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  • A way to store potentially infinite 2D map data?

    - by Blam
    I have a 2D platformer that currently can handle chunks with 100 by 100 tiles, with the chunk coordinates are stored as longs, so this is the only limit of maps (maxlong*maxlong). All entity positions etc etc are chunk relevant and so there is no limit there. The problem I'm having is how to store and access these chunks without having thousands of files. Any ideas for a preferably quick & low HD cost archive format that doesn't need to open everything at once?

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  • Chrome Countdown Extension [migrated]

    - by Mike Saffold
    I have modified this countdown script to countdown to 4:20pm everyday. I have attempted to create a Google Chrome app that displays the countdown. The javascript is supposed replace a paragraph tag with id of "note" with the time left. It works when I load the page in chrome, but does not work when I load the extension. Example, if I put: <p id="note">asdf</a> I get just the text, "asdf", but when I open the html file I get the countdown. Here is the manifest.json file: { "name": "My First Extension", "version": "1.0", "manifest_version": 2, "description": "The first extension that I made.", "browser_action": { "default_icon": "icon.png", "default_popup": "popup.html" } } Here is the popup.html code: <html> <head> <title>4:20PM Countdown</title> <!-- Our CSS stylesheet file --> <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Open+Sans+Condensed:300" /> <link rel="stylesheet" href="http://treesmoke.com/cd/assets/css/styles.css" /> <link rel="stylesheet" href="http://treesmoke.com/cd/assets/countdown/jquery.countdown.css" /> </head> <body> <p id="note">asdf</p> <!-- JavaScript includes --> <script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.min.js"></script> <script type="text/javascript" src="http://treesmoke.com/cd/assets/countdown/jquery.countdown.js"></script> <script type="text/javascript" src="http://treesmoke.com/cd/assets/js/script.js"></script> </body> </html> Here's the popup.html page, showing that the script works. Thanks guys, it isn't that big of a deal if I can't get it to work. I was just bored and decided to learn a little.

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  • Strategy for avoiding duplicate object ids for data shared across devices using iCloud

    - by rmaddy
    I have a data intensive iOS app that is not using CoreData nor does it support iCloud synching (yet). All of my objects are created with unique keys. I use a simple long long initialized with the current time. Then as I need a new key I increment the value by 1. This has all worked well for a few years with the app running isolated on a single device. Now I want to add support for automatic data sync across devices using iCloud. As my app is written, there is the possibility that two objects created on two different devices could end up with the same key. I need to avoid this possibility. I'm looking for ideas for solving this issue. I have a few requirements that the solution must meet: 1) The key needs to remain a single integral data type. Converting all existing keys to a compound key or to a string or other type would affect the entire code base and likely result in more bugs than it's worth. 2) The solution can't depend on an Internet connection. A user must be able to run the app and add data even with no Internet connection. The data should still resolve properly later when the data syncs through iCloud once a connection is available. I'll accept one exception to this rule. If no other option is available, I may be open to requiring an Internet connection the first time the app's data is initialized. One idea I have been toying around with in my head is logically splitting the integer key into two parts. The high 4 or 5 bits could be used as some sort of device id while the rest represents the actual key. The fuzzy part is figuring out how to come up with non-conflicting device ids that fit in a few bits. This should be viable since I don't need to deal will millions of devices. I just need to deal with the few devices that would be shared by a given iCloud account. I'm open to suggestions. Thanks.

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  • Way(s) of browsing the filesystem that are more flexible

    - by ixtmixilix
    I have two related questions, both probably (but not necessarily preferentially) accepting the same answer : When browsing or exploring the filesystem in a GUI, I want to be able to right click on the empty space between the files, choose a menu item and say 'open terminal in this folder,' optionally as root Do the converse when using the terminal, optionally as root I use Universe with kubuntu but have Debian Lenny running with gnome installed separately, so anything on kde or gnome would work

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  • Suddenly the native app is cool again

    <b>The Open Road:</b> "If the future is cloud-based applications, we still have a long way to go to realize that vision. Ironically, we may actually be getting ever further away from it even as the cloud assumes central importance in the computing landscape."

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  • Threads to make video out of images

    - by masood
    updates: I think/ suspect the imageIO is not thread safe. shared by all threads. the read() call might use resources that are also shared. Thus it will give the performance of a single thread no matter how many threads used. ? if its correct . what is the solution (in practical code) Single request and response model at one time do not utilizes full network/internet bandwidth, thus resulting in low performance. (benchmark is of half speed utilization or even lower) This is to make a video out of an IP cam that gives a new image on each request. http://149.5.43.10:8001/snapshot.jpg It makes a delay of 3 - 8 seconds no matter what I do. Changed thread no. and thread time intervals, debugged the code by System.out.println statements to see if threads work. All seems normal. Any help? Please show some practical code. You may modify mine. This code works (javascript) with much smoother frame rate and max bandwidth usage. but the later code (java) dont. same 3 to 8 seconds gap. <!DOCTYPE html> <html> <head> <script type="text/javascript"> (function(){ var img="/*url*/"; var interval=50; var pointer=0; function showImg(image,idx) { if(idx<=pointer) return; document.body.replaceChild(image,document.getElementsByTagName("img")[0]); pointer=idx; preload(); } function preload() { var cache=null,idx=0;; for(var i=0;i<5;i++) { idx=Date.now()+interval*(i+1); cache=new Image(); cache.onload=(function(ele,idx){return function(){showImg(ele,idx);};})(cache,idx); cache.src=img+"?"+idx; } } window.onload=function(){ document.getElementsByTagName("img")[0].onload=preload; document.getElementsByTagName("img")[0].src="/*initial url*/"; }; })(); </script> </head> <body> <img /> </body> </html> and of java (with problem) : package camba; import java.applet.Applet; import java.awt.Button; import java.awt.Graphics; import java.awt.Image; import java.awt.Label; import java.awt.Panel; import java.awt.TextField; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.net.URL; import java.security.Timestamp; import java.util.Date; import java.util.concurrent.TimeUnit; import java.util.concurrent.atomic.AtomicBoolean; import javax.imageio.ImageIO; public class Camba extends Applet implements ActionListener{ Image img; TextField textField; Label label; Button start,stop; boolean terminate = false; long viewTime; public void init(){ label = new Label("please enter camera URL "); add(label); textField = new TextField(30); add(textField); start = new Button("Start"); add(start); start.addActionListener(this); stop = new Button("Stop"); add(stop); stop.addActionListener(this); } public void actionPerformed(ActionEvent e){ Button source = (Button)e.getSource(); if(source.getLabel() == "Start"){ for (int i = 0; i < 7; i++) { myThread(50*i); } System.out.println("start..."); } if(source.getLabel() == "Stop"){ terminate = true; System.out.println("stop..."); } } public void paint(Graphics g) { update(g); } public void update(Graphics g){ try{ viewTime = System.currentTimeMillis(); g.drawImage(img, 100, 100, this); } catch(Exception e) { e.printStackTrace(); } } public void myThread(final int sleepTime){ new Thread(new Runnable() { public void run() { while(!terminate){ try { TimeUnit.MILLISECONDS.sleep(sleepTime); } catch (InterruptedException ex) { ex.printStackTrace(); } long requestTime= 0; Image tempImage = null; try { URL pic = null; requestTime= System.currentTimeMillis(); pic = new URL(getDocumentBase(), textField.getText()); tempImage = ImageIO.read(pic); } catch(Exception e) { e.printStackTrace(); } if(requestTime >= /*last view time*/viewTime){ img = tempImage; Camba.this.repaint(); } } }}).start(); System.out.println("thread started..."); } }

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  • OpenFileDialog in C#

    An OpenFileDialog control is used to browse and select a file on a computer. This article demonstrates how to use a windows Forms open file dialog in C#.

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  • If you had to teach professional development to students that just graduated school, what would be the topics?

    - by user2567
    The idea is to give them more chances to be efficient in a professional environment. Most students are good with theory, most of them are smart, but they have to learn how to solve common technical problems. They will be better programmers as they practice, but maybe we can help them with some introduction training. Which topics you would select for a two weeks full time training? It's an open question, I don't want to suggest things that will reduce the answers to a particular field.

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  • Is there a jQuery lightbox plugin that has thumbnails inside the box?

    - by Gabriel
    I'm trying to find a lightbox style plugin in jQuery that displays thumbnails at the bottom of the picture (or video, or whatever). I found plenty of lightbox plugins, but none that allows navigation by thumbnail inside the box. The plugin must be able to open images, swf and inline content. I realize that jQuery will not be able to generate the thumbnails and that's ok. Do you have any good ones to suggest? Thanks

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  • How to drag widgets from monitor to monitor in kubuntu?

    - by Mien
    I have Kubuntu 12.04 on my Dell Inspiron. I use an extern monitor as my default one, and my laptop monitor as my second monitor. I can place widgets on the extern (default) screen, but when I drag them to the laptop (second) screen, they disappear. I can put widgets on the second screen, if I open the widget screen on that screen, but I can't drag them to my first monitor. How can I switch between monitors for the widgets?

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  • Why Are the Search Algorithms Still So Stupid?

    Anyway, it was back in '96 that I first tried Google (except I think they called it something else back then). It was as if the clouds broke open and the sun shone through. The results were stunningly similar to the object of my query. Prior to Google, you had these directories, the biggest among them Yahoo!

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  • How to connect Nokia Lumia 520 to Ubuntu 12.04

    - by pavankumar
    I have done the following steps: sudo add-apt-repository ppa:langdalepl/gvfs-mtp sudo apt-get update and updated some packages from update manager. After doing above steps I am able to see lumia phone name in file system. But when I try to mount device I am getting following errors: Unable to mount RM-914|Nokia Lumia 520 Unable to open MTP device '[usb:001,010]' Is there any way to solve these problem?

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  • Attending my first software conference - any tips before I go? [closed]

    - by Paul Weber
    My nice employer allowed me to visit a software conference in June (International PHP Conference, for those who care). Wanting to make the most of it, I would ask the more experienced conference goers in here to give me some tips on what I could do to maximize my learning experience on the conference, and to reduce beginner mistakes. Sorry that this question is a little ambiguous, but I think it's best to keep it a little bit more open, so I can get a wide range of Ideas, and it will be of more use to further people seeking for an answer.

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  • How do I install VirtualBox in 13.04?

    - by user155708
    I install the application using the .deb, but I can't get a virtual machine to boot. How to install it correctly from the beginning? Opening my newly-created XP machine yields this message: Failed to open a session for the virtual machine Windows fucking sucks. VT-x features locked or unavailable in MSR. (VERR_VMX_MSR_LOCKED_OR_DISABLED). Result Code: NS_ERROR_FAILURE (0x80004005) Component: Console Interface: IConsole {db7ab4ca-2a3f-4183-9243-c1208da92392}

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  • Does searching documentation and samples look bad?

    - by Mick Aranha
    I am starting a new job in a company with many developers and media people, the layout of the place is open with computers around a skinny oval, I have worked in small teams and programming embedded C, the jobis for objective C I'm still in a medium stage, so I know what I don't know (haha), that means I have to google it and then implement it, So the question is how bad does it look if the guy next to you does lot of searching for coding I mean, at the end of the day I will get the job done, but want to look professional too!

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  • Share folders between PC and Android

    - by Javi
    I want to know how to share any folders between android and ubuntu. I've got it with WindowsXP. In the Android I've the app ES Explorador. I've created a folder in the PC and it is shared. With the app from cellphone I get to found the folther shared but when I try open this, the app say me '' The account has no permissions'' I don't known how to give this permissions. Sorry for my inglish ^^ I'm lerning now.

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  • How to access shared folder in Virtual Box

    - by alsadi90
    I followed the steps for sharing folders between windows 7 and Ubuntu in virtual box. but the folder appear with X sign and give me the following message when open it "the folder conent could not be displayed" and when choose "shared folder" from "Device" menu the following is written below "on the system page , you have asigned more than 50% of your computer's memory (2.93) to the virtual machine ...

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  • Unable to create an Ubuntu 12.10 USB stick on OS X

    - by Hex Bob-Omb
    I'm following the instructions to create a bootable Ubuntu 12.10 USB stick on OS X found here. I can do step 3 and hdiutil appears to work fine, but when I go to mount the resulting ubuntu.img file I get the same "no mountable file systems" error that I get when I try and open the ubuntu.iso file. No correctly sized volumes show up in diskutil list either. Any ideas? Using the most recent ubuntu-12.10-desktop-amd64.iso on Mountain Lion 10.8.2.

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  • Gerrit code review, or Github's fork and pull model?

    - by user1366476
    I am starting a software project that will be team AND community developed. I was previously sold on gerrit, but now github's fork and pull request model seem to almost provide more tools, ways to visualize commits, and ease of use. For someone who has at least a little experience with both, what are the pros/cons of each, and which would be better for a team based project which wants to leave open the possibility for community development?

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  • Which card readers support HID (Human Interface Device) and emulate keyboard input? [closed]

    - by Level1Coder
    I'm looking for a card reader to interface with an inhouse webapp and need it to emulate keyboard input to type the card data (serial number) into a web form. A simple usage scenario would be where I open notepad, have notepad focused as front most, swipe the card, and the card reader can type out the card data into notepad as plain text. As long as this works, the card data can work with any web form. Which card readers supports this kind of keyboard emulation mode?

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  • Running CLOC (count lines of code) on Windows...or alternative

    - by Chelonian
    I'm trying to use CLOC on Windows (XP) to count lines of code, and I can't get it to work. I downloaded the latest Win installer for CLOC 1.5.6, ran it (which caused a "DOS" window to open, scroll with text rapidly, then close before I could read anything) and then wrote cloc at the cmd prompt...and Windows doesn't recognize it as a command. Or if there is another easy-to-use lines of code counter that one could recommend (that runs on Windows), I'd be happy to try that.

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  • Scanning the Error Log with PowerShell

    - by AllenMWhite
    One of the most important things you can do as a DBA is to keep tabs on the errors reported in the error log, but there's a lot of information there and sometimes it's hard to find the 'good stuff'. You can open the errorlog file directly in a text editor and search for errors but that gets tedious, and string searches generally return just the lines with the error message numbers, and in the error log the real information you want is in the line after that. PowerShell 2.0 introduced a new cmdlet...(read more)

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  • Audio not working for Gnome Screencast Ctrl + Alt + Shift + R

    - by Costa
    I can do screencasts by pressing ctrl+alt+shift+r, but I get no sound when I view the videos, I've check my built in mic and headset, they both work on skype and such, I just can't record sound with the gnome built in screencasting. Also, when I open the videos in movieplayer they are in mute by default and there's nothing the the preferences I can find to change that. Any help would be awesome!

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