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Alternatives to NSMutableArray for storing 2D grid - iOS Cocos2d

- by SundayMonday

I'm creating a grid-based iOS game using Cocos2d. Currently the grid is stored in an NSMutableArray that contains other NSMutableArrays (the latter are rows in the grid). This works ok and performance so far is pretty good. However the syntax feels bulky and the indexing isn't very elegant (using CGPoints, would prefer integer indices). I'm looking for an alternative. What are some alternatives data structures for 2D arrays in this situation? In my game it's very common to add and remove rows from the bottom of the grid. So the grid might start off 10x10, grow to 17x10, shrink to 8x10 and then finally end with 2x10. Note the column count is constant. I've consider using a vector<vector<Object*>>. Also I'm vaguely aware of some type of "fast array" or similar offered by Cocos2d. I'd just like to learn about best practices from other developers!

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Upgrade Ubuntu Server from 11.04 to 11.10 without internet connection

- by Tony Marciano

We have application software that really likes Ubuntu Server 11.10. I need to upgrade several 11.04 servers to this version. Two questions: The servers that need to be upgraded do not have Internet access in our datacenter due to security reasons. I need to download the updates/upgrades to a secure system and then transfer them to the datacenter servers for installation. Is anyone aware of the steps involved? How/where do I get the 11.10 updates from? I don't see an option on the Ubuntu site for downloading specific versions of the OS and/or upgrades.

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Software, script or a tool to automate managing which tests to run

- by laggingreflex

I have a batch file that lists all the test files I have and asks me which test I want to perform, like Test. [U]nit, [I]ntegration : i (user input) Integration. [A]ll, [2][U]serInteraction, [3][R]esultGeneration : u 2 User Interaction. Running "mocha integration\2userint.js" ... So essentially I have configured a batch "option" for each test file I have, which I can choose to run individually or all together. But adding and removing tests is a pain. I have to update the batch file everytime a new file is added or changed. Is there a software, script or a tool, that does this automatically, or makes it easier for me to do so? I basically need it to be aware of and ask me which file(s) I want to test. A GUI with checkboxes would be ultimate! but I'll take anything. I'm working in node.js

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Rel = translation

- by Tom Gullen

I can't find much online about rel="translation" We have tutorials and manual entries which we are going to get users to translate. If the original page in English is: http://www.scirra.com/tutorial/start And there are two translations: http://www.scirra.com/tutorial/es/start (spanish) http://www.scirra.com/tutorial/de/start (german) How would I correctly link all these up? I'm aware at the top of the page I would need to specify the correct IS639-1 code: <html lang="de"> But I'm more interested in letting Google know they are not duplicates but are translated.

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How to create a KDE start application menu launcher that launches the search and launch desktop?

- by davorao

Now i love the plasma-netbook aka the "search and launch" interface but i would want to be able to have it appear on demand and not sit as the desktop default in the back of my windows. So what i imagine is having a application launcher be created which on activation brings up the "search and launch" feature allowing for easy access of your favorites or have that slick interface to find what your looking for. I'm aware that krunner solves a similar use-case but search and launch would be more of an Unity Dash type of search, whereas krunner is more useful when u exactly know what your looking for. And to summarize my question, since I'm clueless as to how this would be done, I'm lookinf for someone who could tell me how hard it would be to do it.

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Google displaying swf menu in SiteLinks

- by m90

I have a website that uses a Flash based menu as its main navigation. A plain HTML fallback version is "lying underneath", the swf is embedded using swfobject. swfobject.embedSWF('MENU.swf', 'menu', '1000', '600', '8.0.0', 'ext/expressInstall.swf', {}, {wmode:'transparent',bgcolor:'#666666'}, {}); Somehow Google now started displaying a link to the swf-file in the SiteLinks (noting [SWF] beforehand) which is pretty ugly as the Flash content gets all scrambled and all you see is a random string of characters and numbers (it looks "hacked" to me, although I do know it is not). Also, the link to the swf is plain useless as it relies on JavaScript-functions in the HTML-document. I already demoted the swf in the Webmaster Tools, yet in some situations the link will still show up. Is anyone aware of this problem (I haven't found too much on this on the Internet) and knows how I can keep the search results from linking to the swf?

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How a .NET Programmer learn Big Data/Hadoop? [on hold]

- by Smith Pascal Jr.

I have been ASP.NET developer for sometime now and I have been reading a lot about Big Data- Hadoop and its future as to how it is the next technology in IT and how it would be useful to create million of jobs in US and elsewhere in the world. Now since Hadoop is an open source big data tool which is managed by Apache Server Foundation Group, I'm assuming I have to be well aware of JAVA - Correct me if I'm wrong. Moreover, How a .NET programmer can learn Big Data and its related technologies and can work professionally full time into this technology? What challenges and opportunities does a .NET professional face while changing the technology platform? Please advice. Thanks

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I want a non admin user to install software. What commands do I need to add to sudoers?

- by Chance

I want to edit the /etc/sudoers file so that a non-admin user can install software via the Software Center in Linux Mint 10. The reason for this is that I want a user to have the capability to install programs, but not make any other configuration changes to the system. So far I have the following (some of these may not make sense, I was just trying whatever I thought of) username ALL= /usr/bin/aptitude username ALL= /usr/bin/dpkg username ALL= /usr/local/bin/apt-get username ALL= /usr/lib/linuxmint/mintUpdate/mintUpdate.py username ALL= /usr/bin/software-center username ALL= /usr/bin/synaptic So far, it allows me to do updates without asking for my password, but it will not let me install software without entering an admin password. I am aware of this question, How can I set the Software Center to install software for non-root users?, but this goes the route of modifying the PolicyKit, whereas I'm interested in a sudo solution, because it seems a simpler way to go.

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What algorithm(s) can be used to achieve reasonably good next word prediction?

- by yati sagade

What is a good way of implementing "next-word prediction"? For example, the user types "I am" and the system suggests "a" and "not" (or possibly others) as the next word. I am aware of a method that uses Markov Chains and some training text(obviously) to more or less achieve this. But I read somewhere that this method is very restrictive and applies to very simple cases. I understand basics of neural networks and genetic algorithms(though have never used them in a serious project) and maybe they could be of some help. I wonder if there are any algorithms that, given appropriate training text(e.g., newspaper articles, and the user's own typing) can come up with reasonably appropriate suggestions for the next word. If not (links to)algorithms, general high-level methods to attack this problem are welcome.

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redirect non-www to www while preserving protocol

- by Waleed Hamra

I am aware of the fact that there are tons of questions in this section and in server fault dealing with redirections from non-www to www URLs. But I couldn't find one dealing with this issue while preserving protocol. I am no mod-rewrite expert, and my code is just copy/pasted... here's what i have: RewriteCond %{HTTP_HOST} ^domain.tld$ [NC] RewriteRule ^(.*)$ http://www.domain.tld$1 [R=301,L] So now http://domain.tld and https://domain.tld are forwarded to http://domain.tld How do i make it so that https stays on https while http stays on http?

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JDeveloper and Upgrading Your JDK on Ubuntu

- by Duncan Mills

One little gotcha, if you, as I did recently, upgrade your JDK on Ubuntu then you may have to make sure you reflect that change in a couple of places for JDeveloper to stay happy. Assuming that you've installed from the jar version of the JDeveloper installer, then the JDK that you specified at install time will be recorded in the .jdev_jdk file in your home directory.However, be aware that this is not the only reference to the absolute path of the JDK. When you run the embedded WebLogic for the first time then the .jdeveloper/system11.1.1.3.37.56.60/DefaultDomain/bin/startWebLogic.shscript will be created, and associated with that, the setDomainEnv.sh script in the same directory. So, if you do want to change the JDK location be sure to change this file as well. (or of course do everything with symbolic links)

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How does one block unsupported web browsers?

- by Sn3akyP3t3

Web browsers with an end of life no longer receive security updates which not only makes them vulnerable to the end user, but I imagine its not safe for the server's which receive visits by them either. Is it practical to block or enforce and notify the end user that their browser is unsafe and unsupported? If so, how would one achieve that? I don't know of any official or crowd-sourced listing with that information to parse and keep up to date. I'm aware that the practice can be custom built with User Agent parsing and feature detection for HTML5 enabled browsers.

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laptop-mode-tools and harddrive spinoff

- by sagarchalise

So I wanted to extend my laptop battery life. After googleing a lot I found many tips and tricks. Some even in this site as well. Then I found this package in synaptic as well laptop-mode-tools. Now I am not well aware of what harddrive spinoffs are, so I have a dilemma of installing this package as it seems to remove acpi support as well. So my question is, how reliable is this package in battery life extension and what configurations should I use with it ? Also I stumbled upon some posts saying spinoffs may kill the harddrive as well. So can anyone clearify with some configuration tips especially for laptop-mode-tools. Thanks in advance

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Securing Mobile Apps in a Bring Your Own Device World

- by Naresh Persaud

As more and more business users begin using their personal devices to access corporate information and resources, the number of network access requests has risen dramatically. Access Management products and strategies that were based on an employee accessing network resources from a single desktop PC were never designed to monitor and manage an employee that is using a desktop and a laptop, a tablet, and a smartphone all from outside the corporate network, and possibly from an unsecured wireless public network. A new approach is needed to manage the types and frequency of mobile app access requests - an integrated Platform Approach to Identity and Access Management that is location and device aware, that can warn you of unusual or high risk access. A platform that provides standard APIs so you can manage your mobile apps the same way that you manage your enterprise apps. View the slideshow below to see how the Oracle Identity Management platform can help you secure your mobile applications and data in a Bring Your Own Device World. Securing access inabyod-world-final-ext View more PowerPoint from OracleIDM

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SVG images grow and create scrollbars when on the server

- by zuko

Okay so I embedded some SVG images into my page and opened it locally on Chrome and it looked fine. I upload the same file to the server and look at the page online and the SVG images have grown by maybe 5-10% and are surrounded by scroll bars like they are overflowing. I think it probably has to do with my lack of knowledge on how SVG and Embed work. What's really puzzling me though, is that it works fine locally. (I have cache disabled.) Help? Thanks. Edit: code HTML: <embed type="image/svg+xml" src="content/web-logo.svg"/> There's no CSS on the image. I'm not sure if I was just wrong before or if I changed something I'm not aware of, but it doesn't appear to be actually changing size anymore. It just decides to stuff it into a scrollbox. pic: https://www.dropbox.com/s/wt1aufi7nl1fpyi/svg-problem.png

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Why using the word "mechanism" in CS?

- by Nick Rosencrantz

I'm not sure about the usage of the word "mechanism" when in fact most of the time what is meant is an algorithm. For instance there's talk about Java's "thread-scheduling mechanism" - why not call it an algorithm and why borrow a term from mechanics where relations sometimes are the opposites than of computer science? I'm aware that an algorithm is considered a "mechanical solution" but is this really the case in fact when a lot of algorithm don't have mechanical representations for instance a file-sharing network that gets quicker and faster as the usage grows, that would be the reverse of a mechanical structure that would go slower when usage grows.

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HTML 5, Fluid Pages and Google Mobile Index

- by Bob

I am currently migrating my site to HTML5, at the same time designing pages so that they are "fluid" and are equally presentable for a mobile or a large screen. I took the fluid approach so as not to have to develop a separate application for mobile devices and I'm pleasantly surprised with the results that look equally as good on an iPhone as they do on a large screen. Then I went into the Google Webmaster Tools facility and became aware of the Google Mobile Index. I'm confused now as HTML5 doesn't seem to be supported by Google Mobile Indexing. Does this mean that when I go live with my new "pride and joy" HTML5 site on a mobile it won't appear on any Google searches as it's not in the Google Mobile Index?

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How to negate current window in gnome shell?

- by k0pernikus

I dislike that most websites use a black font on white background for their sites, as it gets too tiresome for me to read. Back in the days of 11.04, using Gnome2 with compiz, there actually was a Negative feature that could negate the content of any window, making the background black and the font white. Much easier on the eyes for me. Yet since 11.10, using gnome shell with mutter, I have no idea if there is something alike out there. Hence my question: How do I negate the currently active window in gnome shell? I am not interested in alternative methods, e.g. user styles. I am aware of their existence but I find it much easier to just invert the screen by the hit of a key shortcut. I also want the solution to be application-agnostic. As I also from time to time would want to invert libre-office or some other glaringly white application.

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Code review versus pair programming

- by mericano1

I was wondering what is the general idea about code review and pair programming. I do have my own opinion but I'd like to hear from somebody else as well. Here are a few questions, please give me your opinion even on some of the point First of all are you aware of way to measure the effectiveness of this practices? Do you think that if you pair program, code reviews are not necessary or it's still good to have them both? Do you think anybody can do code review or maybe is better done by seniors only? In terms of productivity do you think it suffers from pairing all the times or you will eventually get in back in the long run?

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How to make the switch to C++11?

- by Overv

I've been programming in C++ for a while now, but mostly thinks centered around the low-level features of C++. By that I mean mostly working with pointers and raw arrays. I think this behavior is known as using C++ as C with classes despite me only having tried C recently for the first time. I was pleasantly surprised how languages like C# and Java hide these details away in convenient standard library classes like Dictionaries and Lists. I'm aware that the C++ standard library has many convenience containers like vectors, maps and strings as well and C++11 only adds to this by having std:: array and ranged loops. How do I best learn to make use of these modern language features and which are suitable for which moments? Is it correct that software engineering in C++ nowadays I'd mostly free of manual memory management? Lastly, which compiler should I use to make the most of the new standard? Visual Studio has excellent debugging tools, but even VS2012 seems to have terrible C++11 support.

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Logic in Entity Components Systems

- by aaron

I'm making a game that uses an Entity/Component architecture basically a port of Artemis's framework to c++,the problem arises when I try to make a PlayerControllerComponent, my original idea was this. class PlayerControllerComponent: Component { public: virtual void update() = 0; }; class FpsPlayerControllerComponent: PlayerControllerComponent { public: void update() { //handle input } }; and have a system that updates PlayerControllerComponents, but I found out that the artemis framework does not look at sub-classes the way I thought it would. So all in all my question here is should I make the framework aware of subclasses or should I add a new Component like object that is used for logic.

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How to share my wireless connection to other wireless devices

- by user89464

I am aware that I can share my wired internet connection to other devices wirelessly, but what I need now is a little more complex. I am limited to one device over the wifi but would like my macbook to have internet as well. It's in another room so ethernet is not really an option. I really would like to share the wireless from my ubuntu (it's on more) to other wireless devices. After some light googling I can't find anything even remotely useful as they all involve an ethernet cable at some point. Has anyone here had any luck with anything similar? I am running 12.04 LTS just for reference and have a Belkin G wireless USB device. If anyone knows a possible procedure I can find out about the chipset etc. if needed. I understand there may be hardware limitations.

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USB Audio Device Loopback Through Speakers

- by matto1990

I have a USB turntable which when plugged in to my ubuntu 10.10 machine appears in the audio settings as an input device (USB PnP Audio Device Analog Stereo) like a microphone. What I'd like to be able to do it to have the sound for that audio device played back through the audio output (speaker or whatever). I'm not too worried if there's a slight delay between the audio coming in and it being played out through the speakers. As far as I'm aware this is refereed to as software loopback. I can achieve exactly what I want if I open Audacity, enable software loopback and press record. Obvious this isn't ideal as I don't really want it recording what I'm playing all the time. I know this is possible because of the Audacity example however I'd like to know if there's a way to do it without it recording. I've search around for a while for a piece of software that does this, however I couldn't get anything even close. Any help would be greatly appreciated.

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ASP.NET Pager Supports Keyboard Navigation - v2010 vol 1

Here’s a feature for all your users who are keyboard ninjas. The ASPxPager control now provides better keyboard support - increasing both web site usability and accessibility. If you are using a DevExpress ASP.NET Pager control - either standalone or integrated into our data-aware controls like the ASPxGridView – then you can now navigate to the previous/next page by pressing the CTRL+ARROW key combinations. To see a standalone version of our ASP.NET Pager, check out this slick movie-theme...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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Why after each restart, my local .NET sites take time to load for the first time?

- by Saeed Neamati

I'm developing sites based on .NET platform. I usually deploy these sites on my local IIS, so that I can test them and see their functionality before going live. However, each time I restart windows, it seems that sites take a long time to run for the first time. I know about JIT and I'm also aware of this question, but it doesn't answer my question. Does JIT happens every time you restart windows? Is it related to creation of w3wp.exe process? Why sites are so slow for the first request after each restart?

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