Recursos de programación de node
Declarative, Convergent Edge Computation: An Approach for the Internet of Things Consistency is hard and coordination is expensive. As we move into the world of connected ‘Internet of Things’ style applications, or large-scale mobile applications, devices have less power, periods of limited connectivity, and operate over unreliable asynchronous networks. This poses a problem with shared state: how do we handle concurrent operations over shared state, while clients are offline, and ensure that values converge to a desirable result without making the system unavailable? We look at a new programming model, called Lasp. This programming model combines distributed convergent data structures with a dataflow execution model designed for distribution over large-scale applications. This model supports arbitrary placement of processing node: this enables the user to author applications that can be distributed across data centers and pushed to the edge. In this talk, we will focus on the design of the language and show a series of sample applications. About Christopher Meiklejohn Christopher Meiklejohn is a Software Engineer with Basho Technologies, Inc. where he focuses on building rich web applications for Riak using Erlang and JavaScript. Before joining Basho, he worked at Swipely, a loyalty program startup based in Providence where he maintained critical infrastructure components written in Ruby. Christopher is also a graduate student in computer science at Brown University in Providence RI, where he studies formal verification and distributed systems. About Lambda World: The 2016 Lambda World brought together Functional Programming enthusiasts from around the world for two days of presentations, hacking, networking, and a healthy dose of partying in Cadiz, Spain. Hosted by 47 Degrees, the event also featured a Typelevel Community Conference and a Scala Center Hackathon. Join in on the conversation at and using #LambdaWorld. Stay tuned to and for more on the conference and announcements for the 2017 event.
¿Quieres saber más? Índice interactivo aquí debajo: 00:10 Presentación 00:58 What is Couchbase? 01:18 Couchbase Server Defined 06:51 The Power of the Flexible JSON Schema 08:05 Document Fundamentals- Composition 09:31 Storing and Retrieving Documents 10:36 Couchbase Data Access 12:21 Choose how to build your apps. and where to run them 13:58 Docker Support 14:14 Top Use Case 19:32 World of Operational Databases 21:52 Couchbase Architecture 22:58 Couchbase Read Operation 23:10 Write Operation 24:18 Auto sharding-Bucket and vBuckets 25:47 Cluster Map 26:24 Cluster Map-2 nodes added 27:01 Basic Operation 27:26 Add Nodes to Cluster 27:46 Fail Over Node 28:20 Modern Architecture-Multi-Dimensional Scaling 29:41 Demo: Install Couchbase 38:38 Cross Datacenter Replication (XDCR) 39:47 Memory-to-memory, topology aware replication 42:49 Demo: XDCR: Replicate data between clusters 52:10 Languages and Interfaces for Couchbase 52:38 Interacting with Data 52:48 Data Modeling 54:36 Reference Documents for Lookup 55:39 Compound keys: example 56:50 Demo: Code examples: CRUD 1:04:30 Couchbase Query (N1QL) 1:04:37 Why SQL for JSON? 1:04:49 SELECT 1:05:51 Indexing 1:06:46 Data writes 1:07:10 Document-oriented Extensions 1:07:36 Expressions 1:07:55 N1SQL samples 1:15:47 Summary 1:15:48 Develop with Agility 1:16:13 Operate at Any Scale 1:16:35 Dudas
How can our Node.js can be faster? What does faster means? In this journey we would walk through different performance optimization techniques you can apply to your code. We will see start from --v8-options, and we will discover how to leverage what v8 tells us to optimize our code. We will discuss hidden classes, function optimizations and deoptimizations, and inlining. We will discuss the tools and the libraries you can use to do perf analysis on your code. In this journey, we will discover that the main villain is Lord GC, and we will fight him to reclaim our memory!
All of you have been taught that GOOD code is Object Oriented. Why do you find so difficult to write distributed code? Why should be that hard to move a piece of code from the current machines to another? With this talk will explore what Object Oriented code is good and not good for, and why the node.js is an extremely good fit for microservices architectures.
En la charla de mayo, Pablo Cabello nos hablara de su desarollo: RiegoEco. Un sistema en el que, mediante Symfony 2, Node JS y un Arduino, es capaz de controlar el sistema de riego de una plantalación.
Francesc and I are using doo and Karma to run our cljs.test tests on Node.js. This is what we did to make it work. First we installed Node.js, and then, Karma and its CLI following these instructions. Once we had that, we added the doo plugin to the project.clj. doo is a library and leiningen plugin that allows to run cljs.test on different JavaScript environments. Next, we created a new namespace for the unit tests in the tests directory, and set up the test build in project.clj (we called the...
El Jazz suele ser una metáfora muy útil a la hora de hablar del trabajo en equipo y la colaboración entre todos sus miembros para conseguir un objetivo. Las partituras ocupan un lugar secundario en los grupos de Jazz, pero eso no significa que no haya un guión. Hay unas líneas genéricas sobre las que luego se articula la creatividad de la innovación. En definitiva, hay una metodología, unas reglas del juego que dictan dicha colaboración. ¿Y dónde se reúne el grupo? ¿En un local? No. En un mundo globalizado como el actual, nos reuniremos de forma virtual, en la Cloud. El objetivo de esta charla es hablar sobre el desarrollo colaborativo de software siguiendo metodologías ágiles y demostrarlo sobre la plataforma de desarrollo: Bluemix DevOps Services (Codename: Jazz-Hub). Durante la demostración práctica veremos desarrollos en Java EE o Node.JS, la gestión del backlog, gestión de tareas y defectos, la gestión del código y la integración y entrega continua. #5677904553836544/49534002
Anunciamos el octavo meetup de ValenciaJS y primero del año 2016. ¡Seguro que nos echabais de menos! y con esta charla esperamos arrancar un año lleno de meetups.  En esta ocasión Toni nos hará una breve introducción a las características más importantes de ES6 en ​Node.js​. Ejemplo práctico de uso de funciones  generators y promesas como evolución al ​callback hell en​ Node.js.
Desde Node.js y en colaboración con MadridJUG llega el evento de moda en la Comunidad. una mesa redonda entre dos comunidades muy distintas en apariencia pero no tanto en la práctica: Java y Node.js. Moderada por el gran David Bonilla (@david_bonilla), CEO de Otogami, y con los siguientes ponentes de lujo asiático: - Javier Vélez - Javier Abadía - Pedro Palao - Nacho Coloma - Micael Gallego - Leo Antoli