Articles published in 2012
E-commerce electronic cigarettes: first impressions with Prestashop
Categories: Tech Radar | Tags: HTML, Java, Node.js, Python
Last year, I had to select and integrate an e-commerce software for the website CigarHit selling electronic cigarettes. Considering that the last e-commerce integration I made dated from 2005, I took…
By David WORMS
Jul 25, 2012
Node CSV version 0.2.1
Categories: Node.js | Tags: CoffeeScript, CSV, Release and features, Streaming
After the announcement of the version 0.2.0 of the Node.js CSV parser at the beginning of october, we are releasing today a new version 0.2.1. This is mostly a bug fix release with enhanced…
By David WORMS
Jul 24, 2012
Convert .flac music files to .mp3 on osx
Categories: Hack | Tags: OS X, File Format
As an osx user for years now, one should know by then that iTunes doesn’t support the flac format. We are now in 2012, I’ve been waiting for this to happen since years know. Loosing patience, dark…
By David WORMS
Jul 20, 2012
Node CSV version 0.1 and future developments
Categories: Node.js | Tags: CoffeeScript, CSV, Markdown, Release and features, Streaming
The Node CSV parser has just reach version 0.1 which close the 0.0.x releases. Started almost 2 years ago, the project has received a tremendous amount of participation in the form of bug reports…
By David WORMS
Jul 21, 2012
Hadoop and R with RHadoop
Categories: Business Intelligence, Data Science | Tags: Thrift, Learning and tutorial, R, Hadoop, HBase, HDFS, MapReduce, Data Analytics
RHadoop is a bridge between R, a language and environment to statistically explore data sets, and Hadoop, a framework that allows for the distributed processing of large data sets across clusters of…
By David WORMS
Jul 19, 2012
Installing and using MADlib with PostgreSQL on OSX
Categories: Data Science | Tags: Database, Greenplum, Statistics, PostgreSQL, SQL
We cover basic installation and usage of PostgreSQL and MADlib on OSX and Ubuntu. Instructions for other environments should be similar. PostgreSQL is an Open Source database with enterprise…
By David WORMS
Jul 7, 2012
Asynchronous array iteration in Node.js with Each
Categories: Node.js | Tags: Asynchronous, CoffeeScript, IaC, JavaScript, Release and features
Control flow in Node.js is the sort of library for which almost all the developers have created and publish their own libraries. They usually aim at reducing spaghetti codes made of deep callbacks. I…
By David WORMS
Jul 18, 2012
Node CSV version 0.2 with streaming API
Categories: Node.js | Tags: Data Engineering, CSV, Markdown, Node.js, Streaming
The Node CSV parser in its version 0.2 has just been released. This version is a major enhancement as it aligned the parser with the best Node.js practice in respect of streams. The CSV parser behave…
By David WORMS
Jul 2, 2012
Java versus JS fun, a quote from the Node.js mailing list
Categories: Node.js | Tags: Java, JavaScript, Node.js
I just read that one on the mailing list. I found it relevant enough to share it with those who did not subscribe to it: First Lothar Pfeiler: I still wonder, if it’s cool to have such a big…
By David WORMS
Feb 23, 2012
Two Hive UDAF to convert an aggregation to a map
Categories: Data Engineering | Tags: Business intelligence, Java, HBase, HDFS, Hive, File Format, Storage
I am publishing two new Hive UDAF to help with maps in Apache Hive. The source code is available on GitHub in two Java classes: “UDAFToMap” and “UDAFToOrderedMap” or you can download the jar file. The…
By David WORMS
Mar 6, 2012
A fresh look at testing Node.js projects: Mocha, Should and Travis
Categories: DevOps & SRE, Node.js | Tags: DevOps, Mocha, CI/CD, JavaScript, Node.js, Unit tests
Today, I finally decided to spend some time around Travis. It’s been a few weeks since that little green image on top of many GitHub homepages has been buzzing me. Well, to be totally honest, this isn…
By David WORMS
Feb 19, 2012
HDFS and Hive storage - comparing file formats and compression methods
Categories: Big Data | Tags: Business intelligence, HBase, HDFS, Hive, ORC, Parquet, File Format, Storage
A few days ago, we have conducted a test in order to compare various Hive file formats and compression methods. Among those file formats, some are native to HDFS and apply to all Hadoop users. The…
By David WORMS
Mar 13, 2012
Coffee script, how do I debug that damn js line?
Categories: Hack, Node.js | Tags: Debug, CoffeeScript, JavaScript, Node.js
Update April 12th, 2012: Pull request adding error reporting to CoffeeScript with line mapping Chances are that, if you code in CoffeeScript, you often find yourself facing a JavaScript exception…
By David WORMS
Feb 15, 2012
Announcing Mecano, a set of functions for system deployment
Categories: DevOps & SRE, Node.js | Tags: Automation, Infrastructure, CoffeeScript, IaC, JavaScript, Open source
Update July 2016, Mecano is now renamed Nikita. We are releasing Node Mecano on GitHub which gather common functions used while deploying systems. The idea was to group those functions into a…
By David WORMS
Feb 12, 2012
OS module on steroids with the SIGAR Node binding
Categories: Node.js | Tags: C++, CPU, File system, Metrics, Monitoring, Network
Today we are announcing the first release of the Node binding to the SIGAR library. Visit the project website or the source code repository on GitHub. SIGAR is a cross platform interface for gathering…
By David WORMS
Jan 11, 2012
Timeseries storage in Hadoop and Hive
Categories: Data Engineering | Tags: CRM, timeseries, Tuning, Hadoop, HDFS, Hive, File Format, Storage
In the next few weeks, we will be exploring the storage and analytic of a large generated dataset. This dataset is composed of CRM tables associated to one timeserie table of about 7,000 billiard rows…
By David WORMS
Jan 10, 2012
