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Merge sort in lisp
I’m currently taking (online) MIT’s algorithms course. I needed a good brush-up on algorithms, starting with the basic theory. I’m going to jump in to help a buddy working on a graph database in lisp...
View ArticleOn startups and innovation
Throughout my career I’ve worked at numerous organizations, large and small. Last 5 years I’ve spent doing startups, the previous years were spent at large companies. I prefer small organizations,...
View ArticleNetcap TCP/IP sniffing (proxy)
I find myself lately doing a lot of raw TCP/IP stuff and had a need today to look at a protocol. I know there is Wireshark and similar utilities, but I needed to do something on a remote server, by...
View Articlejconsole/jvisualvm rmi on ec2
I finally figured this out, thanks to Google of course. No single post or documentation solved the issue, but after a 2 hour battle and various options, I finally have it working. If you are running a...
View ArticleDistributed locking made easy
There are various situations when one would use a simple mutex to ensure mutual exclusion to a shared resource. This is usually very simple to accomplish using your favorite language library, but that...
View ArticleOur experience with distributed computing using Gridgain
Intro I’ve been doing distributed computing in various forms for many years. Some at the higher level, some at the lower level and can tell you that with all the research advances and toolkits out...
View ArticleHandling GSM 03.38 encoding
We recently internationalized our application and out requirement was to send SMS messages in different languages. SMS supports GSM 03.38 7 bit encoding as well as you can send messages using UTF-16...
View ArticleFlurry – our 64-bit id generation service
Flurry was inspired by Twitter Snowflake. We had a need for generating unique distributed 64-bit ids to utilize within our applications that are backed by RDBMS. There are numerous approaches to this....
View ArticleCyclical dependency detection in the database
We recently had a need to find cyclical dependencies in our database. This happens to be a rather straightforward graph algorithm issue. The database foreign key constraints form a directed graph....
View ArticleExpress.js dynamic route definitions
Express provides the bare necessities to bootstrap a web application and although due to its non-opinionated nature it is very flexible, bootstrapping a web application requires a bit of work, which...
View ArticleBetter Scala pattern matching with erasure
With many beautiful and some rather repulsive elements in Scala pattern matching is definitely the former. Unfortunately, due to Scala’s reliance on the JVM it suffers from [type erasure]. Scala’s...
View ArticleScala automatic wrapper/delegation with implicits
Back in the Java world, wrapping an existing class for delegation required implementing the same method signatures and then calling the delegator’s method. In scala you can use implicits to easily...
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