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Pierre-yves Saumont09/05/14
9745 views
4 replies

Do it in Java 8: recursive and corecursive Fibonacci

Calculating the Fibonacci suite is one of the ubiquitous examples we can find on the Internet. Java 8 offers us new possibility to solve this problem using recursion or corecursion.

Maarten Ectors09/05/14
4608 views
0 replies

Instant Big Data Stream Processing = Instant Storm

Every 6 months at Canonical, the company behind Ubuntu, I work on something technical to test our tools first hand and to show others new ideas. This time around I created an Instant Big Data solution, more concretely “Instant Storm”.

Paul Underwood09/04/14
3652 views
0 replies

Getting Started With Composer In PHP

In this tutorial we are going to learn about composer and how we can use it to develop our PHP applications.

Michael Mccandless09/04/14
4262 views
0 replies

Scoring tennis using finite-state automata

For some reason, the scoring system for tennis is very strange. Fortunately, the convoluted logic is easy to express as a finite-state automaton (FSA). If you build this Automaton in Lucene and minimize it, you'll discover that there are some wasted states! This means 20 states is overkill when deciding who won the game.

Mark Needham09/04/14
6646 views
0 replies

R: dplyr - group_by dynamic or programmatic field

In my last blog post I showed how to group timestamp based data by week, month and quarter. I wanted to pull this code out into a function. It turns out if we want to do this then we actually want the regroup function rather than group_by:

Trevor Parsons09/04/14
4197 views
0 replies

What is Syslog?

Syslog has been around for a number of decades and provides a protocol used for transporting event messages between computer systems and software applications. The protocol utilizes a layered architecture, which allows the use of any number of transport protocols for transmission of syslog messages.

Mark Needham09/04/14
3358 views
0 replies

R: ggplot - Cumulative frequency graphs

The first step was to transform the data so that I had a data frame where a row represented a day where a member joined the group. To turn that into a chart we can plug it into ggplot and use the cumsum function to generate a line showing the cumulative total:

Alec Noller09/03/14
9285 views
0 replies

Dev of the Week: Hébert Coelho de Oliveira

Every week here and in our newsletter, we feature a new developer/blogger from the DZone community to catch up and find out what he or she is working on now and what's coming next. This week we're talking to Hebert Coelho De Oliveira, Senior Developer at M4U.

Gil Zilberfeld09/03/14
7512 views
1 replies

Metrics: Good vs. Evil

In our ever going search for simplicity, metrics help us minimize a whole uncertain world into a number. We like that. But metrics are over-simplification. We should use them like that.

Jonas Gauffin09/03/14
4512 views
9 replies

Communicating business rules with methods

Do you use anemic models? i.e. having business classes like “User” without any methods but just properties instead? Do you want to do better but do not know how?

Mark Needham09/03/14
5222 views
0 replies

R: Grouping by week, month, quarter

In my continued playing around with R and meetup data I wanted to have a look at when people joined the London Neo4j group based on week, month or quarter of the year to see when they were most likely to do so.

Alec Noller09/03/14
10110 views
0 replies

The Best of DZone: August 27 - September 3

If you missed anything on DZone this week, now's your chance to catch up! This week's best include the anatomy of Hibernate dirty checking, the similarities of Swift and Scala, the Agile version of Superman vs. Batman, and more.

Andrew Fuqua09/02/14
7287 views
0 replies

Flow Is For Sissies

The moral of the story is that real options thinking, systems thinking and many other such concepts present or yet to come may be more appropriate in some cases than Lean/Kanban thinking. Lean/Kanban thinking is useful, but it isn’t all there is.

Rob Galanakis09/02/14
5278 views
1 replies

Hire talented people and get out of their way?

Today's quote is: "In most cases being a good boss means hiring talented people and then getting out of their way." This advice (hire smart, don’t micromanage) is so simplistic, it’s hardly worth saying. The profound stupidity is equating this with “being a good boss“. No, hiring smart people and not micromanaging them is the absolute, bare minimum you should be doing as a boss.

Anders Abel09/02/14
4027 views
0 replies

A Geek's Nightmare

Last night I woke up after a night mare. A nightmare containing a future, “improved” version of powershell a competing blogger and Entity Framework Migrations. Slightly off topic, but I’ll share it anyway.