Juan Manuel Vicente juanmav

Descartes, Berkeley and Functional Reactive Programming

Functional Reactive Programming (FRP) is generating buzz as an alternative to Object Oriented Programming (OOP) for certain use cases. However, an internet search quickly leads a curious and optimistic reader into the rabbit-hole of monads, functors, and other technical jargon. I’ve since emerged from this dark and lonely place with the realization that these words are mere implementation details, and that the core concepts are far more universal. In fact, the groundwork was laid down many centuries before the first computer, and has more to do with interpretations of reality, than structuring programs. Allow me to explain.

There’s an old thought experiment that goes like this:

Data.gov Catalogue Service for the Web (CSW) API

CSW (Catalogue Service for the Web)

CSW (Catalogue Service for the Web) is an `OGC (Open Geospatial Consortium)`_ specification that defines common interfaces to discover, browse, and query metadata about data, services, and other potential resources.

The difference between XYZ and TMS tiles and how to convert between them

Lots of tile-based maps use either the XYZ or TMS scheme. These are the maps that have tiles ending in /0/0/0.png or something. Sometimes if it's a script, it'll look like &z=0&y=0&x=0 instead. Anyway, these are usually maps in Spherical Mercator.

Good examples are OpenStreetMap, Google Maps, MapBox, MapQuest, etc. Lots of maps.

Most of those are in XYZ. The best documentation for that is slippy map tilenames on the OSM Wiki, and Klokan's Tiles a la Google.

	function NavBar($http) {
	this.date = new Date();
	this.getHttp = function(){
	console.log($http);
	}
	};

	module.exports = NavBar;

	for (var i=1; i <= 20; i++)
	{
	if (i % 15 == 0)
	console.log("FizzBuzz");
	else if (i % 3 == 0)
	console.log("Fizz");
	else if (i % 5 == 0)
	console.log("Buzz");
	else
	console.log(i);