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• Matching a rotated bitmap to a collage image

  - by Dmi

  Hi, My problem is that I have an image of a detailed street map. On this map, there can be a certain small image of a sign (such as a traffic light icon) rotated at any angle, maybe resized. I have this small image in a bitmap. Is there any algorithm or technique by which I can locate this bitmap if a copy of it exists, rotated and maybe resized, in the large collage image? This is similar to the problem with Augmented Reality and locating the marker image, but mine is only 2D with no perspective distortion.

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• running Hadoop software on office computers (when they are idle)

  - by Shahbaz

  Is there a project which helps setup a Hadoop cluster on office desktops, when they are idle? I'd like to experiment with Hadoop/MR/hbase but don't have acces to 5-10 computers. The computers at work are idle after hours and are connected to each other through a very high speed connection. What's more, data on these computers stays within our network so there is no privacy issue. In order for this to work I need a fairly light weight monitor running on each machine. When the computer has been idle for X hours, it will join the cluster. If the user logs on, it has to drop out of the cluster and return all CPU/memory back. Does something like this exist?

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• I'm an idiot/blind and I can't find why I'm getting a list index error. Care to take a look at these 20 or so lines?

  - by Meff

  Basically it's supposed to take a set of coordinates and return a list of coordinates of it's neighbors. However, when it hits here:if result[i][0] < 0 or result[i][0] >= board.dimensions: result.pop(i) when i is 2, it gives me an out of index error. I can manage to have it print result[2][0] but at the if statement it throws the errors. I have no clue how this is happening and if anyone could shed any light on this problem I'd be forever in debt. def neighborGen(row,col,board): """ returns lists of coords of neighbors, in order of up, down, left, right """ result = [] result.append([row-1 , col]) result.append([row+1 , col]) result.append([row , col-1]) result.append([row , col+1]) #prune off invalid neighbors (such as (0,-1), etc etc) for i in range(len(result)): if result[i][0] < 0 or result[i][0] >= board.dimensions: result.pop(i) if result[i][1] < 0 or result[i][1] >= board.dimensions: result.pop(i) return result

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• Class library reference problem

  - by Anindya Chatterjee

  I am building a class library and using its default namespace as "System". There suppose I am creating a generic data structure say PriorityQueue and putting it under System.Collections.Generic namespace. Now when I am referencing that library from another project, I can't see PriorityQueue under "System.Collections.Generic" namespace anymore. Though the library is referenced I can not access any of the classes in it. Can anyone shed some light on it please. I know that if I change the namespace everything will be ok, but I want to create a seamless integration like .net framework itself with other project, so that one can refer the library and forget about its namespaces.

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• android browser downloadfile.bin (wordpress cf7)

  - by roman

  i got a little problem with a wordpress site that uses contact form 7 and android browser (at least android v1.5). when a user submits the cf7 form (using ajax followed by a js redirect) and tries to return to the forms page later (using the back button as well as opening the form's url) the download prompt for a 'downloadfile.bin' appears. this behavior can not be reproduced on any other mobile or desktop browsers. could anyone shed some light on this issue? thank you in advance!

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• how to log digester with apache commons?

  - by Bruce

  Hi all I'm having trouble getting digester to log anything. I'd be hugely grateful for any light anyone can shed. In my code I'm doing this: Digester digester = new Digester(); .. some digester set up stuff // What on earth should go in here???? digester.setLogger(LogFactory.getLog("org.apache.commons.logging.Log")); I have a commons-logging.properties file in my classpath as follows: org.apache.commons.logging.Log=org.apache.commons.logging.impl.SimpleLog org.apache.commons.logging.simplelog.log.org.apache.commons.digester.Digester=debug org.apache.commons.logging.simplelog.log.org.apache.commons.digester.Digester.sax=info I just get no debug info at all.. Thanks for your help!

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• Android: Custom Clock widget Service work-around?

  - by Anthony Forloney

  I was interested in developing a clock widget for the homescreen and upon reading Home Screen Widgets tutorial, is there a pre-existing Service I could reference for updating the current time rather than re-inventing the wheel? I have currently Retro Clock on my android phone and noticed that when I click it, it pops up the Alarm Clock settings, but with the default Google Analog Clock widget, upon click does nothing. Is that because the Retro Clock widget implements the Alarm Clock service? If so, how can I go about referencing that service? Or do I have this all wrong and misunderstood? Any help is appreciated. EDIT: I believe implementing the service to update the clock would drain the battery life tremendously, any ideas on a work around or help shed some light on any performance issues with using Service?

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• Need some testcases on solving this problem

  - by user285825

  I am trying to solve the minesweeper problem of acm problemset archive, http://uva,onlinejudge,org/index,php?option=com_onlinejudge&Itemid=8&category=13&page=show_problem&problem=1130 I tested with all the possible cases that I can imagine of: 1, minimum 1 1 , 1 1 # 2, maximum upto 100 upto 100 repeat until 100 3, for each position I test for mine 4 4 ,,, ,,,, ,,,, 4 4 ,#,, ,,,, ,,,, ,,,, lastly 4 4 ,,,, ,,,, ,,,, ,,,# 4, for each postion I put a ',' and surround it with mines 4 4 ,### # # # 4 4 , # # # lastly 4 4 # # # , I thought that these are reasonable and representative sets of testcases, But still Wrong answer, I am not sure what else could I test for, I would be glad if someone throw some light on further strategy to test this thing,

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• Facebook like iframe ignores my specified href

  - by Zhami

  I have Javascript that imputes (computes and injects) HTML into my DOM for the Facebook "Like" function. I need to specify a "canonical" URL because the actual URL doesn't reflect all the DOM manipulations that have been made (driven by user activity on the Web "page"). Alas, Facebook's code doesn't use the url I supply but the window.location value (which has #hash aspects that influence the page's presentation, but that aren't accessible to the server). Anyway... why is FB's code ignoring the url I give to it? I generate the HTML thus: var html = '<iframe src="http://www.facebook.com/plugins/like.php?href=' + encodeURI(url) + '&layout=standard&show_faces=false&width=100&action=recommend&font=arial&colorscheme=light" style="border:none; overflow:hidden; width:270px; height:26px;" allowTransparency="true" frameborder="0" scrolling="no"</iframe'

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• Objective-C: Initializing char with char at index of string.

  - by Mr. McPepperNuts

  unichar myChar = [myString characterAtIndex:0]; [myNSMutableArray addObject:myChar]; I am trying to insert the first char of a string into an array, to create an array of chars. the first line does not give me an error. The second line however, provides the following error: warning: passing argument 1 of 'addObject:' makes pointer from integer without a cast This also crashes the application with a "bad address" error. I thought this error was due to a problem with memory allocation. Can someone shed some light on this.

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• Halting Django's dev server via page request?

  - by Ben Blank

  I'm looking at writing a portable, light-weight Python app. As the "GUI toolkit" I'm most familiar with — by a wide margin! — is HTML/CSS/JS, I thought to use Django as a framework for the project, using its built-in "development server" (manage.py runserver). I've been banging on a proof-of-concept for a couple hours and the only real problem I've encountered so far is shutting down the server once the user has finished using the app. Ideally, I'd like there to be a link on the app's pages which shuts down the server and closes the page, but nothing I see in the Django docs suggests this is possible. Can this be done? For that matter, is this a reasonable approach for writing a small, portable GUI tool?

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• ack misses results (vs. grep)

  - by techpeace

  I'm sure I'm misunderstanding something about ack's file/directory ignore defaults, but perhaps somebody could shed some light on this for me: mbuck$ grep logout -R app/views/ Binary file app/views/shared/._header.html.erb.bak.swp matches Binary file app/views/shared/._header.html.erb.swp matches app/views/shared/_header.html.erb.bak: <%= link_to logout_text, logout_path, { :title => logout_text, :class => 'login-menuitem' } %> mbuck$ ack logout app/views/ mbuck$ Whereas... mbuck$ ack -u logout app/views/ Binary file app/views/shared/._header.html.erb.bak.swp matches Binary file app/views/shared/._header.html.erb.swp matches app/views/shared/_header.html.erb.bak 98:<%= link_to logout_text, logout_path, { :title => logout_text, :class => 'login-menuitem' } %> Simply calling ack without options can't find the result within a .bak file, but calling with the --unrestricted option can find the result. As far as I can tell, though, ack does not ignore .bak files by default.

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• how to hightlight a div if the page.isvalid=false.

  - by Nimesh

  I wanna high light particular div when the page.isvalid=false. on the pageload i am able to get display the error message. But the issue is that i am not able to highlight the control which is required. I have a js function which sets the error class to the div. Its working fine when i click on a button. On the page load i wanna set this as well. can i do this using some jquery??? or something other way.. Please let me know how to do this.... share your ideas.... Thanks

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• Workstation hardware at does your company buy developers?

  - by Bosh

  I'm curious to know what workstation hardware companies are devoting to you, as a developer -- and how much they're spending. I'd consider this thread a big success if I could shed some light on these questions: Do engineers at big companies use substantially different hardware than engineers at start-ups companies? Does a fresh developer recruit at Google get substantially different hardware from someone in the same position at Microsoft or Yahoo!? Do programmers in more senior positions have more powerful hardware on their desks? Does anyone think faster hardware makes more efficient engineers?

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• Has Google introduced a system that allows multiple "keyword-only" domains per site?

  - by tags2k

  I've been told by a client that "a friend" told them that as of January 2010, Google allows multiple domain names that have keywords in them to be associated with a single site. To be honest this sounds rather April-foolish but I'm not sure when his "friend" told him so for the time being I have to take it at face value. I've heard nothing of this and have searched for such a thing this morning, to find nothing but warnings against this practice. Said client seems keen on buying up lots of domains today, so before he insists upon it I just want to be absolutely sure - has Google silently introduced such an allowance, or is there something else they introduced earlier this year that he could be getting confused with? Thanks for any light you can shine on this!

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• Jquery help for current time indication within a range

  - by Appster

  I'm looking for a simple light-weight jquery plugin that'll help me show something like this in my website: Essentially, this is like a timeline. I know the start and end dates (in that, they don't change) and the position of today's date just gives an indication of how far along I am into a task I took up on Jun 1, 2012. That's all I need it for - a better visual indication of my current status. I've found a lot of jquery timeline plugins but they are too complex for what I'm trying to do. Any ideas or suggestions? Thanks in advance.

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• What is so great about STL?

  - by Zygrob

  Hello StackOverflow. I am a Java developer trying to learn C++. I have many times read over the web (including StackOverflow) that STL is the best collections library that you can get in *any* language. (Sorry, I do not have any citations atm) However after studying some STL, I am really failing to see what makes STL so special. Would you please shed some light on what sets STL apart from the collection libraries of other languages and make it the _best_ collection library? Thanks in advance, Zygr??b.

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• Neural Network Basics

  - by Stat Onetwothree

  I'm a computer science student and for this years project, I need to create and apply a Genetic Algorithm to something. I think Neural Networks would be a good thing to apply it to, but I'm having trouble understanding them. I fully understand the concepts but none of the websites out there really explain the following which is blocking my understanding: How the decision is made for how many nodes there are. What the nodes actually represent and do. What part the weights and bias actually play in classification. Could someone please shed some light on this for me? Also, I'd really appreciate it if you have any similar ideas for what I could apply a GA to. Thanks very much! :)

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• RSS Reader php (have already read related articles)

  - by lightingwrist

  Hey there. I've read all the related articles on here and can't find one that is specific to what I am looking for. I am new to RSS and am looking for the following reader if anyone know's the right direction to throw me in: An rss reader that I can put on my page that does NOT require mysql database A fairly light chunk of code that I can just add as many .xml,rss.php links/addresses to I can wrap div's around to style each segment specifically as possible can manually limit the amount of feeds that are read to conform to my desires of the pages content out put thanks in advance!

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• GetBytes Issue in Loading External Flash

  - by henry

  I'm trying to debug a gallery section within a site of mine. Currently the section display a number of thumbnails which visitor select one to view. Once selected, the main flash loads in an external swf. To make the process smoother, I have a preloader for this process using normal getbytes codes. However for some reasons, the flash works fine in IE but not in Firefox or Chrome. In these browsers, as soon as you click the thumbnail, the preloader animated away to reveal the holder of the external swf. However as it is still loading, the holder is a blank area. Would appreciate if anyone can shed some light on why this is so.

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• Execute a dll function in ASP.Net Bin not working, II7.

  - by Wayne Lo

  I am developing a remote control application where a client (aspx page in a browser) can request a server to "launch a notepad" (for testing purpose, for real life, turning off a light bulb, etc). So I created a dll with a simple function for launching the notepad (on the server side) and dropped this dll in the root bin folder. It worked fine when the aspx page is running under ASP.NET development server (launched from Visual Studio). But when I tested the same aspx page under a FireFox browser, it did not work (launch the notepad) even though it did call for the same function (I stepped through in debugger). Is this a permission issue? How do I set this up in IIS manager, or even better in web.config? Please help.

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• Visual Studio 2010 element names for theming

  - by Anthony Potts

  I am trying to figure out what the element name for the tooltip is in Visual studio so that I can change the style using the extension found here. Anyone know what that is? I am using the default theme which seems to have a white to light grey gradient on it. This is less than optimal since the text for the functions are also white. In a more general question (and perhaps better), is there anything that maps the names as they are found in the theme to where they are in the IDE.

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• Android: How to fade out search / home / menu / back buttons?

  - by user548472

  Hallo, I'm using my Android (Archos 43) only as an extended display in an industrial application. I just need a single programm to display data received and send user inputs by bluetooth. This little programm should start directly after booting and should disable (fade out) the android-buttons (search, home, menu and back). That's my plan. Here's my problem: I know, there are some applications which can fade out these search/home/menu/back-buttons (like DeskClock or some videoplayers). But how does it work? Just using android:theme="@android:style/Theme.Light.NoTitleBar.Fullscreen" only disables the titlebar, not the 4 android-buttons. Thanks, Dennis

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• Is it possible to run C++ binded with SDL+OpenGL code on a web browser?

  - by unknownthreat

  My client wants her website to have an application that renders 3D (light 3D stuff, we are drawing only flat squares in 3D world) but web programming is not my thing. So I am looking for something that can run a C++ program from a web browser. But I think, if this is the case, then the client side must download the program first, and that's not what I want. The client should only be able to use this application only on the website. I came across Google Native Client, which claims that it can run x86 native code in web applications. I haven't decide whether it is worth it or not and I don't know whether this is what I want or not, so I decided to ask experienced people about this. If I want to have something like this, is what I said above possible? Or I completely need other languages like Flex because it does not worth the trouble? Or is Google Native Client suitable for doing something like this?

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• VS 2008 and F# Feb CTP - Can't debug

  - by Steve

  I have downloaded the VS2008 integrated shell, and the F# Feb CTP and I have the F# environment working just fine. The problem comes when I try to debug. Nothing happens at all. The output window says ------ Build started: Project: ConsoleApplication1, Configuration: Debug Any CPU ------ ========== Build: 1 succeeded or up-to-date, 0 failed, 0 skipped ========== and none of my breakpoints are hit. My "program" is as simple as can be #light open System printfn "Hello World" Console.ReadKey(true) with breakpoints on the printfn and Console lines. The things I've read seem to suggest that debugging would work with this setup, and there is a debugger folder under common7/packages with files in it. Thanks for any help. EDIT: I'm on Win7 64 bit

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