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  • Finding a small image in a bigger one

    - by tur1ng
    Given an image with a large dimension ( 1.000 x 1.000). What is a good approach to find a small image (e.g. 50 x 50) in the big one? The smaller image can be rotated and differ in the size, but only with a 1:1 ratio. It's not related to any programming language - I'm just interested in pattern recognition. Thank you.

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  • Initialize virtual attributes

    - by Horace Loeb
    I have an IncomingEmail model with an attachments virtual attribute: class IncomingEmail < ActiveRecord::Base attr_accessor :attachments end I want the attachments virtual attribute to be initialized to [] rather than nil so that I can do: >> i = IncomingEmail.new => #<IncomingEmail id: nil,...) >> i.attachments << "whatever" Without first setting i.attachments to [] (put another way, I want this virtual attribute to default to an empty array rather than nil)

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  • Drawing lattices online

    - by lavabo
    This isn't really a programming question but... Is there any way to draw online a lattice for a material, like a compound? i.e. a 3D gridlike pattern? I know there are some applications for drawing mathematical lattices, but the notation to me is unfamiliar - are there simply programs or applets or something for drawing lattices like in a compound?

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  • Conventions for modelling c programs.

    - by Hassan Syed
    I'm working with a source base written almost entirely in straight-c (nginx). It does, however, make use of rich high level programming techniques such as compile-time metaprogramming, and OOP - including run-time dispatch. I want to draw ER diagrams, UML class diagrams and UML sequence diagrams. However to have a clean mapping between the two, consistent conventions must be applied. So, I am hopping someone has some references to material that establishes or applies such conventions to similar style c-code.

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  • Webcam capture and convert to avi

    - by Spidfire
    Im trying to make a program that captures a video from the webcam and sound from the microphone but im getting stuck at the part where ive try to make a movie out of still images ive heard you need to use directshow but it doesnt jet work for me Does someone know a good piece of example code that captures video and sound and can encode it to a file (divx or something like that) ? or some suggestions where to look so i can build it myself (if a other programming language is better for this im happy to know it early. )

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  • Android: Creating custom class of resources

    - by Sebastian
    Hi, R class on android has it's limitations. You can't use the resources dynamically for loading audio, pictures or whatever. If you wan't for example, load a set of audio files for a choosen object you can't do something like: R.raw."string-upon-choosen-object" I'm new to android and at least I didn't find how you could do that, depending on what objects are choosen or something more dynamic than that. So, I thought about making it dynamic with a little of memory overhead. But, I'm in doubt if it's worth it or just working different with external resources. The idea is this: Modify the ant build xml to execute my own task. This task, is a java program that parses the R.java file building a set of HashMaps with it's pair (key, value). I have done this manually and It's working good. So I need some experts voice about it. This is how I will manage the whole thing: Generate a base Application class, e.g. MainApplicationResources that builds up all the require methods and attributes. Then, you can access those methods invoking getApplication() and then the desired method. Something like this: package [packageName] import android.app.Application; import java.util.HashMap; public class MainActivityResources extends Application { private HashMap<String,Integer> [resNameObj1]; private HashMap<String,Integer> [resNameObj2]; ... private HashMap<String,Integer> [resNameObjN]; public MainActivityResources() { super(); [resNameObj1] = new HashMap<String,Integer>(); [resNameObj1].put("[resNameObj1_Key1]", new Integer([resNameObj1_Value1])); [resNameObj1].put("[resNameObj1_Key2]", new Integer([resNameObj1_Value2])); [resNameObj2] = new HashMap<String,Integer>(); [resNameObj2].put("[resNameObj2_Key1]", new Integer([resNameObj2_Value1])); [resNameObj2].put("[resNameObj2_Key2]", new Integer([resNameObj2_Value2])); ... [resNameObjN] = new HashMap<String,Integer>(); [resNameObjN].put("[resNameObjN_Key1]", new Integer([resNameObjN_Value1])); [resNameObjN].put("[resNameObjN_Key2]", new Integer([resNameObjN_Value2])); } public int get[ResNameObj1](String resourceName) { return [resNameObj1].get(resourceName).intValue(); } public int get[ResNameObj2](String resourceName) { return [resNameObj2].get(resourceName).intValue(); } ... public int get[ResNameObjN](String resourceName) { return [resNameObjN].get(resourceName).intValue(); } } The question is: Will I add too much memory use of the device? Is it worth it? Regards,

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  • Pass function as parameter in PHP

    - by Casidiablo
    Hello everybody! I've been wondering whether is possible or not to pass a function as parameter in PHP; I want something like when you're programming in JS: object.exampleMethod(function(){ // some stuff to execute }); What I want is to execute that function somewhere in exampleMethod. Is that possible in PHP? Thank you so much.

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  • HTTPS intercept

    - by Adrian
    I don't know much about SSL, but I've read something and I was wondering if it's possible to intercept the communication between client and server (for example, a company can monitor employees data transfer?). I thought it was a difficult task, but it looks like that it is very simple. When a client requests a https connection the router can be instructed to intercept the key exchange and send to the server and the client it's own public keys (further it can encode/decode the hole traffic). Is it true, or I'm misunderstanding something?

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  • Flex: Is it worth upgrading to Flex 4?

    - by ChrisInCambo
    Hi, I'm in the process of building my first serious Flex application and have started out using Flex 3.4 even though 4.0 was available mainly due to the larger number of resources. But now I feel very comfortable with the Flex API's, is it worth upgrading to Flex 4? What are the benefits? And can I expect much pain when porting my existing code base of only a few thousand lines of code? Cheers, Chris

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  • iPhone clip image with path

    - by huggie
    I would like to clip an image with path. In the book Programming with Quartz there is an example on how to draw a circle clipped by a rectangular path (p.37), and there is also a chapter on image masking with existing image as stencil (Ch.10). But I'm still not sure about how to clip an existing image using path. Is there any example or pointer?

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  • Can User have more than one roles in asp.net

    - by madness800
    I'm developing a web application I want to use the role authentication to control different parts of the website accessibility. But my problem is say I implemented a upload and download functionality on one of the page and I want to have the ability to control a user whether they can either upload or download; or both. So, I'm not exactly sure if the role base authentication can support a user with more than one role to work the way I want it.

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  • Spring + Hessian on Tomcat

    - by ILya
    Hello. I have a task to write a web service with use of Hessian and Spring. Unfortunately there is not enough information so i can't make it work myself... Please can anyone write a simple Hello World for me? My version always shows 404 when accesing with browser... I'm new to java so if smb knows how to help tell me what files of my project to share. Thanks a lot!

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  • ruby class collections

    - by poseid
    how does this work? in irb: >> class A >> b = [1, 2,3] >> end => [1, 2, 3] Is b an instance variable? class variable? how would I access b from outside the class? Is it used for meta-programming?

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  • two dimensional array [closed]

    - by Baiba
    Can someone please write to me source code in Java? I have a task: create a program, that contains two dimensional array (with numbers) and the programm needs to sum zeros in each column and then get out the number of column in which the zeros are least.. thanks!

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  • How to get the current exception without having passing the variable?

    - by Pierre-Alain Vigeant
    I am looking for a way to retrieve the current exception without having to pass it as a variable. Suppose the following code public void MakeItFail() { try { throw new FailException(); } catch // Yes I'm aware that this shouldn't be done, but I don't want to go through all the code base and change it { ShowMessage("An error occured"); } } public void ShowMessage(string message) { // How can I retrieve the exception here } In the watch window, I can use $exception to get the current exception. Is there is a code equivalent?

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  • How to replace empty string with zero in comma-separated string?

    - by dsaccount1
    "8,5,,1,4,7,,,,7,,1,9,3,6,,,8,6,3,9,,2,5,4,,,,,3,2,,,7,4,1,1,,4,,6,9,,5,,,,5,,,1,,6,3,,,6,5,,,,7,4,,1,7,6,,,,8,,5,,,7,1,,3,9," I'm doing a programming challenge where i need to parse this sequence into my sudoku script. Need to get the above sequence into 8,5,0,1,4,7,0,0,0,7,0,1,9,3,6,0,0,8......... I tried re but without success, help is appreciated, thanks.

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  • Is Horde an acceptable framework for PHP groupware development?

    - by Glenn
    I'm working on this project and the customer wants it to integrate with a groupware package including bulk email, calendars, and task lists. He has heard about Horde and Horde GroupWare and is interested in using that. Do you have any developer related experience with Horde? If so, then what were your findings? Did you find it to be stable? What about the framework/API? Was it easy to integrate with?

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  • How to kill process on Remote Desktop Connection?

    - by user118190
    I am working remotely on a Windows Server via Remote Desktop Connection and some process has hung the server. I looked up how to bring up the Task Manager remote (equivalent of locally doing CTRL+ALT+DEL) and I found CTRL+ALT+END and it doesn't seem to work. I tried logging off and logging back on and the system is still up (tried earlier seeing the properties of My Comptuer, FYI). Does anyone know how I can escape this 'hindrance' and star fresh?!?

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  • C#: Whats is the best way to print multiple images?

    - by Murat
    Have a good day, I need to print a large image collection of pictures. If I use something like: printDocument.PrintPage += OnPrintPage; printDocument.Print(); my printing task size in printer queue takes more than 1 GB!. Does abybody suggest how can I print images one by one. Maybe some event like PrintJobIsFinished is available? Thanks for any help. -- Best Regards, Murat

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