Tech Notes

Your project can be on or off. Your project's priority can be changed. Your job can be changed. But the technology is always heading north!

Wednesday, November 4, 2015

A simple way to calculate PageRank in R

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library(igraph) source("http://michael.hahsler.net/SMU/ScientificCompR/code/map.R") # 1->2; 1->3, 2->1, 3->4, 4-...
Tuesday, October 27, 2015

Good articles for shingle, minhash and LSH

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http://matthewcasperson.blogspot.com/2013/11/minhash-for-dummies.html http://infolab.stanford.edu/~ullman/mmds/bookL.pdf   (Chapter 3, rou...
Friday, September 25, 2015

How to override cluster jar files

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If you need to use your own version of a jar file in your map reduce job, you can do so through following steps: 1. Bundle the jar file in...
Saturday, July 25, 2015

Dynamically add jar files to classpath

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    /**      * Adds jar files to classpath.      * @param file the folder for jar files.      * @param classLoader the URLClassLoader   ...
Wednesday, June 10, 2015

Skip Hadoop mapper when condition is satisfied

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If conf is an instance of JobConf: conf.setMapRunnerClass(MyMapRunner.class); A sample of your MyMapRunner,  public class FindAn...
Tuesday, February 3, 2015

Awesome solutions for some super good problems in Cryptograph

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http://webstersprodigy.net/tag/aes/ Just some quotations from above website: One of the biggest reasons I think the class was so good wa...
Monday, December 15, 2014

Simple Java Book

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http://www.programcreek.com/wp-content/uploads/2013/01/SimpleJava1.pdf
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