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Mark Needham10/09/14
5836 views
0 replies

R: Deriving a new data frame column based on containing string

I’ve been playing around with R data frames a bit more and one thing I wanted to do was derive a new column based on the text contained in the existing column.

Benjamin Ball10/09/14
3060 views
0 replies

There's Finally an Official Hacker News API

They've released the API as part of a longer plan to modernize the markup and frontend of Hacker News to create a more reliable source of real-time data for readers that scrape the site for content and information. They plan to convert to a new Arc-powered engine in the next three weeks.

Ajitesh Kumar10/09/14
3350 views
0 replies

Learn PHP - How to Write A Class in PHP

This article represents some high-level concepts and a code example on how to write a PHP class and use it elsewhere.

Michael Palermo10/08/14
1831 views
0 replies

IsPrime Function in JavaScript

The following code sample illustrates how to use JavaScript to determine if a number provided is a prime number or not. In this example, the number is hardcoded in the JavaScript. You can edit this and experiment with other values at the isPrime at CodePen

Victor Savkin10/08/14
2121 views
0 replies

Add CSS Encapsulation to Your Favorite MV* Framework

CSS encapsulation is one of my favorite features coming to the Web platform. And though it is not supported by the majority of the browsers today, it is pretty easy to polyfil.

Erich Styger10/08/14
3193 views
0 replies

RingBuffer Component with Put/Get/Clear Events

Sometimes I have a good idea how to extend one of my Processor Expert components with an extra feature, but then I step back because why implementing more than I need at the moment? Using the CDE (Component Development Environment) of Processor Expert makes it very easy to such additional events:

Alec Noller10/08/14
12259 views
0 replies

Dev of the Week: Vladimir Šor

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 Vladimir Šor, co-founder and CTO of Plumbr.

Alec Noller10/08/14
11841 views
0 replies

The Best of DZone: Sep. 30 - Oct. 7

If you missed anything on DZone this week, now's your chance to catch up! This week's best include a tutorial for getting started with Play Framework 2.3.4, a look at ARM mbed, a developer's guide to data science, the rise and fall of NoSQL, and more.

Mark Needham10/08/14
6035 views
0 replies

R: Filtering data frames by column type ('x' must be numeric)

I’ve been working through the exercises from An Introduction to Statistical Learning and one of them required you to create a pair wise correlation matrix of variables in a data frame.

Allan Kelly10/08/14
3493 views
0 replies

Estimates or #NoEstimates? That is the question

Maybe it is a navel gazing exercise for agile-folk but it does seem to be the reoccurring theme. And I can’t get over this feeling that some of my peers think I’m a bit stupid for continuing to support estimates.

John Cook10/08/14
1934 views
0 replies

The great reformulation of algebraic geometry

At the Heidelberg Laureate Forum I had a chance to interview John Tate. In his remarks below, Tate briefly comments on his early work on number theory and cohomology. Most of the post consists of his comments on the work of Alexander Grothendieck.

Michael Mainguy10/08/14
4461 views
8 replies

Why OSX sucks and you should use Ubuntu instead

OK, I confess, I use OSX almost exclusively and have for a number of years now. I love the hardware, but the OS and specifically it's lack of a software package management tool has just a level of suckyness that irritates me.

Tom Howlett10/07/14
4757 views
0 replies

Could we really be so wrong?

I hear developers talking of Right and Wrong. What would happen if we got better at describing Cost and Value?

Ayende Rahien10/07/14
2083 views
0 replies

Optimizing event processing

There is a migration process that deals with event sourcing system. So we have 10,000,000 commits with 5 – 50 events per commit. Each event result in a property update to an entity.

Andrew Gilmartin10/06/14
2402 views
0 replies

Streaming content for non-media applications

You can improve your application's user-interface responsiveness by designing a better on-the-wire data format.