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• Creating a bootable USB recovery drive to be used by someone who isn't computer savvy

  - by David

  I am looking for a way to prepare an image of an Ubuntu machine which would be bootable and installable in the easiest way possible. I'm actually preparing an Ubuntu machine for someone living far, and not computer savvy. If he ever has troubles with his installation, he could just put a USB drive in, boot the machine and everything would be resetted for him. I know there are many methods of creating/loading an image of a drive, but the ones I've found so far have complicated menus with several options to choose from, etc. Ideally, perhaps only asking a Yes/No question such as "Would you like to reinstall?" would be great. Does such a tool exist? Thank you in advance!

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• Scrum got specific ways for testing software?

  - by joker13

  When reading Scrum Guide, as the official text for scrum, I find out there is no specific solution to provide software testing in scrum. (the only hint is on page15) I'm a little vague on whether scrum is considered a software development methodology or not? If it is not, then how come some of its practices opposes Extreme Programming? (I know that in scrum guide, the author notes that scrum is a framework not a methodology, but still I'm not pretty clear on that) And what's more, I'm not sure if there are any other important textbook that I'm missing so far about scrum. I need them to be official or of great deal of public acceptance.

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• How does the "Fourth Dimension" work with arrays?

  - by Questionmark

  Abstract: So, as I understand it (although I have a very limited understanding), there are three dimensions that we (usually) work with physically: The 1st would be represented by a line. The 2nd would be represented by a square. The 3rd would be represented by a cube. Simple enough until we get to the 4th -- It is kinda hard to draw in a 3D space, if you know what I mean... Some people say that it has something to do with time. The Question: Now, that is all great with me. My question isn't about this, or I'd be asking it on MathSO or PhysicsSO. My question is: How does the computer handle this with arrays? I know that you can create 4D, 5D, 6D, etc... arrays in many different programming languages, but I want to know how that works.

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• Ubuntu 12.04 - after update it boots in command line only (no windows manager)

  - by ZSW

  I have Ubuntu 12.04, which has been working great for me since I installed it a year ago. Yesterday I ran the updates that update manager recommended. (Last time I ran updates before was about a week ago). After the updates were installed, it asked me to reboot. So I rebooted it, and then it stopped at login prompt (as a command line, with no windows). I logged in and tried to manually start the windows manager, and the screen went blank, and stayed blank I waited several minutes, and then turned it off. How can I figure out what is the problem? Which logs should I check?

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• How can I store all my level data in a single file instead of spread out over many files?

  - by Jon

  I am currently generating my level data, and saving to disk to ensure that any modifications done to the level are saved. I am storing "chunks" of 2048x2048 pixels into a file. Whenever the player moves over a section that doesn't have a file associated with the position, a new file is created. This works great, and is very fast. My issue, is that as you are playing the file count gets larger and larger. I'm wondering what are techniques that can be used to alleviate the file count, without taking a performance hit. I am interested in how you would store/seek/update this data in a single file instead of multiple files efficiently.

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• Samsung driver for notebooks in Natty?

  - by burli

  Hi, I have a Samsung N150 Netbook and I installed Unity 11.04 to make some tests. But some functions do not work like backlight and vertical scroll on the touchpad. There are drivers for samsung notbooks and I know that there is a PPA. But not for Natty. Will the drivers be avalible some day in the kernel by default? Will Canonical add these drivers in the kernel, if the Kernel developers wont? I think this would be very usefull because Unity is great for Netbooks and Samsung Netbooks are really nice.

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• How to Create a Custom Refresh Image in Windows 8

  - by Taylor Gibb

  We have already shown you how to use the Refresh and Reset features in Windows 8, now we are back to show you how you can create a custom refresh image. This means next time you refresh your Windows 8 PC, you can use a custom image instead of the one that shipped with your PC. When you refresh your PC, all your files as well as Metro applications that you downloaded from the Windows store are kept. This is great, however, all your non-metro applications and PC settings are removed. If you are like me and have a lot of non-metro apps this can be very annoying, but you can fix this by creating a refresh image that already has your apps installed and your settings tweaked. 6 Start Menu Replacements for Windows 8 What Is the Purpose of the “Do Not Cover This Hole” Hole on Hard Drives? How To Log Into The Desktop, Add a Start Menu, and Disable Hot Corners in Windows 8

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• Change players state and controls in-game

  - by Samurai Fox

  I'm using Unity 3D Let's say the player is an ice cube. You control it like a normal player. On press of a button, ice transforms (with animation) into water. You control it completely different than the ice cube. Another great example would be: Player is human being and has normal FPS controls. On press of a button human transforms into birds and now has completely different controls. Now, my question is, what would be easier and better: make one object with animation transition and to stay in that state of anim. until button is pressed again make two object: ice and water. Ice has an animation of turning into water. So replace ice (with animation) with water object And if anyone knows this one too: how to switch between 2 different types of player controls.

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• Roanoke Code Camp 2014

  - by Brian Lanham

  Originally posted on: http://geekswithblogs.net/codesailor/archive/2014/05/18/156407.aspxI had a great time yesterday at Roanoke Code Camp!  Many thanks to American National University for the venue, the code camp staff and volunteers, the other speakers, and of course the attendees who made my sessions interactive.  I learned a lot yesterday and it was a good time all around. I attended sessions on Apache Cassandra by Dr. Dave King (@tildedave), Angular JS by Kevin Israel (@kevadev), and JavaScript for Object-Oriented Programmers by Joel Cochran (@joelcochran).  I regret I was unable to attend all the sessions. I also had the opportunity to present.  I spoke on Redis and got some people excited about graph databases by talking about Neo4j.  You can find my slides and other materials at the following links: My Presentation Materials Folder Redis Materials – Slides     - Snippets Neo4j Materials – Slides     - Snippets If you have any trouble getting any of the materials just respond to this post or tweet me @codesailor and I will make sure you get the information you need.

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• Self-documenting code vs Javadocs?

  - by Andiaz

  Recently I've been working on refactoring parts of the code base I'm currently dealing with - not only to understand it better myself, but also to make it easier for others who are working on the code. I tend to lean on the side of thinking that self-documenting code is nice. I just think it's cleaner and if the code speaks for itself, well... That's great. On the other hand we have documentation such as javadocs. I like this as well, but there's a certain risk that comments here gets outdated (as well as comments in general of course). However, if they are up-to-date they can be extremely useful of say, understanding a complex algorithm. What are the best practices for this? Where do you draw the line between self-documenting code and javadocs?

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• Are there any specific workflows or design patterns that are commonly used to create large functional programming applications?

  - by Andrew

  I have been exploring Clojure for a while now, although I haven't used it on any nontrivial projects. Basically, I have just been getting comfortable with the syntax and some of the idioms. Coming from an OOP background, with Clojure being the first functional language that I have looked very much into, I'm naturally not as comfortable with the functional way of doing things. That said, are there any specific workflows or design patterns that are common with creating large functional applications? I'd really like to start using functional programming "for real", but I'm afraid that with my current lack of expertise, it would result in an epic fail. The "Gang of Four" is such a standard for OO programmers, but is there anything similar that is more directed at the functional paradigm? Most of the resources that I have found have great programming nuggets, but they don't step back to give a broader, more architectural look.

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• Why isn't LISP more widespread?

  - by Andrea

  I am starting to learn Scheme by the SICP videos, and I would like to move to Common Lisp next. The language seems very interesting, and most of the people writings books on it advocate that it has unequalled expressive power. CL seems to have a decent standard library. Why is not Lisp more widespread? If it is really that powerful, people should be using it all over, but instead it is nearly impossible to find, say, Lisp job advertisements. I hope it is not just the parenthesis, as they are not a great problem after a little while.

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• Set up Java path for terminal

  - by Xsteen

  Trying to set up a path for the terminal. I already have Eclipse running great. Dual os between windows 7 and Ubuntu 12.04. However, I would prefer to run everything out of Ubuntu, just not very experienced and all the forums I have searched are not giving me the step by step answers I need to make this happen. I included a screen shot of some information about my version etc. Any help would be greatly appreciated at this point I've put 10+ hours into this and this is my last resort.

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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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• Friday Spotlight: Oracle Secure Global Desktop and amitego VISULOX

  - by Chris Kawalek

  Happy Friday! Our spotlight this week is a screencast about a fantastic solution that takes the security model of Oracle Secure Global Desktop and adds even more features. If you work in environments where you need to have a video record of users' interactions with applications, or need to ensure that two users can remotely work on the same session (a worker entering data in a form from one workstation and a manager typing an authorization code from another, for example), amitego VISULOX can do this and a lot more. It's built on top of Oracle Secure Global Desktop, so you get all of the great features there, plus additional unique security related features provided by VISULOX. Click the thumbnail below to watch the screencast. We'll see you next week! -Chris 

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• Interpolating between two networked states?

  - by Vaughan Hilts

  I have many entities on the client side that are simulated (their velocities are added to their positions on a per frame basis) and I let them dead reckon themselves. They send updates about where they were last seen and their velocity changes. This works great and other players see this work find. However, after a while these players begin to desync after some time. This is because of latency. I'd like to know how I can interpolate between states so they appear to be in the correct position. I know where the player was LAST seen and their current velocity but interpolating to the last seen state causes the player to actually move -backwards-. I could not use velocity at all for other clients and simply 'lerp' them towards the appropriate direction but I feel this would cause jaggy movement. What are the alternatives?

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• From Transactions To Engagement

  - by David Dorf

  I've mentioned in the past that Oracle has invested quite a bit in acquiring social companies to build out its Social Relationship Management suite.  The concept is to shift away from transactions and towards engagement.  Social media represents a great opportunity to engage with customers, learn what they want, and personalize the shopping experience for them. I look at SRM as the bridge between traditional CRM and CX.  If you're looking for ideas, check out Five Social Retailing Suggestions and Social Analytics and the Customer.  There are lots of ways to leverage social media to enhance the customer experience and thus drive more sales. My friends over at 8th Bridge have just released their Social IQ report in which they rate retailers on their social capabilities.  They also produced a nice infographic so you can consume the data quickly, but I'd still encourage you to download the full report. Retailers interested in upping their SRM abilities should definitely stop by the Oracle booth at NRF in January.

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• Solved: Chrome v18, self signed certs and &ldquo;signed using a weak signature algorithm&rdquo;

  - by David Christiansen

  So chrome has just updated itself automatically and you are now running v18 – great. Or is it… If like me, you are someone that are running sites using a self-signed SSL Certificate (i.e. when running a site on a developer machine) you may come across the following lovely message; Fear not, this is likely as a result of you following instructions you found on the apache openssl site which results in a self signed cert using the MD5 signature hashing algorithm. Using OpenSSL The simple fix is to generate a new certificate specifying to use the SHA512 signature hashing algorithm, like so; openssl req -new -x509 -sha512 -nodes -out server.crt -keyout server.key Simples! Now, you should be able to confirm the signature algorithm used is sha512 by looking at the details tab of certificate Notes If you change your certificate, be sure to reapply any private key permissions you require – such as allowing access to the application pool user.

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• Solved: Chrome v18, self signed certs and &ldquo;signed using a weak signature algorithm&rdquo;

  - by David Christiansen

  So chrome has just updated itself automatically and you are now running v18 – great. Or is it… If like me, you are someone that are running sites using a self-signed SSL Certificate (i.e. when running a site on a developer machine) you may come across the following lovely message; Fear not, this is likely as a result of you following instructions you found on the apache openssl site which results in a self signed cert using the MD5 signature hashing algorithm. The simple fix is to generate a new certificate specifying to use the SHA1 signature hashing algorithm, like so; openssl req -new -x509 -sha1 -nodes -out server.crt -keyout server.key Simples!

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• 14.04 Chinese Ibus Input - No Options

  - by RhZ

  getting my new 14.04 rig going ;-) Pretty happy with it, everything seems to be working great. For Chinese input, however, having a problem. I went through the typical steps, open language in settings, let it install some stuff, then add Chinese and choose Ibus. Then, after logging in and out, I see the language icon in my system tray. However, when I go to add the Chinese into Ibus, it only lets me choose "Chinese", which isn't an input method. It should give me a bunch of choices like pinyin, bopomo or whatever, I only use pinyin so don't know those names. I saw someone online had a little command which helped people with similar problems, but it did not work for me, even after a re-start. So, anyone got a solution? Edit: Here is what it looks like, just "Chinese" in the list, when there should be a bunch of input options like pinyin, potomofo, and so on.

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• South African MVPs deserve their title.

  - by MarkPearl

  Recently I read a post by someone who felt the Microsoft MVP program had failed. My local experience with the MVP program would tend for me to disagree. On Saturday I attended a free Windows Phone 7 event organized by Robert MacLean and Rudi Grobler both of whom are local MVP’s. First of all, kudos to them for organizing the event which included a free lunch and flash stick and had some great content for a free event. Secondly, this is not the first time that either of these two MVP’s have organized events. They are active in the community, present at the majority of local events and are always approachable and give an “honest” opinion. For me, that is what an MVP stands for and at least in my region I feel that the MVP program is a real success.

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• Using Linux as guest on vmware and sharing connection with windows vista

  - by mike

  I been trying for weeks with vmwware player, now d/l vmwware work station 7, Have a laptop with one built in modem and a usb modem I bought, It works great switching it over from host to use in ubuntu to connect to the net, now when I use that modem from the host to connect online I have no trouble getting ubuntu to share the internet connection, But tried with NAT bridge host and all to get it to work from ubuntu to share the internet connection to windows vista, the host, I know it should work if it works the other way around, I tried setting up my wlan0 eht0 and eth1 to the correct IP can get both systems to notice each other by name and ip, but cant get them to share the connection from guest to host, I've tried iptables and all as well, Can someone please help me out with this? I am sure It is something something I'm over looking, Thanks in advance

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• Java Developers: Is Ant still in the "main stream" for builds? Do we push new developers to learn it?

  - by Sam Goldberg

  We have been slowly replacing batch command files (windows .bat) which were simply jarring up the classes compiled in the developers IDE, with more comprehensive Ant builds (i.e. get from CVS, clean compile, jar, archive, email, etc.) I've spent a lot of time learning (and debugging issues) with Ant, so I'm most comfortable using it for these tasks. But I wonder if Ant is still in as wide usage as it was when I first started learning, or whether "the world has moved on" to something newer (and maybe slicker). (I've started to see more Maven build stuff distributed, which I've never used, for example.) The practical import of this question, is whether I push new developers to learn Ant, or whether they should be learning something else for builds? I'm never too on top of the trends, so it would be great to hear from other Java developers what they think is the best build tool, and what they think new developers should be learning.

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• Where can I locate business data to use in my application?

  - by Aaron McIver

  This question talks about any and all free public raw data which appeared to have valuable pieces but nothing that really provides what I am looking for. Instead of using a socially defined listing of businesses (foursquare), I would like a business listing data set of registered businesses and associated addresses that could then be searchable based on location (coordinates). The critical need is that the data set should be filterable based on varying criteria (give me all restaurants, coffee shops, etc...). If the data is free that is great but anywhere that sells this type of data would also suffice. Infochimps looked like a possibility but perhaps something a bit more extensive exists. Where can I find a free or for fee data set of registered business that is filterable based on type of business and location?

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• Google I/O 2012 - A Master Class in Map Styling

  Google I/O 2012 - A Master Class in Map Styling Scott Shawcroft, Jonah Jones Custom Styled Maps allow developers to customize the look and feel of the underlying Google Maps tiles. This makes it really easy to make a great looking map. You can tailor your map to your message, to your color scheme, or to help emphasize your data. In this class, master maps designers will help you build beautiful, elegant styles that make your maps work for you. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 23 0 ratings Time: 38:21 More in Science & Technology

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