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  • How do I escape spaces in command line in Windows without using quotation marks?

    - by David
    For example what is the alternative to this command without quotation marks: CD "c:\Documents and Settings" The full reason I don't want to use quotation marks is that this command DOES work: SVN add mypathname\*.* but this command DOES NOT work : SVN add "mypathname\*.*" The problem being when I change mypathname for a path with spaces in it I need to quote the whole thing. For example: SVN add "c:\Documents and Settings\username\svn\*.*" But when I try this I get the following error message: svn: warning: 'c:\Documents and Settings\username\svn\*.*' not found

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  • Determine the architecture of a Mac from the command line or script?

    - by Brian Postow
    I'm writing a shell script, and I need to know the archetecture, ie PPC or Intel. Back in the day, there was a program /bin/arch that told you, but my mac doesn't seem to have it... Is there an easy way I can do this? Grep for something in a logfile? call some other program that spits that out as a side effect? It would be nice to know what OS Version I'm running too, but that may not be necessary. thanks

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  • Can a mapped network drive be reconnected from the command line?

    - by Stephen Jennings
    On a daily basis I find myself in the Windows command prompt needing to access a network drive that is mapped but disconnected. I have yet to find a command that will reconnect this drive without unmapping and remapping (which leads to a password guessing game, since I don't own these computers). I would also like to be able to script this so every night the drive is reconnected if it has become disconnected somehow. The fastest solution I currently have is to: Type "start." to open explorer, Alt-D to focus the address bar, type the drive letter I want and press enter, and wait for it to display the drive contents, then finally, close explorer and go back to the command prompt. I know it's a minor inconvenience, but I'm often doing this through a slow VNC or PCAnywhere connection where doing anything through GUI is awful, so I'm just wondering if there's a better solution.

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  • Programmatic, script-based, or command line method to change starting program for user on Windows Server 2000/2003?

    - by Joe Majsterski
    I have written an app that we want to distribute to a large number of customers to be used as the shell program when they log onto their server with a particular admin account. I have figured out how to change the starting program by going to Administrative Tools->Computer Management->System Tools->Local Users and Groups->Users, selecting the properties for the user, going to the Environment tab, and changing the program file name under "Starting program" to my new app. But is there a way I could do this with some code that could be sent out and run on all these servers?

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  • Is there a win32 command line tabifier that supports ... `read details` (revised)?

    - by user55542
    I use an editor that allows me to type in a command to run. In order to see the output without having to redirect it to a file, I precede the command with "cmd /k," which leaves an open cmd.exe window. So I'd like to find a way to catch the call to cmd.exe and pass it onto an application that tabifies cmd.exe, a terminal emulator as it's called. The desired result would be similar to what happens in a tabbed editor, when that editor is to open some file, it does so in another tab, and not in another window. While in a given situation it may be easier to modify the command to redirect output to display in the editor itself, in general it would be more helpful if I could find a way to catch all such calls into one window.

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  • How to plan/manage multi-platform (mobile) products?

    - by PhD
    Say I've to develop an app that runs on iOS, Android and Windows 8 Mobile. Now all three platforms are technically in different program languages. The only 'reuse' that I can see is that of the boxes-and-lines drawings (UML :) charts and nothing else. So how do companies/programmers manage the variation of the same product across different platforms especially since the implementation languages differ? It's 'easier' in the desktop world IMO given the plethora of languages and cross-platform libraries to make your life easier. Not so in the mobile world. More so, product line management principles don't seem to be all that applicable - what is same and variant doesn't really matter - the application is the same (conceptually) and the implementation is variant. Some difficulties that come to mind: Bug Fixing: Applications maybe designed in a similar manner but the bug identification and fixing would be radically different. A bug on iOS may/may-not be existent for that on Android. Or a bug fix approach on one platform may not be the same on another (unless it's a semantic bug like a!=b instead of a==b which would require the same 'approach' to fixing in essence Enhancements: Making a change on one platform would be radically different than on another Code-Design Divergence: They way the code is written/organized, the class structures etc., could be very different given the different implementation environments - leading to further reuse of the (above) UML models. There are of course many others - just keeping the development in sync and making sure all applications are up to the same version with the same set of features etc. Seems the effort is 3x that of a single application. So how exactly does one manage this nightmarish situation? Some thoughts: Split application to client/server to minimize the effect to client side only (not always doable) Use frameworks like Unity-3D that could take care of the cross-platform problem (mostly applicable to games and probably not to other applications etc.) Any other ways of managing a platform line? What are some proven approaches to managing/taming the effects?

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  • chromium-browser --proxy-server debugging

    - by user3678068
    Many places online have pointed out to configure chromium proxy via command can be achieve with the following line chromium-browser --proxy-server=[username]:[password]@[host]:[port] but I got this result on every request. Here's the output in the command line right after executing the previous command. (They do not appear to be relevant. There are no new command line output when I try to visit a page) libGL error: failed to authenticate magic 30 libGL error: failed to load driver: vboxvideo ATTENTION: default value of option force_s3tc_enable overridden by environment. [29551:29551:0606/160459:ERROR:sandbox_linux.cc(268)] InitializeSandbox() called with multiple threads in process gpu-process I have double checked that the proxy credential works with the foxyproxy chrome plugin. What else can I try to figure this out? [Edit] Going to chrome://net-internals/#proxy and reading "Effective proxy settings" if I do chromium-browser with no flags, I get Use DIRECT connections. Source: GSETTINGS if chromium-browser --proxy-server=[host]:[port], I get a message box requesting to login, and under "Effective proxy settings": Proxy server: [host]:[port] if chromium-browser --proxy-server=[user]:[pass]@[host]:[port], "Effective proxy settings" shows: Use DIRECT connections

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  • For Programmers familiar with ACM API? Drawing Initials [closed]

    - by user71992
    Possible Duplicate: For Programmers familiar with ACM API? Drawing Initials I came across an exercise (in the book "The Art and Science of Java" by Eric Roberts) that requires using only GArc and GLine classes to create a lettering library which draws your initials on the canvas. This should be made independent of the GLabel class. I'd like to know the correct approach to use in solving this problem. I'm not sure what I have so far is good enough (I'm thinking it's too long). The questions requires that I use a good Top-Down approach. Here's my code so far: //Passes letters to GLetter objects and draws them on the canvas package artScienceJavaExercises.chapter8; import acm.program.*; //import acm.graphics.*; public class DrawInitials extends GraphicsProgram{ public void init(){ resize(400,400); } public void run(){ //String let = readLine("Letter?: "); letter = new GLetter("l"); add(letter, (getWidth()-letter.getWidth()*2)/2, (getHeight()-letter.getHeight())/2); add(new GLetter("o"), (letter.getX()+letter.getWidth()), letter.getY()); } private GLetter letter; } //GLetter Class package artScienceJavaExercises.chapter8; import acm.graphics.*; import java.awt.*; public class GLetter extends GCompound{ private static final int ONE_THIRD = 30; private static final int ROW_2_HEIGHT = 40; private GArc[] arc = new GArc[4]; private GLine[] line = new GLine[24]; public GLetter(String s){ line[0] = new GLine(0,0, ONE_THIRD, 0); line[1] = new GLine(ONE_THIRD,0, ONE_THIRD*2, 0); line[2] = new GLine(ONE_THIRD*2,0, ONE_THIRD*3, 0); line[3] = new GLine(0,0, 0,ONE_THIRD); line[4] = new GLine(ONE_THIRD,0, ONE_THIRD, ONE_THIRD); line[5] = new GLine(ONE_THIRD*2,0, ONE_THIRD*2, ONE_THIRD); line[6] = new GLine(ONE_THIRD*3,0, ONE_THIRD*3, ONE_THIRD); line[7] = new GLine(0,ONE_THIRD, ONE_THIRD*2, ONE_THIRD); line[8] = new GLine(ONE_THIRD,ONE_THIRD, ONE_THIRD*2, ONE_THIRD); line[9] = new GLine(ONE_THIRD*2,ONE_THIRD, ONE_THIRD*3, ONE_THIRD); line[10] = new GLine(0,ONE_THIRD, 0, ONE_THIRD+ROW_2_HEIGHT); line[11] = new GLine(ONE_THIRD, ONE_THIRD, ONE_THIRD, ONE_THIRD+ROW_2_HEIGHT); line[12] = new GLine(ONE_THIRD*2,ONE_THIRD, ONE_THIRD*2, ONE_THIRD+ROW_2_HEIGHT); line[13] = new GLine(ONE_THIRD*3,ONE_THIRD, ONE_THIRD*3, ONE_THIRD+ROW_2_HEIGHT); line[14] = new GLine(0, ONE_THIRD+ROW_2_HEIGHT, ONE_THIRD, ONE_THIRD+ROW_2_HEIGHT); line[15] = new GLine(ONE_THIRD, ONE_THIRD+ROW_2_HEIGHT, ONE_THIRD*2, ONE_THIRD+ROW_2_HEIGHT); line[16] = new GLine(ONE_THIRD*2, ONE_THIRD+ROW_2_HEIGHT, ONE_THIRD*3, ONE_THIRD+ROW_2_HEIGHT); line[17] = new GLine(0, ONE_THIRD+ROW_2_HEIGHT, 0, ONE_THIRD*2+ROW_2_HEIGHT); line[18] = new GLine(ONE_THIRD, ONE_THIRD+ROW_2_HEIGHT, ONE_THIRD, ONE_THIRD*2+ROW_2_HEIGHT); line[19] = new GLine(ONE_THIRD*2, ONE_THIRD+ROW_2_HEIGHT, ONE_THIRD*2, ONE_THIRD*2+ROW_2_HEIGHT); line[20] = new GLine(ONE_THIRD*3, ONE_THIRD+ROW_2_HEIGHT, ONE_THIRD*3, ONE_THIRD*2+ROW_2_HEIGHT); line[21] = new GLine(0,ONE_THIRD*2+ROW_2_HEIGHT, ONE_THIRD, ONE_THIRD*2+ROW_2_HEIGHT); line[22] = new GLine(ONE_THIRD, ONE_THIRD*2+ROW_2_HEIGHT, ONE_THIRD*2, ONE_THIRD*2+ROW_2_HEIGHT); line[23] = new GLine(ONE_THIRD*2,ONE_THIRD*2+ROW_2_HEIGHT, ONE_THIRD*3, ONE_THIRD*2+ROW_2_HEIGHT); for(int i = 0; i<line.length; i++){ add(line[i]); line[i].setColor(Color.BLACK); line[i].setVisible(false); } arc[0] = new GArc(getWidth(), getHeight(), 106.699, 49.341); arc[1] = new GArc(getWidth(), getHeight(), 23.96, 49.341); arc[2] = new GArc(getWidth(), getHeight(), -23.96, -49.341); arc[3] = new GArc(0,0,getWidth(), getHeight(), -106.699, -49.341); for(int i = 0; i<arc.length; i++){ add(arc[i],0,0); arc[i].setColor(Color.BLACK); arc[i].setVisible(false); } paintLetter(s); } private void paintLetter(String s){ if (s.equalsIgnoreCase("l")){ turnOn(line[3]); turnOn(line[10]); turnOn(line[17]); turnOn(line[21]); turnOn(line[22]); turnOn(line[23]); } else if(s.equalsIgnoreCase("o")){ for(int i = 0; i<4; ++i){ turnOn(arc[i]); } turnOn(line[1]); turnOn(line[10]); turnOn(line[13]); turnOn(line[22]); } } private void turnOn(GObject g){ g.setVisible(true); } } I created a class (GLetter.java) with arrays for GArc and GLine objects. They are positioned in certain ways thereby turning certain Glines and/or GArcs on or off (changing visiblity) would create a pattern for a letter. This Gletter uses the if/else statements to determine which pattern to create - this makes me feel my code is too long. There is another class (DrawInitials.java) that simulates a GraphicsProgram and allows the user to pass certain letters as arguments to the GLetter object. I've used 'L' and 'O' as examples. However, I posted this because I'm not sure I'm using the right approach. That's why I need your help. I feel MY CODE IS TOO LONG! The code above is not the complete project...it only draws letters 'L' and 'O' for now.

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  • What Scripting Program would you choose to recover deleted and missing files?

    - by Steven Graf
    For a private project I'm looking for a command line tool to scan and recover files. I'm working on Gnome 3 (but I could also change my OS if it helps reaching my goal) and must be able to find and recover files on attached devices with formats such as NTFS, Fat32, MAC OS Extended and ext3. Is there a command line script to cover all of them or do I need to use different programs to reach my goal? can you recommend command line tools for these kind of tasks? is one of you willing and able to show me some examples and teach me further?

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  • How to clean launch a GUI app via the Terminal (so it doesn't wait for termination)?

    - by Peter.O
    Some GUI apps launch cleanly via the Terminal command line. Some don't, and they cause the Terminal to wait for the app to terminate. ...and even then, some don't "release" the command line. The mysterious ampersand "&" suffix, seems to cause the terminal to put the process into the background... (but I'm not sure what happens there). Is there a way to launch an app via the Terminal, so that there is no "hang on" effect? ... just like launching something via F2. I'd like to have the command line available again, immediately (without something still in the background and writing out system message in the terminal).

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  • Drag2Up Brings Multi-Source Drag and Drop Uploading to Firefox

    - by ETC
    Last fall we shared Drag2Up with you, a handy little Chrome extension that make it a snap to drag, drop, and upload files to a variety of file sharing sites. Now that same easy sharing is available for Firefox. Just like the Chrome version the Firefox version adds in super simple drag and drop file sharing to your web browsing experience. Drag images, text, and other file types onto any text box and Drag2Up uploads them to the file sharing service you’ve specified in the settings menu such as Imgur, Imageshack, Pastebin, Hotfile, Droplr, and more. Hit up the link below to read more and grab a copy for your Firefox install. Drag2Up [Mozilla Add-ons] Latest Features How-To Geek ETC How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Never Call Me at Work [Humorous Star Wars Video] Add an Image Properties Listing to the Context Menu in Chrome and Iron Add an Easy to View Notification Badge to Tabs in Firefox SpellBook Parks Bookmarklets in Chrome’s Context Menu Drag2Up Brings Multi-Source Drag and Drop Uploading to Firefox Enchanted Swing in the Forest Wallpaper

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  • displaying multi-section html documents - best practices

    - by ecpepper
    I work at a research organization and we publish a lot of large-ish documents, usually organized in sections. What I want to know is how best to present these multi-section documents on our website. Presently, what I do is load the entire document as a single page, with each section as its own div. Then I show and hide divs as needed via a table of contents and "next" and "prev" buttons. The advantages to this are mainly: 1) that you can move between sections very quickly, 2) it produces consistent analytics (when a page is loaded, I know a report is being read). The disadvantages, however, are real: Readers can't take advantage of browser back/forward buttons to move between sections. It's complicated to create direct links to individual sections (I can do it with javascript but it's not easy for other people to grab and share). For long reports, you have to wait for the full report to load before you can move around (and that can include hordes of images and charts). Do other people have thoughts on better ways to organize this? Here's an example of the current system: http://massbudget.org/825

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  • A Multi-Channel Contact Center Can Reduce Total Cost of Ownership

    - by Tom Floodeen
    In order to remain competitive in today’s market, CRM customers need to provide feature-rich superior call center experience to their customers across all communication channels while improving their service agent productivity. They also require their call center to be deeply integrated with their CRM system; and they need to implement all this quickly, seamlessly, and without breaking the bank. Oracle’s Siebel Customer Relationship Management (CRM) is the world’s leading application suite for automated customer-facing operations for Sales and Marketing and for managing all aspects of providing service to customers. Oracle’s Contact On Demand (COD) is a world-class carrier grade hosted multi-channel contact center solution that can be deployed in days without up-front capital expenditures or integration costs. Agents can work efficiently from anywhere in the world with 360-degree views into customer interactions and real-time business intelligence. Customers gain from rapid and personalized sales and service, while organizations can dramatically reduce costs and increase revenues Oracle’s latest update of Siebel CRM now comes pre-integrated with Oracle’s Contact On Demand. This solution seamlessly runs fully-functional contact center provided by a single vendor, significantly reducing your total cost of ownership. This solution supports Siebel 7.8 and higher for Voice and Siebel 8.1 and higher for Voice and Siebel CRM Chat.  The impressive feature list of Oracle’s COD solution includes full-control CTI toolbar with Voice, Chat, and Click to Dial features.  It also includes context-sensitive screens, automated desktops, built-in IVR, Multidimensional routing, Supervisor and Quality monitoring, and Instant Provisioning. The solution also ships with Extensible Web Services interface for implementing more complex business processes. Click here to learn how to reduce complexity and total cost of ownership of your contact center. Contact Ann Singh at [email protected] for additional information.

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  • Test a simple multi-player (upto four players) Android game in single developer machine

    - by Kush
    I'm working on a multi-player Android game (very simple it is that it doesn't have any game-engine used). The game is based on Java Socket. Four devices will connect the game server and a new thread will manage their session. The game server will server many such sessions (having 4 players each). What I'm worried about is the testing of this game. I know it is possible to run multiple android emulators, but my development laptop is very limited in capabilities (3 GB RAM, 2 Ghz Intel Core2Duo and on-board Graphics). And I'm already using Ubuntu to develop the game so that I have more user memory available than I'd have with Windows. Hence, the laptop will burn-to-death on running 4 emulator instances. I don't have access to any android device, neither I have another machine with higher configuration. And I still have to develop and test this game. P.S. : I'm a CS student, and currently don't work anywhere, and this game is college project, so if there are any paid solutions, I cannot afford it. What can I do to test the app seamlessly? ability to test even only 4 clients (i.e. only 1 session) would suffice, its alright if I can't simulate real environment with some 10-20 active game sessions (having 4 players each).

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  • A Cautionary Tale About Multi-Source JNDI Configuration

    - by scott.s.nelson(at)oracle.com
    Here's a bit of fun with WebLogic JDBC configurations.  I ran into this issue after reading that p13nDataSource and cgDataSource-NonXA should not be configured as multi-source. There were some issues changing them to use the basic JDBC connection string and when rolling back to the bad configuration the server went "Boom".  Since one purpose behind this blog is to share lessons learned, I just had to post this. If you write your descriptors manually (as opposed to generating them using the WLS console) and put a comma-separated list of JNDI addresses like this: <jdbc-data-source-params> <jndi-name>weblogic.jdbc.jts.commercePool,contentDataSource, contentVersioningDataSource,portalFrameworkPool</jndi-name> <algorithm-type>Load-Balancing</algorithm-type> <data-source-list>portalDataSource-rac0,portalDataSource-rac1</data-source-list> <failover-request-if-busy>false</failover-request-if-busy> </jdbc-data-source-params> so long as the first address resolves, it will still work. Sort of.  If you call this connection to do an update, only one node of the RAC instance is updated. Other wonderful side-effects include the server refusing to start sometimes. The proper way to list the JNDI sources is one per node, like this: <jdbc-data-source-params> <jndi-name>weblogic.jdbc.jts.commercePool</jndi-name> <jndi-name>contentDataSource</jndi-name> <jndi-name>contentVersioningDataSource</jndi-name> <jndi-name>portalFrameworkPool</jndi-name> <algorithm-type>Load-Balancing</algorithm-type> <data-source-list>portalDataSource-rac0, portalDataSource-rac1, portalDataSource-rac2 </data-source-list> <failover-request-if-busy>false</failover-request-if-busy> </jdbc-data-source-params>(Props to Sandeep Seshan for locating the root cause)

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  • Duplicate content appearing for multi lingual sites

    - by Rocky Singh
    I have a site which has a default url say "http://www.blahblah.com/" (which is default in english language). In my site there is support for multi languages. I am having few links at my home page say "English" "French" "Spanish" etc. and on clicking these links user is redirected to these links: http://www.blahblah.com/en-us/ (English) http://www.blahblah.com/fr-ca/ (French) http://www.blahblah.com/spanish-culture/ (Spanish) and based on culture in the url I am showing the content accordingly to end users in their desired language. Now, this was how my site is. The issue I am getting is with SEO. I noticed Google is considering (I checked via Google web masters) my site pages as duplicate like: 1. http://www.blahblah.com/documents/ and http://www.blahblah.com/en-us/documents/ 2. http://www.blahblah.com/news/ and http://www.blahblah.com/en-us/news and similarly all the pages are considered as a duplicate content in Google webmasters tools. I am worried of this, since I think my site is getting penalized in ranking because of this. Could you drop some idea how to overcome this situation?

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  • Multi-Resolution Mobile Development

    - by user2186302
    I'm about to start development on my first game for mobile phone (I already have a flash prototype completed so it's jsut a matter of "porting" it to mobile and fixing up the code) and plan on hopefully being able to get the game working on iphones and most android devices. I am using Haxe along with OpenFL and HaxeFlixel for development. My question is: What resolution should I design the game in initially and/or what is the best way to develop a game for multiple resolutions. I have found multiple different methods, the best, in my opinion, being strategy 3 on this page: http://wiki.starling-framework.org/manual/multi-resolution_development. However I have some questions about this. First, what would the best base resolution to use be, the guide suggests 240*320 which seems alright to me, although if I chose to use pixel graphics as I most probably will given I'm using HaxeFlixel, I'm not sure if they'll look too blocky on larger screens which I'm not even sure is a problem as it might still look alright. (Honestly, not sure about that and if anyone has any examples of games that use this method and look nice). Finally, please feel free to share whatever methods you use and think is best. For example, HaxeFlixel has a scaling feature that scales the game to fit the exact screen size, but I'm afraid that would lead to blurry and improperly scaled graphics since it would scale by non-integers. But, I'm not sure how noticeable a problem that may or may not be. Although from experience I'm pretty sure it won't look nice and currently I do not think I'm going to go for this option. So, I would really appreciate any help on this subject. Thank you in advance.

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  • Software Design Idea for multi tier architecture

    - by Preyash
    I am currently investigating multi tier architecture design for a web based application in MVC3. I already have an architecture but not sure if its the best I can do in terms of extendability and performance. The current architecure has following components DataTier (Contains EF POCO objects) DomainModel (Contains Domain related objects) Global (Among other common things it contains Repository objects for CRUD to DB) Business Layer (Business Logic and Interaction between Data and Client and CRUD using repository) Web(Client) (which talks to DomainModel and Business but also have its own ViewModels for Create and Edit Views for e.g.) Note: I am using ValueInjector for convering one type of entity to another. (which is proving an overhead in this desing. I really dont like over doing this.) My question is am I having too many tiers in the above architecure? Do I really need domain model? (I think I do when I exposes my Business Logic via WCF to external clients). What is happening is that for a simple database insert it (1) create ViewModel (2) Convert ViewModel to DomainModel for Business to understand (3) Business Convert it to DataModel for Repository and then data comes back in the same order. Few things to consider, I am not looking for a perfect architecure solution as it does not exits. I am looking for something that is scalable. It should resuable (for e.g. using design patterns ,interfaces, inheritance etc.) Each Layers should be easily testable. Any suggestions or comments is much appriciated. Thanks,

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  • Circle-Line Collision Detection Problem

    - by jazzdawg
    I am currently developing a breakout clone and I have hit a roadblock in getting collision detection between a ball (circle) and a brick (convex polygon) working correctly. I am using a Circle-Line collision detection test where each line represents and edge on the convex polygon brick. For the majority of the time the Circle-Line test works properly and the points of collision are resolved correctly. Collision detection working correctly. However, occasionally my collision detection code returns false due to a negative discriminant when the ball is actually intersecting the brick. Collision detection failing. I am aware of the inefficiency with this method and I am using axis aligned bounding boxes to cut down on the number of bricks tested. My main concern is if there are any mathematical bugs in my code below. /* * from and to are points at the start and end of the convex polygons edge. * This function is called for every edge in the convex polygon until a * collision is detected. */ bool circleLineCollision(Vec2f from, Vec2f to) { Vec2f lFrom, lTo, lLine; Vec2f line, normal; Vec2f intersectPt1, intersectPt2; float a, b, c, disc, sqrt_disc, u, v, nn, vn; bool one = false, two = false; // set line vectors lFrom = from - ball.circle.centre; // localised lTo = to - ball.circle.centre; // localised lLine = lFrom - lTo; // localised line = from - to; // calculate a, b & c values a = lLine.dot(lLine); b = 2 * (lLine.dot(lFrom)); c = (lFrom.dot(lFrom)) - (ball.circle.radius * ball.circle.radius); // discriminant disc = (b * b) - (4 * a * c); if (disc < 0.0f) { // no intersections return false; } else if (disc == 0.0f) { // one intersection u = -b / (2 * a); intersectPt1 = from + (lLine.scale(u)); one = pointOnLine(intersectPt1, from, to); if (!one) return false; return true; } else { // two intersections sqrt_disc = sqrt(disc); u = (-b + sqrt_disc) / (2 * a); v = (-b - sqrt_disc) / (2 * a); intersectPt1 = from + (lLine.scale(u)); intersectPt2 = from + (lLine.scale(v)); one = pointOnLine(intersectPt1, from, to); two = pointOnLine(intersectPt2, from, to); if (!one && !two) return false; return true; } } bool pointOnLine(Vec2f p, Vec2f from, Vec2f to) { if (p.x >= min(from.x, to.x) && p.x <= max(from.x, to.x) && p.y >= min(from.y, to.y) && p.y <= max(from.y, to.y)) return true; return false; }

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  • Sharding / indexing strategy for multi-faceted search

    - by Graham
    I'm currently thinking about our database structure and how we modify it for scale. Specifically, we're thinking about using ElasticSearch to provide our search functionality. One common pattern with ElasticSearch seems to be the 'user-routing' pattern; that is, using routing to ensure that any one user's data resides on the same shard. This is great for client-specific search e.g. Gmail. Our application has a constraint such that any user will have a maximum of a few thousand documents, so this pattern seems like a good candidate. However, our search needs to work across all users, as well as targeting a specific user (so I might search my content, Alice's content, or all content). Similarly, we need to provide full-text search across any timeframe; recent months to several years ago. I'm thinking of combining the 'user-routing' and 'index-per-time-interval' patterns: I create an index for each month By default, searches are aliased against the most recent X months If no results are found, we can search against previous X months As we grow, we can reduce the interval X Each document is routed by the user ID So, this should let us do the following: search by user. This will search all indeces across 1 shard search by time. This will search ~2 indeces (by default) across all shards Is this a reasonable approach, considering we may scale to multi-million+ documents? Or should I be denormalizing the data somehow, so that user searches are performed on a totally seperate index from date searches? Thanks for any pros-cons of the above scenario.

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  • Permission denied error when trying to install with wubi

    - by badri
    I run into problem when tried to install Ubuntu 11.04 on Windows 7 using wubi installer . It downloads the image for sometime and ends up with the error that says Permission denied: for more details see the log file In the log it seems to be like DownloadError: Problem connecting to tracker - urlopen error (10060, 'Operation timed out') but my network is good and I checked it. Tried using wubi several times, but ends up with same problem. Log content: 10-08 16:56 DEBUG TaskList: ### Finished get_metalink 10-08 16:56 DEBUG TaskList: New task download 10-08 16:56 DEBUG TaskList: ### Running download... 10-08 16:56 DEBUG btdownloader: downloading http://releases.ubuntu.com/11.04/ubuntu-11.04-desktop-amd64.iso.torrent > C:\ubuntu\install\ubuntu-11.04-desktop-amd64.iso 10-08 18:02 ERROR TaskList: Traceback (most recent call last): File "\lib\bittorrent\RawServer.py", line 229, in listen_forever File "\lib\wubi\backends\common\btdownloader.py", line 70, in error_callback DownloadError: Traceback (most recent call last): File "\lib\bittorrent\RawServer.py", line 221, in listen_forever File "\lib\bittorrent\Rerequester.py", line 96, in fail File "\lib\wubi\backends\common\btdownloader.py", line 70, in error_callback DownloadError: Problem connecting to tracker - urlopen error (10060, 'Operation timed out') Traceback (most recent call last): File "\lib\wubi\backends\common\tasklist.py", line 197, in __call__ File "\lib\wubi\backends\common\btdownloader.py", line 79, in download File "\lib\bittorrent\download.py", line 303, in download File "\lib\bittorrent\RawServer.py", line 256, in listen_forever File "\lib\wubi\backends\common\btdownloader.py", line 70, in error_callback DownloadError: Traceback (most recent call last): File "\lib\bittorrent\RawServer.py", line 229, in listen_forever File "\lib\wubi\backends\common\btdownloader.py", line 70, in error_callback DownloadError: Traceback (most recent call last): File "\lib\bittorrent\RawServer.py", line 221, in listen_forever File "\lib\bittorrent\Rerequester.py", line 96, in fail File "\lib\wubi\backends\common\btdownloader.py", line 70, in error_callback DownloadError: Problem connecting to tracker - urlopen error (10060, 'Operation timed out') 10-08 18:02 ERROR TaskList: Non fatal error Traceback (most recent call last): File "\lib\bittorrent\RawServer.py", line 229, in listen_forever File "\lib\wubi\backends\common\btdownloader.py", line 70, in error_callback DownloadError: Traceback (most recent call last): File "\lib\bittorrent\RawServer.py", line 221, in listen_forever File "\lib\bittorrent\Rerequester.py", line 96, in fail File "\lib\wubi\backends\common\btdownloader.py", line 70, in error_callback DownloadError: Problem connecting to tracker - urlopen error (10060, 'Operation timed out') in task download 10-08 18:02 DEBUG TaskList: ### Finished download 10-08 18:02 ERROR TaskList: [Errno 13] Permission denied: u'C:\\ubuntu\\install\\ubuntu-11.04-desktop-amd64.iso' Traceback (most recent call last): File "\lib\wubi\backends\common\tasklist.py", line 197, in __call__ File "\lib\wubi\backends\common\backend.py", line 492, in get_iso File "\lib\wubi\backends\common\backend.py", line 347, in download_iso OSError: [Errno 13] Permission denied: u'C:\\ubuntu\\install\\ubuntu-11.04-desktop-amd64.iso' 10-08 18:02 DEBUG TaskList: # Cancelling tasklist 10-08 18:02 DEBUG TaskList: # Finished tasklist 10-08 18:02 ERROR root: [Errno 13] Permission denied: u'C:\\ubuntu\\install\\ubuntu-11.04-desktop-amd64.iso' Traceback (most recent call last): File "\lib\wubi\application.py", line 57, in run File "\lib\wubi\application.py", line 131, in select_task File "\lib\wubi\application.py", line 157, in run_installer File "\lib\wubi\backends\common\tasklist.py", line 197, in __call__ File "\lib\wubi\backends\common\backend.py", line 492, in get_iso File "\lib\wubi\backends\common\backend.py", line 347, in download_iso OSError: [Errno 13] Permission denied: u'C:\\ubuntu\\install\\ubuntu-11.04-desktop-amd64.iso'

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