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What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?

...is a good place to start if you already know Haskell arrays, or the vector library. The key stepping stone is the use of shape types instead of simple index types, to address multidimensional indices (and even stencils). The repa-io package includes support for reading and writing .bmp image files,...
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What does “Could not find or load main class” mean?

... I had this problem when I was trying to run a Class with a 3rd party library. I invoked java like this: java -cp ../third-party-library.jar com.my.package.MyClass; this does not work, instead it is necessary to add the local folder to the class path as well (separated by :, like this: java -cp...
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Do I need dependency injection in NodeJS, or how to deal with …?

...e your MyDbConnection module. SuperCoolWebApp.js: var dbCon = require('./lib/mydbconnection'); //wherever the file is stored //now do something with the connection var connection = dbCon.fetchConnection(); //mydbconnection.js is responsible for pooling, reusing, whatever your app use case is //c...
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Spring DAO vs Spring ORM vs Spring JDBC

... The spring-dao lib stopped in version 2.0.8 (January 2008). The classes in spring-dao were copied to spring-tx. So, if you need a class that you find in spring-dao, add the dependency to spring-tx instead. (Source.) ...
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How to generate a random number in C++?

...d()/rand()/time() functions that was used in the question: #include <stdlib.h> #include <time.h> #include <stdio.h> int main(void) { unsigned long j; srand( (unsigned)time(NULL) ); for( j = 0; j < 100500; ++j ) { int n; /* skip rand() readings ...
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Creating an API for mobile applications - Authentication and Authorization

...ar applications) to change authorisation levels The client side security library/application For each supported platform (e.g. Symbian, Android, iOS etc) create a suitable implementation of the security library in the native language of the platform (e.g. Java, ObjectiveC, C etc) The library sh...
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How to use Servlets and Ajax?

...specially Internet Explorer versus others), there are plenty of JavaScript libraries out which simplifies this in single functions and covers as many as possible browser-specific bugs/quirks under the hoods, such as jQuery, Prototype, Mootools. Since jQuery is most popular these days, I'll use it in...
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Java 256-bit AES Password-Based Encryption

... in the correct location. In a JDK, they should be placed under ${jdk}/jre/lib/security Based on the problem description, it sounds like the policy files are not correctly installed. Systems can easily have multiple Java runtimes; double-check to make sure that the correct location is being used. ...
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Differences between Java 8 Date Time API (java.time) and Joda-Time

... Common features a) Both libraries use immutable types. Joda-Time also offers additional mutable types like MutableDateTime. b) Furthermore: Both libraries are inspired by the design study "TimeAndMoney" from Eric Evans or ideas from Martin Fowler ...
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Webfonts or Locally loaded fonts?

...ust me). The JS file loaded by the script (http://ajax.googleapis.com/ajax/libs/webfont/1/webfont.js) is larger than the @font-face declaration, and just looks like a lot more work. And I don't believe loading the actual font itself (the WOFF or TTF) is blocking, so it shouldn't delay things too muc...