong> on the first paragraph send the wrong message to search engines? The text is important but the main reason it is in bold is because it is the opening paragraph. I realise <strong> is used to emphasise certain words on a page

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• mysql questions for beginners

  - by ankhseeker

  ok, I have a few questions regarding mysql. I am currently running ubuntu 12.04.4 LTS command line version. I am looking for a database that I can use. I am confused at this point because I am uninformed. mysql is just one database that is on the server? or can it contain several or many databases What programs do I use to access it on the server or is it a vt-100 type access? I understand that mysql comes with lamp? or ubuntu. I am thinking that it is already installed but not sure how to access it, but that is another question for later. Outside of the man pages and the ubuntu manual, is there a site for its setup and use? Thanks!

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• Microsoft va-t-il devoir racheter Nokia pour pérenniser Windows Phone ? Le constructeur finlandais est de plus en plus dans la tourmente

  Nokia de plus en plus dans la tourmente Microsoft va-t-il devoir racheter le constructeur finlandais pour Windows Phone ? Nokia coule-t-il à pic ? Peut-être pas encore, mais le constructeur se rapproche dangereusement du point de rupture. Après avoir dévoilé de mauvais résultats prévisionnels (une perte d'exploitation de plus en plus importante qui dépassera les 3% du CA), et en dessous des attentes, l'action du groupe s'est littéralement écroulée de 18 % pour atteindre son plus bas depuis plus de 12 ans. [IMG]http://ftp-developpez.com/gordon-fowler/Nokia%20Bourse%202.png[/IMG] Conséquence de ces résultats, Nokia va fermer son usine finlandaise ? seule la R&a...

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• Dualboot - Windows partition does not work [0xc000000e] + video

  - by Chestnutjam

  Some may claim that this has already been asked, but I don't see MY problem in any of those posts. And if they actually have the same problem as mine, I may not understand what they've been trying to point out, actually. I hope you understand as to why I require a direct answer to the problem I'm having. Here's a video: https://www.youtube.com/watch?v=lyu_BsUTk5Q Some information that may help: This is a Lenovo laptop which came with Windows 8. I installed Ubuntu 14.04 along my Windows using a USB stick. It is possible to access my Windows (8.1) files from the folder page. I took off the Windows sticker, so I cannot get a Windows CD or anything from the support guys. I would delete my Windows partition then, but it's also tangled in this geeky mystery. Thank you in advance!

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• GUI is not displayed anymore

  - by mdobrinin

  I am running 12.04 LTS on a VM. I encountered a problem with the screen being black and the familiar orange background showing for a fraction of a second when clicking or resizing the screen. I had to shutdown the machine and now I have no GUI. I only get a black command-line interface. As some other posts suggest, I attempted: sudo service lightdm restart This doesn't work for me because it gets stuck at this point: Skipping profile in /etc/apparmor.d/disable: user.bin.firefox Skipping profile in /etc/apparmor.d/disable: user.sbin.rsyslogd * Starting AppArmor profiles [ OK ] Any ideas?

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• iPhoneOS 4 bêta 3 et SDK disponibles, ils corrigent les problèmes de la précédente version et intro

  iPhone OS 4 bêta 3 et SDK Apple a proposé dernièrement aux développeurs la troisième bêta de l'iPhone OS 4 (firmware et SDK). Cette nouvelle version était vraiment attendue par tous les développeurs, car la version précédente était considérée comme une véritable "catastrophe" au point que certain développeur serait retourné sur la dernière version officielle de l'OS (3.1.3). En effet, la bêta 2 était vraiment instable, lente, avec de gros problèmes dans certaine application principale, comme l'incapacité de prendre des photos, l'impossibilité de recharger son iPhone sans être obligé de redémarrer l'appareil ou encore des problèmes aux réseaux Wifi ou 3G. Cette bêta corrige donc ces problèmes, il est mainte...

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• Port flash game to native android

  - by wirate

  Alright here is the problem: the creators of a quite popular flash-based game have asked me to port their game to Android. They are not interested in any other platforms so we don't need to be worrying about iOS or PC. They want the best performance on just Android (I guess that's the point of porting a flash-based game. They could have just went with it) They found Unity 'slow'. How would the performance (on android) of other engines compare? Are they expecting too much i.e. finding Unity slow? I am in favor of Unity since development is a little easier with more things being visual (I am not experienced as you might have guessed). This would be an example of the type of game I am to port Thanks!

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• Ubuntu installation time problem

  - by hellodear

  I am installing Ubuntu and I am stuck at a point. The step is when it is asking me to select partition. It is showing me error: "No file system is defined Please correct this from partitioning menu". I am getting this error when I am clicking "Install". I want Ubuntu to install in /dev/sda7 which is 226727 Mb. I have Windows 8 in my system and I want to dual boot the system. So how to correct this error? I want to allocate this whole partition to Ubuntu only. Secondly, What should I put in the option: "Device for boot loader installation"? By default it is somewhat like this: "ATA WDC WD5000..." something like this. Please tell my both these questions. I would be very thankful to you. Thanks.

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• Connection make b/w iphone to windows pc-rajay [on hold]

  - by Rajay

  I Need to create connection between ios to windows by using socket programming in ios. I'm trying to to use an application to communicate with Windows via sockets. At the minimum, I'm trying to at least figure out how I can create a connection from the iPhone (maybe using the iPhone to ping the Windows machine?) I'm not really clear on where I need to start. I'm pretty new to iOS development in general, and brand new to socket/network programming. I've tried several tutorials that haven't gotten me far. My goal is: Connect to a server via sockets (the server will be a Windows machine with a service waiting for incoming connections from the iPhone) If possible, I would like to write/build the client piece first, but I have been lost thus far. Hopefully the nice folks in the SO community can lend a hand and point me in the right direction.

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• NetworkManager refuses to manage my WLAN interface

  - by user104167

  I'm using Ubuntu 12.10 with Gnome 3.6 on a brand-new Samsung NP900X4C. The installer detected the wireless adapter, took in the SSID and WPA passphrase, wrote these into /etc/network/interfaces and connected perfectly. Once installation was finished I wanted to switch to using NetworkManager to manage the wireless adapter, since this is much more convenient than fiddling with /etc/network/interfaces every time I find a new hotspot. Therefore I edited /etc/NetworkManager/NetworkManager.conf to set: [ifupdown] managed=true When I rebooted NetworkManager, the problems started: - The NetworkManager tray applet changed from saying device not managed to device not ready - I lost all internet connectivity as wlan0 would not associate to the Access Point - if I set managed=false in NetworkManager.conf and restarted both NetworkManager and networking services from the command-line, the Gnome desktop "semi-crashed" and lost all its Window Decorations, the panel, the launcher and basically became unusable. However if I restart the computer completely after setting managed=false, wlan0 once again works perfectly.

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• Distinguishing between sets of status reports

  - by user1769486

  I am working on an internal database monitoring system and am at a point where I sort of hit the wall in terms of application design. Basically I have an extensible plugin architecture where I shall have an OK, a warning or an error upon running a db verification. My first question whether it is sufficient to have only one status reported with an optional status message or provide the ability to have more than one returned (with attached messages) and then calculate an aggregated overall status. In particular in the latter case my second issue would be how to distinguish between two verification reports with the same status code (as it can come from different triggers). I would need to do this to see whether some change happened between the current and last verification. I could simply have string comparisons of the attached status messages mentioned above but that does not seem very reliable.

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• Can I stop battery charging at say 80% and switch to AC?

  - by elim

  While I was looking for a battery management utility for my Dell E5420, I came to read this post - How can I limit battery charging to 80% capacity? . Sofar, I haven't found one that relates to my laptop. So, I wonder now if any battery manager utility can be found for my laptop specified above. I would be happy if someone could point me if such utility is available under Ubuntu 12.04 that can stop charging a battery at a certain percentage and to ONLY use A/C mode. Again, to start using battery mode when the A/C is off or when the battery level reaches at certain level. Thanks for all your help. Elim.

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• What's the reason in your mind Exception are heavily used in Managed (C# and Java) language but not in C++?

  - by ZijingWu

  AFAIK, a lot of C++ projects don't allow exceptions and deny them in coding guidelines. I have a lot of reasons, for example, Exception is hard to handle correctly if your binary needs to be compiled by separate and different compilers. But it doesn't fully convince me, there is a lot of projects which are just using one compiler. Compared to C++, Exceptions are heavily used in C# and Java and the reason can only be that Exception are not bringing enough benefit. One point is Debugbility in practice. Exception can not get the call stack in C++ code, but in C# and Java you can get the call stack from Exception, it is significant and makes debugging easier. No-CallStack is not the fault of the Exception, it is the language difference , but it impacts the Exception usage. So what's the reason that exceptions are frowned upon in c++ programs?

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• Why does Linq to Entity Sum return null when the list is empty?

  - by Hannele

  There are quite a few questions on Stack Overflow about the Linq to Entity / Linq to SQL Sum extension method, about how it returns null when the result set is empty: 1, 2, 3, 4, 5, 6, 7, and many more, as well as a blog post discussing the issue here. Now, I could go a flag these as duplicates, but I feel it is still an inconsistency in the Linq implementation. I am assuming at this point that it is not a bug, but is more or less working as designed. I understand that there are workarounds (for example, casting the field to a nullable type, so you can coalesce with ??), and I also understand that for the underlying SQL, a NULL result is expected for an empty list. But because the result of the Sum extension for nullable types is also not nullable, why would the Linq to SQL / Linq to Entity Sum have been designed to behave this way?

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