SparkArt! Part One: Exploring the depths of Mandelbrot Set with Spark

On March the 26th 2012, James Cameron and his submarine craft, Deepsea Challenger, explored the depths of the ocean down to 11km under sea level at 11.329903°N 142.199305°E, an infinitesimal point on the surface of the Earth’s vast Oceans. Could you imagine how incredible it would be to have thousands of “Deep Challengers” reaching the bottom of our planet in parallel? What a map we would get!

The Developer’s Guide to Scala Implicit Values (Part II)

Imagine a rectangular grid of cells, in which each cell has a value – Either black (dead) or white (alive). And imagine that:

  1. Any live cell with two or three live neighbors survives for the next generation.
  2. Any cell with four or more neighbors dies from overpopulation.
  3. Any cell with one or no neighbors dies from isolation.
  4. Any dead cell with exactly three neighbors comes to life.

 

These are the four simple rules of Conway’s Game of Life . You could hardly imagine a simpler set of rules to code on your computer and you wouldn’t expect any interesting result at all, but…

Behold the wonders of its hidden might!

The Developer’s Guide to Scala Implicit Values (Part I)

Implicit parameters and conversions are powerful tools in Scala increasingly used to develop concise, versatile tools such as DSLs, APIs, libraries…

When used correctly, they reduce the verbosity of Scala programs thus providing easy to read code. But their most important feature is that they offer a way to make your libraries functionality extendible without having to change their code nor needing to distribute it.

A great power comes with a great responsibility however. For new comers, as well as for relatively experienced Scala users, they can become a galaxy of confusions and pitfalls derived from the fact that the use of implicit values imply the compiler making decisions not obviously described in the code and following a set of rules with some unexpected results.

This post pretends to shed some light on the use of implicit values. Its content isn’t 100% original, it is just a tourist guide through this full of marvels, and sometimes dangerous, code jungle.
As most of those monstrous things that make us shiver, implicit values are mostly harmless once you get to know them.