Iván Fretes ivanfretes

Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

Example

RESTful API know-how

Motivation

I place my learning process in this document with 2 motives:

To have a quick guide whenever I lost the track of knowledge.
To share the knowledge with anyone wants to learn RESTful APIs

1. Before, some theory

Fetch a Tree with Neo4j

Today I came across a really interesting StackOverflow question:

Given a forest of trees in a Neo4j REST server, I`m trying to return a single tree given the root vertex. Being each tree quite large, I need a de-duplicated list of all vertices and edges in order to be able to reconstruct the full tree on the client side.

ANEXO3: SCAFFOLDING EN RUBY ON RAILS

Hola, que tal amigos de Devcodela,! Les habla Elicia Cordova. Y en este video aprenderemos a generar código de manera fácil y rápida utilizando scaffold en Ruby on Rails.

¿Qué es Scaffold?

Scaffold significa andamio en inglés. Es un generador de código el cual nos permite tener las funcionalidades básicas de administración de un modelo, es decir el CRUD (Create, Read, Update, Delete), y que son típicas para cualquier sistema transaccional. Para el objetivo de este video crearemos dos modelo de datos demo para los usuarios y sus respectivos posts de un blog utilizando el generador de código scaffold.

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	<?php

	// Based on <https://github.com/mecha-cms/x.minify>

	namespace x\minify\_ { // start namespace

	$n = __NAMESPACE__;

	\define($n . "\\token_boolean", '\b(?:true\|false)\b');
	\define($n . "\\token_number", '-?(?:(?:\d+)?\.)?\d+');

	(function($){
	/**
	* Register ajax transports for blob send/recieve and array buffer send/receive via XMLHttpRequest Level 2
	* within the comfortable framework of the jquery ajax request, with full support for promises.
	*
	* Notice the +* in the dataType string? The + indicates we want this transport to be prepended to the list
	* of potential transports (so it gets first dibs if the request passes the conditions within to provide the
	* ajax transport, preventing the standard transport from hogging the request), and the * indicates that
	* potentially any request with any dataType might want to use the transports provided herein.
	*

	<!DOCTYPE html>
	<html>
	<head>
	<title>Leaflet</title>
	<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.3.1/leaflet.css" />
	<script src="http://cdn.leafletjs.com/leaflet-0.3.1/leaflet.js"></script>
	<script src="http://maps.google.com/maps/api/js?v=3.2&sensor=false"></script>
	<script src="http://matchingnotes.com/javascripts/leaflet-google.js"></script>
	</head>
	<body>

	<?php
	/**
	* PostGIS to GeoJSON
	* Query a PostGIS table or view and return the results in GeoJSON format, suitable for use in OpenLayers, Leaflet, etc.
	*
	* @param string $geotable The PostGIS layer name REQUIRED
	* @param string $geomfield The PostGIS geometry field REQUIRED
	* @param string $srid The SRID of the returned GeoJSON OPTIONAL (If omitted, EPSG: 4326 will be used)
	* @param string $fields Fields to be returned OPTIONAL (If omitted, all fields will be returned) NOTE- Uppercase field names should be wrapped in double quotes
	* @param string $parameters SQL WHERE clause parameters OPTIONAL

	#############################################
	# Push de la rama actual
	git push origin $rama_actual

	#############################################
	# Volver a un commit anterior, descartando los cambios
	git reset --HARD $SHA1

	#############################################
	# Ver y descargar Ramas remotas