Information Technology Tips

Symfony 1.4 Action plus View Rendering PHPUnit Test I wrote test case for executing action and rendering view test. However testing action plus final rendering result is quite not easy because you need to understand how Symfony 1.4 framework handles web request and rendering model to view internally. I have investigated in the framework a bit and found a solution. Please see the test case example in the next section. Code <?php $basePath = dirname(__FILE__).'/../../../../apps/your_app_name/modules/'; $modulePaths = glob($basePath.'*', GLOB_ONLYDIR); foreach($modulePaths as $modulePath) { require_once $modulePath.'/actions/actions.class.php'; } class ActionsTest extends PHPUnit_Framework_TestCase { public function testActions() { // create stub web request $request = $this->createStubfWebRequest(); // action you would like to test. // you should pass module and action name refelctively $actions = new TargetActions($this

Motivation: Visualize 2 Dimensional Data with Lightweight Way I wrote small java program for calculating Jaccard Similarity among source code in this post . And map into them 2 dimensional map using Multi Dimensional Scaling technique. I have used MDSJ – Multidimensional Scaling for Java . (By the way the library is quite simple and meet my requirement perfectly!! Excellent!!)> Next step is how to visualize the bunch of 2 dimensional (x,y) coordinate data so that human can easily understand. Of course, I am good at Java, I can write some code for visualize data in Java using Swing or Java FX etc. But it's not lightweight way. So, I decided to use HTML5 Canvas + Javascript. Viewer: Html5 Canvas + Javascript The features of the Data Viewer are: Visualize CSV data Expected 3 columns without header row: name

Reusable Code for Execute Any DB Access Code in Transaction In this post, I will show you highly reusable utility code for wrapping and executing original db access code in transaction. Anyway let's show you the code. function executeInTransaction(callable $func) { $conn = new PDO(SERVER_NAME, USERNAME, PASSWORD, DBNAME); try { $conn->beginTransaction(); $func($conn); $conn->commit(); } catch (Exception $ex) { $conn->rollBack(); throw $ex; } } Oh, how to use? You just simply passing your core DB access code as the callable $func argument. Okay, let me show you example in next section. Example Usage First, assume you have following 2 methods for inserting data to DB. CONST SERVER_NAME = 'localhost'; CONST USERNAME = "username"; CONST PASSWORD = "password"; CONS

Compute Source Code Similarity I have tried to analyze source code by various methods recently. In this post, I will show you my artifact - Compute source code similarity based on Jaccard Similarity Coefficient. Jaccard Similarity Coefficient is an common and quick techniqueto compute similarity between 2 documents. You can see more details in Jaccard index or MinHash . My similarity computation strategy is below: Calculate hash value for each line for each files. Create set which contains hashes calculated in the above process for the each files. Compute Jaccard Similarity Coefficient for all combinations of the files. Source Code Now I can show you code snippets for compute source code similarity based on Jaccard Similarity Coefficient. Jaccard Simlarity package com.dukesoftware.utils.text; import java.util.HashSet; import java.util.Set; /** * Jaccard similarity coefficient http://en.wikipedia.org/wiki/MinHash */ public class JaccardSimlarity<T> { priv

Here is the code for iterating each line in file. You simply write lambda expression for processing line and doing something nice. private static void processLine(File file, Consumer<String> lineProcessor) throws IOException{ try(FileReader in = new FileReader(file); BufferedReader br = new BufferedReader(in)){ String line; while ((line = br.readLine()) != null) { lineProcessor.accept(line); } } } The below code is an example usage of processLine method. The code simply print out lines in file. public static void main(String[] args) throws IOException { processLine(new File("c:/temp/test.txt"), System.out::println); }