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Java: Incrementally read/stream a CSV file

I’ve been doing some work which involves reading in CSV files, for which I’ve been using OpenCSV, and my initial approach was to read through the file line by line, parse the contents ...
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Elo Rating System: Ranking Champions League teams using Clojure

As I mentioned in an earlier blog post I’ve been learning about ranking systems and one of the first ones I came across was the Elo rating system which is most famously used to rank ...
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Clojure: All things regex

I’ve been doing some scrapping of web pages recently using Clojure and Enlive and as part of that I’ve had to write regular expressions to extract the data I’m interested in. On ...
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Jersey Client: Testing external calls

  Jim and I have been doing a bit of work over the last week which involved calling neo4j’s HA status URI to check whether or not an instance was a master/slave and we’ve been ...
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neo4j/cypher: Getting the hang of query parameters

For as long as I’ve been using neo4j‘s cypher query language Michael has been telling me to use parameters in my queries but the performance of the queries was always acceptable ...
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Graph Processing: Betweeness Centrality – neo4j’s cypher vs graphstream

Last week I wrote about the betweenness centrality algorithm and my attempts to understand it using graphstream and while reading the source I realised that I might be able to put something ...
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Survivorship Bias and Product Development

A couple of months ago I came across an interesting article by the author of ‘You Are Not So Smart‘ about a fallacy known as ‘Survivorship Bias‘ which Wikipedia defines as: The ...
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No downtime deploy with capistrano, Thin and nginx

As I mentioned a couple of weeks ago I’ve been working on a tutorial about thinking through problems in graphs and since it’s a Sinatra application I thought thin would be a decent ...
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Capistrano: Deploying to a Vagrant VM

I’ve been working on a tutorial around thinking through problems in graphs using my football graph and I wanted to deploy it on a local vagrant VM as a stepping stone to deploying ...
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Clojure: Reading and writing a reasonably sized file

In a post a couple of days ago I described some code I’d written in R to find out all the features with zero variance in the Kaggle Digit Recognizer data set and yesterday I started ...
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