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• Why can't the Unity panel be hidden?

  - by newboldrob

  I am a light Linux user. I have Natty installed on my netbook and used to have it dual-booted on my Windows 7 PC. After a total refresh of my notebook off came Ubuntu and I'm back to basics over there. But HERE (I'm running Natty on a HP-Mini) I've decided to poke around a bit to get the best user experience on this little thing. I really like the Unity interface but really hate the static Unity Panel. I have no clue why it's even necessary to be on globally. After all, in the classic interface, both panels can autohide or get filed aside with buttons on either side of the bar. On a 10" screen, real estate is at a premium. What intrinsic purpose does the static unity panel hold for the OS? There has to be a great reason for this thing to HAVE to be here. It ONLY goes away in fullscreen apps and I can't use everything fullscreen Why can the unity panel not be hidden?

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• What is upcasting/downcasting?

  - by acidzombie24

  When learning about polymorphism you commonly see something like this class Base { int prv_member; virtual void fn(){} } class Derived : Base { int more_data; virtual void fn(){} } What is upcasting or downcasting? Is (Derived*)base_ptr; an upcast or downcast? I call it upcast because you are going away from the base into something more specific. Other people told me it is a downcast because you are going down a hierarchy into something specific with the top being the root. But other people seem to call it what i call it. When converting a base ptr to a derived ptr is it called upcasting or downcasting? and if someone can link to an official source or explain why its called that than great.

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• If you want to learn all about Exalogic in 6 minutes, watch this demo!

  - by Michael Palmeter (Exalogic PM)

  If you haven't seen the latest Exalogic demo, click here now. Our excellent marketing organization has recently produced a new 6-minute flash demo that describes the Exalogic Infrastructure-as-a-Service management UI.  After years of investment in this product we are now in the final stages of delivering on the complete private-cloud-in-a-box vision that Larry Ellison announced back at Oracle OpenWorld 2010.  This demo video (flash) does the best job yet of explaining what is so great about Exalogic and why it is going to drive transformation of our industry.  If you haven't seen it yet, take a look.  There's much more to Exalogic now than just blazing performance.

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• Does attending the upcoming Devdays 2011 have some value for a resume?

  - by systempuntoout

  This fall I'm 99% going to London to attend the awesome Devdays 2011; I have many reasons to go there and some of them are: Professional stuff Great people Awesome topics Unicorns Passion London :) Obviously all the cool technologies that will be discussed are light years far from my daily work but useful for my side projects and maybe for some future employment. Now, to get to the point; a coworker said to me that he won't come with me because Devday London is expensive, and something expensive should reward you with a certificate, a certificate that could have some value to the eyes on an employer. Is he right? Do you think that attenting to this kind of event have some value on a resume? Should it be highlighted? Does it have any value for a future employer?

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• How to study for an Informatics Olympiad [on hold]

  - by Cloud

  One of my goals for next year is to participate in the Australian Informatics Olympiad. As far as I'm aware, it is not too different from Informatics Olympiads in other countries. What would be the best way to study for this? What content should I pay particular attention to while learning in Python? I am currently using the book 'Learn Python the hard way', but are there any other books worthy of a mention? This is the link to their site: http://orac.amt.edu.au/aio/ It contains sample questions, so you can get an idea for the structure or nature of the competition. I know this isn't really a specific programming question, but it would be great if someone could share their experience or give some suggestions for me.

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• How do I create and link to a database in ASP.NET (Razor) with Visual studio 2013?

  - by Blake

  We have a simple web app, part of which allows users to create accounts and then, hopefully soon, to write blog posts. The user log in system is working great, it utilizes the given .sdf database created when a new project is created. We would like to expand it now to allow for blog data (the title, body of the blog, image posts perhaps, etc). However, I'm unsure of how to add another table to the user database for this purpose - or if that would even be best since it has sensitive information in it. I've been reading blog post after blog post and still can't find anything current on this. All of the articles are for MVC projects or older versions of VS. If someone could point me in the right direction it would be greatly appreciated!

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• What's the normal way machine-learning algorithms are integrated into normal programs?

  - by Benjamin Pollack

  I'm currently taking a machine learning course for fun, and the course heavily focuses on Matlab/Octave to write the code. One thing mentioned in the course is that, while Matlab/Octave are great for prototyping, they're very rarely used for production algorithms. Instead, those algorithms are typically rewritten in C++/Python/etc., using appropriate libraries, before reaching customers. Fair enough; I get that. But here's my question: is that done for cultural reasons, for technical reasons, or because there is really no language that provides Matlab/Octave-like fluidity, but in a compiled form that can be linked from C/C++/$MainstreamLanguage? The game industry uses Lua for game logic because it's easy to embed, and vastly superior for expressing things like AI. Likewise, there are Prolog variants for rules-heavy applications, Scheme variants for compilers, and so on. If there's a matrix equivalent language, what is it? If there isn't, why is this field different?

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• Wake up from sleep with GPIO (I2C)

  - by spambas

  My situation: Ubuntu 10.10 running on an atom driven main board the main board has a GPIO chip integrated (F75111 by Fintek). They communicate through I2C(SMBus). We have a driver running that works, we can send outputs and read inputs. Great! We would like to use the I/O interface to suspend (sleep) and wake up again. Sleep is no problem. On an incoming input: run s2both. Ubuntu goes to sleep and prepares a hibernate state, so when the power-cord is unplugged by accident, it will wake from hibernate. But the big question: how to wake on an input if the OS is already sleeping! You can wake from a lot of devices (lan, usb, ring, etc) but I can't find out how to wake from a I2C card. PLEASE HELP!

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• O'Reilly Deal to Oct/14/2013 05:00 PT - 50% off E-Books on mastering CSS3

  - by TATWORTH

  Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2013/10/11/oreilly-deal-to-oct142013-0500-pt---50-off-e-books.aspxAt  http://shop.oreilly.com/category/deals/css3.do?code=WKCSS&imm_mid=0b155e&cmp=em-prog-books-videos-lp-owo_css3_direct_wkcss, O'Reilly are offering 50% off a number of e-books on mastering CSS3 "CSS3—the technology behind most of the eye-catching visuals on the Web today—is loaded with capabilities that once would have required JavaScript or third-party plugins, such as animation, pseudo-classes, and media queries. Use CSS3 to transform markup into stunning, richly detailed web pages that look great in any browser. For one week only, SAVE 50% on CSS3 ebooks from shop.oreilly.com and take your sites from ordinary to incredible."

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• O'Reilly 50& off offer on CSS3 books to 05:00 PT on Oct/28

  - by TATWORTH

  Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2013/10/21/oreilly-50-off-offer-on-css3-books-to-0500-pt.aspxAt  http://shop.oreilly.com/category/deals/css3.do?code=WKCSS&imm_mid=0b155e&cmp=em-prog-books-videos-lp-owo_css3_direct_wkcss, O'Reilly are offering 50% off a number of e-books on mastering CSS3 to 05:00 PT on Oct 28 "CSS3—the technology behind most of the eye-catching visuals on the Web today—is loaded with capabilities that once would have required JavaScript or third-party plugins, such as animation, pseudo-classes, and media queries. Use CSS3 to transform markup into stunning, richly detailed web pages that look great in any browser. For one week only, SAVE 50% on CSS3 ebooks from shop.oreilly.com and take your sites from ordinary to incredible."

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• Slide decks of Windows Phone 7 talk @ MoMo

  - by subodhnpushpak

  Hi, I presented a talk on Windows Phone 7 @ MoMo and got awesome response, even though WP7 is quite new still. I also demoed 2 applications on both emulator and the actual device. It enjoy the look on audience faces when they see the app actually work on actual device. I see a great opportunity on WP7 and everyone I met agrees on the fact the WP7 has a very bright future ahead. The Ecosystem which WP7 has (developing/ debugging tools, emulator, almost flat learning curve,  office/sharepoint integration a lively forum, marketplace) makes it a major player in mobile, already. Here is the slide – deck. Here are the details of the event. http://momodelhi11.eventbrite.com/#m_1_100 And here are few snap shots of the event. Windows Phone 7 Demo VIEW SLIDE SHOW DOWNLOAD ALL    Do provide your comments.

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• Just Finished My Presentation at SLO! (Central Coast Code Camp At Cal Poly)

  I love code camps!  This is my first time to San Luis Obispos Central Coast Code Camp and Im really enjoying it.  It started last night with the presenters dinner at a great local steak... This site is a resource for asp.net web programming. It has examples by Peter Kellner of techniques for high performance programming...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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• OPN Knowledge Zones: Have you Signed Up for Specific Updates?

  - by Meghan Fritz-Oracle

  Hi there, partners! Do you want access to OPN resources, tools and product updates? Want to receive customized information relevant to your personal interests? You can now easily manage your communication preferences for the Oracle product Knowledge Zones you consider informative and useful by checking your Oracle Partner Store (OPS) account and specifying your preferences. Even better, you can come back at any time to update your preferences to receive only what’s relevant for your business. It’s easy to do and the benefits are endless! Just follow these simple steps in this video: There is a lot of great information you may be missing out on if you haven’t signed up for the OPN Knowledge Zone, partners. So what are you waiting for?Cheers,Your always-on OPN Communications team

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• Is premature optimization really the root of all evil?

  - by Craig Day

  A colleague of mine today committed a class called ThreadLocalFormat, which basically moved instances of Java Format classes into a thread local, since they are not thread safe and "relatively expensive" to create. I wrote a quick test and calculated that I could create 200,000 instances a second, asked him was he creating that many, to which he answered "nowhere near that many". He's a great programmer and everyone on the team is highly skilled so we have no problem understanding the resulting code, but it was clearly a case of optimizing where there is no real need. He backed the code out at my request. What do you think? Is this a case of "premature optimization" and how bad is it really?

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• Google I/O 2012 - Fast UIs for the Cross-Device Web

  Google I/O 2012 - Fast UIs for the Cross-Device Web Boris Smus One of the great features of the modern web is that sites work on any device with a browser. This session will focus on creating UIs for the cross-device web. We will cover building web sites that support multiple device form factors (responsive and non-responsive approaches), discuss single page sites and some of the layout features in modern mobile browsers, and do a deep dive into multi-touch input on the web. Finally, we'll show some of the awesome new mobile debugging tools in Chrome and Chrome for Android. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 105 3 ratings Time: 49:31 More in Science & Technology

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• Managing multiple references of the same game entity in different places using IDs

  - by vargonian

  I've seen great questions on similar topics, but none that addressed this particular method: Given that I have multiple collections of game entities in my [XNA Game Studio] game, with many entities belonging to multiple lists, I'm considering ways I could keep track of whenever an entity is destroyed and remove it from the lists it belongs to. A lot of potential methods seem sloppy/convoluted, but I'm reminded of a way I've seen before in which, instead of having multiple collections of game entities, you have collections of game entity IDs instead. These IDs map to game entities via a central "database" (perhaps just a hash table). So, whenever any bit of code wants to access a game entity's members, it first checks to see if it's even in the database still. If not, it can react accordingly. Is this a sound approach? It seems that it would eliminate many of the risks/hassles of storing multiple lists, with the tradeoff being the cost of the lookup every time you want to access an object.

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• Is possible to write too many asserts?

  - by Lex Fridman

  I am a big fan of writing assert checks in C++ code as a way to catch cases during development that cannot possibly happen but do happen because of logic bugs in my program. This is a good practice in general. However, I've noticed that some functions I write (which are part of a complex class) have 5+ asserts which feels like it could potentially be a bad programming practice, in terms of readability and maintainability. I think it's still great, as each one requires me to think about pre- and post-conditions of functions and they really do help catch bugs. However, I just wanted to put this out there to ask if there is a better paradigms for catching logic errors in cases when a large number of checks is necessary.

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• Partitions and cdrom are not mounted, and the bars are missing in Ubuntu 12.04

  - by nuit

  Provide my spec and sorry for my poor English first. MB: Gigabyte G31M-S2L (bios ver. F9) CPU: intel E5200 2G RAM HD1: WD 160G with 2 partitions (partition 1:60G, NTFS, win xp; partition 2:100G, NTFS) HD2: WD 320G with 2 partitions (partition 3:220G, NTFS; partition 4:100G, ext4, Ubuntu) Recently, I tried to install Ubuntu 12.04 Beta 2 on my desktop PC (on partition 4). At the beginning, everything looked great including the auto-mounting of partitions 1~3 and the unity (3D). However, after I deleted and re-allocated the partitions on HD2 and re-installed Ubuntu on partition 4, the partitions 1~3 are no longer auto-mounted when I logged in the desktop (and even the inserted cdrom would not be mounted either), and the launch bar and menu bar in unity (3D) are missing. The configurations during these two installations are all the same as default. Are there any possible reasons or solutions for this issue? Thank you in advance!

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• Where can I find a package for "project looking Glass"? ("The Java desktop")

  - by Alvar

  Hi, I really really want to find this package. Because after I saw the youtube clip I realized it's just one of those things I must have done before I die. This tutorial would be great if the repository were online. My question is: Where can I find the file, and how can I install it without changing my current desktop? The project was called "project looking glass" and was released in 2007. It is now an "inactive open source project", according to its Wikipedia article. @Takkat found this VERY good live cd, hope it works.

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• How to get an email notification when a USB storage device is inserted?

  - by karthick87

  We are running more than 600 Ubuntu systems in our company. It is a data centre so we have certain policies. We have disabled the usage of storage devices in all the Ubuntu systems. However we would like to configure email alerts. If someone inserts storage devices, we should get an email Alert with subject as below, Email Alert: STORAGE DEVICE FOUND on IP: 172.29.35.18 Note: Where as for Windows system, we have certain policies applied in our DC. So there is no problem with Windows system. We need to receive alerts for Ubuntu system also. Any way to accomplish the above task would be great.

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• Alternative to Firefox's Tab Groups feature for Chromium/Chrome

  - by Halkinn

  Firefox keeps crashing the whole time on my Lubuntu 12.04 since version 12, I don't know why, I am running it on a Pentium IV desktop so might be CPU shortage, however I use the same set of extensions and configurations that I have on Windows' Firefox and it rarely crashes, runs smoothly and besides on Windows it can handle much more tabs opened before some freeze actually happens. Chromium is working better so far on Lubuntu, but I really do miss the Tab Groups Firefox feature, which is great to group tabs and organize them, it really is a boost on my productivity. Are you aware of any add-on which is similar for Chrome/Chromium? I've searched around on Chrome's Web Store but no luck at the moment.

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• How would one start a website with robust and scaleable hosting?

  - by Richard DesLonde

  This question is about hardware and hosting, and how to "bootstrap" them. If you built a really great website, how could you have it hosted at low cost but so that it reassures customers that their data is safe and available. As an example, what if I have a web application I developed for small companies to use for their accounting, a replacement for Quickbooks. Aside from getting a bunch of money from VCs or Angels, how would you be able to host this so that you could guarantee your customers that their data won't be lost, and the site will always be up so that they can always get to their data?

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• Most effective marketing strategy to promote a casual iOS game?

  - by user1114968

  So I posted this on another forum yesterday but that forum got suspended for malware so gotta wait for the webmaster to fix the site. Here's the basics: We've released a press release through PRMac that included a video review. Submitted and followed up on all the big iOS review sites. None of them replied back with interest. A lot of them just told me that their editors are volunteers who will review games that are "interesting to their readers" and that they would put my app "into consideration" The only site that reviewed our app and promoted virally was iPhoneAppReview.com which we paid. We promoted on the top iOS forums We are now doing in-app advertising through inMobi and are integrating the SDK code into our app to start doing Tapjoy We posted up our gameplay videos on YouTube Any marketing strategies that anyone can suggest or recommend that we haven't used yet? If anyone wants to try out our game and give feedback on the game or the site or anything, that would be great! Our target countries are Japan, China, and the US.

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• SQL vs. Oracle Live Debate (AKA Smackdown!)

  - by Peter W. DeBetta

  A few years ago I was speaking at a conference in Raleigh, NC where Ted Neward and I found a fun way to promote a Java vs. .NET debate that was planned one evening. We stood in the middle of a crowd during one of the breaks and starting “arguing” about Java vs. .NET with one another. Our voice levels quickly raised and we ended it by slapping each other across the face with a glove to request a challenge. It was a great way to segue to our announcing of the actual debate planned later that evening....(read more)

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• My Dog Ate My Surface

  - by Richard Jones

  Working for a Microsoft partner I was very fortunate enough to be given clearance to order a Microsoft Surface RT tablet. Justification, show new device to a customer event this Thursday. All good, time to develop an App. Surface arrived last Wednesday. Overnight, Coco our much loved one year old puppy Larba-Doodle pulled the power chord out of my bag and bit right through the cable (at the power-brick end). A quick re-order to Microsoft saved the day. Demo went great. Surface is fab, Coco; much loved too Laptop bag now placed a bit higher up in our house.

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