El nucleo de la programacion asincrona son los objetos Task y Task<T>. Ambos son compatibles con las palabras clave async y await.

Primero hay que identificar si el codigo se usa para trabajos enlazados a I/O o si estos son CPU intensivos.

• Si el codigo espera algo como una BBDD o una response de un servidor, es codigo I/O. En este caso hay que usar async y await
• Si el codigo realiza un calculo costoso, es CPU intensivo. Use await para esperar una operacion que se ha comenzado en background con Task.run

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Notes on the course “Mobile Design Course - UX, UI and Design Thinking” from Udemy.

Color Theory
Typography
UI Design
UX Design
Mobile Design Workflow

Notes from the course General UI Design

Design ground rules
Design base properties
Design using color and contrast appropiately
Design with typography and imagery
Creating and simplifying visual cues
UI Design Mantras

Status: Certified!

This notes are my watered-down, personal version of The Scrum Guide 2020 and the following Udemy Course: “Preparation For Professional Scrum Master Level 1 (PSM1)” by Vladimir Raykov.

If you want to get ready for the certification exam, I fully recommend buying and watching his course, several times, in Udemy.

Scrum Guide 2020
1. Scrum Guide 2020 Notes
2. Scrum Glossary

“Preparation For Professional Scrum Master Level 1 (PSM1)” by Vladimir Raykov
1. Scrum Introduction
2. The Scrum Team
3. Scrum Events
4. Scrum Artifacts
5. Scrum Practices and Charts
6. A few words before the Exam
7. Recap of key concepts
8. Possible exam questions

Prepare a fresh linux start
Bash and ZSH commands
VIM advanced commands

This are my Java-related notes. Here I have all the knowledge I refer to when I have doubts about how to use or how to implement a framework / feature I’ve already implemented once.

Version changes

Interesting changes, new functionality and APIs that come to Java with each new version. They don’t include the full changes but the ones I deemed most useful or most interesting.

From Java 8 to Java 11
Java12
Java13

Experience

Small, functional snipets on how to implement a determined feature.

Java experience sheet
How to create a database intermediate table
Java date time API
New script files in Java

Frameworks

How to use and implement determined frameworks in a Java project (using Maven).

Spring in Action (Book)
Spring Cache
Spring Beans
Thymeleaf
Spring Cors

Maven (builder)
Testing (JUnit, TestNG, Mockito)
Vert.x (microservices)
Lombok (builder)
MapStruct (mapper)
Liquibase (database version control)

Splunk take any type of data of millions of entries and allows you to process it into reports, dashboards and alerts.

It’s great at parsing machine data. We can train Splunk to look for certain patterns in data and label those patterns as fields.

Planning Splunk Deployments

A note on config files

Everything Splunk does is governed by configuration files. They’re stored in /etc and they’ve .conf extension.

They’re layered. You can have files with the same name in several directories. You might have a global level conf file and an app specific conf file. Splunk check which one to use based on the current app.

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The new 1Z0-819 certification is the combination of the old existing ones (1Z0-815 & 1Z0-816) together.

OCP Java SE 11 Programmer I - Study guide for 1Z0-815

Welcome to Java
Java Building Blocks
Java Operators
Making Decisions
Core Java APIs
Lambdas and Functional Interfaces
Methods and Encapsulation
Class Design
Advanced Class Design
Exceptions
Java Modules

OCP Java SE 11 Programmer II - Study guide for 1Z0-816

Java Fundamentals
Java Annotations
Generics and Collections

This are personal notes for the GCP Developer certification. If you want to get ready, I fully recommend doing Qwiklabs and Coursera courses to prepare yourself.

Google Cloud Platform (GCP) Fundamentals: Core Infrastructure Introducing Google Cloud Platform
Getting started with GCP
Virtual machines in the cloud
Storage in the cloud
Containers in the cloud
Applications in the cloud
Developing in the cloud
Big Data in the cloud
Machine Learning in the cloud

Getting started with Application Development Best practices for app development
Google Cloud SDK, Client Libraries and Firebase SDK
Data Storage Options
Best practices for Cloud Datastore
Best practices for Cloud Storage

Securing and Integrating Components of your Application Cloud IAM (Identity and Access Management)
OAuth2.0, IAP and Firebase Authentication
Cloud Pub/Sub (needs cleaning)
Cloud Functions (needs cleaning)
Cloud Endpoints (needs cleaning)

App deployment, Debugging and Performance Deploying Applications (needs cleaning)
Execution Environments for your App (needs cleaning)
Debugging, Monitoring and Tuning Performance (needs cleaning)

Course Qwiklabs Setting up a development environment

Extra Qwiklabs

Using the Cloud SDK Command Line Link to course

Getting started with Cloud Shell and gcloud
Configuring networks with gcloud
Configuring IAM permissions with gcloud
gsutil commands for Buckets
gsutil commands for BigQuery

(Disclaimer: This are my personal notes from following Kotlin and Android courses in Udemy. This is a watered-down version from those courses. Check and buy the original courses if you want to find the full resources I used with more detail)

Android

This are my notes on the progress of things I had to learn to go from Java Developer to develop my first Android App with Android in Kotlin.

ViewBinding
DataBinding
MVVM Architecture
Live Data
ViewModel, LiveData, DataBinding
(wip: I still have to order and clean this series of posts from here on)
Recycler View
Navigation Architecture Component
Android Notifications
Coroutines
WorkManager
Android Testing

Extras:
Dagger2 Framework (dependency injection)
Hilt Framework (Dagger2 wrapper)
Room Framework (SQLite)
Android SQLite experience sheet
Android Development experience

Kotlin

This series of posts explain the main differences in language structures and usage between Kotlin and Java languages. I don’t explain the full Kotlin language, but the novelties that Kotlin implements that may be of interest to a Java developer.

From Java to Kotlin - Data Types & Casting
From Java to Kotlin - Operators & Operators Overloading
From Java to Kotlin - Nullable Types & Null Checks
From Java to Kotlin - Control Flow
From Java to Kotlin - Functions, Varargs & Default Parameters
From Java to Kotlin - Standard Library Functions
From Java to Kotlin - Lambdas
From Java to Kotlin - OOP, Companion Objects & Destructuring in Kotlin
From Java to Kotlin - Exceptions & Collections

Extras:
Kotlin cheat sheet with code examples

Scrapy is a web-scrapper & crawler.

Concepts

spider: class that you define and scrapy uses to scrape information from a website (our a group of websites). They must define the initial requests to make, optionally how to follow links in the pages and how to parse the content to extract data

item pipeline: after an item has been crawled by a spider, it’s sent to the item pipeline which processes it through several components that are executed sequentially. You can use them, for example, to save items to a database

How to use

# create a new project
scrapy startproject your_project_name  

# after writing a spider, it starts the crawl
scrapy crawl quotes

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JavaScript library for building user interfaces. Created by Facebook.

Yarn

JavaScript package manager compatible with npm that helps automate the process of installing, updating, configuring, and removing npm packages.

Install

# add Yarn repository
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -  

echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list  

sudo apt-get update  
sudo apt-get install nodejs yarn  
yarn --version # verify

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