Norbert Pap

we are a digital agency focusing on graphic_design and web_development.

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Schepps Design

Schepps Design is a web design / mobile responsive and graphic design provider that creates high-end all original customized content.

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Barbell Rocker

The Barbell Rocker is a collective of crossfit & weightlifting enthusiasts who built their own brand because they didn’t find what they need when it comes to crossfit clothing.

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Umberto Cesari

The new Umberto Cesari on line presence has been launched as a natural extension of the wines produced by the company following an Holistic Approach to address the user experience.

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zozothemes.com

Hydd is a most versatile theme we have ever built, and quite possible the only theme you will ever need. It is ultimate flexible with loads of nice options and features.

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Understanding Elixir’s Ecto Querying DSL: The Basics

This article will take a look at the basics of querying with Ecto, a domain-specific language (DSL) for writing queries and interacting with databases in Elixir. This will involve going through joins, associations, aggregation functions, and so on.

A basic knowledge of Elixir is assumed, and knowing the fundamentals of Ecto beforehand will help too.

Ectoing Application

All of the examples in this article series can be run against my demonstrative Ectoing application. I highly encourage you to set this up (as described below) and run all of the queries as you read along. This will help to solidify your understanding by playing around with the examples to see what works and what doesn't work.

Let's quickly set up the application:

git clone http://ift.tt/28ScwyY
cd ectoing
mix deps.get

# don't forget to update the credentials in config/config.exs
mix ecto.create
mix ecto.migrate

# populate the database with some dummy data
mix run priv/repo/seeds.exs

(I've chosen to use MySQL for this. The examples throughout this article should work uniformly across all supported databases, so whilst the Mariaex dependency could be switched out to use another database, I would advise against this. This is because some examples in the next article will contain MySQL-dependent code.)

The database structure is as follows:

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OkHttp, the Android HTTP Client from Square

Most apps need network connections to external services to access and exchange data. This is typically through REST APIs and an HTTP client in your app. OKHttp is an Android HTTP client library from square that reduces the steps needed, and means you can spend more time on the important areas of your app.

Why OkHttp?

It's a simple library to use, loading data faster and saving bandwidth. It removes the need for network testing, recovering from common connection problems, and on a connection failure, OkHttp can retry the request with a different route.

OkHttp supports Android 2.3 and above, which is more than 99% of the market based on current statistics of version usage.

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