Eduardo Zepeda's latests posts

As you probably already know, you should not use prints for debugging. The standard go logging library is much more versatile, it adds dates, filenames and other information, plus you can redirect the logs to standard output, to a file or wherever you want. This can make your debugging process more enjoyable and your go testing easier.

Hey! did you know that I wrote a completely Free Go programming language tutorial?, click here to read it it

Containers, especially Docker containers, are used everywhere, we tend to see them as small isolated operating systems that are inside our system. Using the Docker commands we can modify them, create them, delete them and even get inside them and run commands, but have you ever wondered how they work internally?

We know that a container is a linux process with several characteristics:

• A linux process, or group of processes, executed by a user.
• It is isolated from the operating system that hosts it (Namespaces).
• It has a limited amount of resources (Cgroups).
• It has a file system independent of the operating system in which it runs (Chroot).

To achieve this, docker, and other container technologies, take advantage of some features of GNU/Linux (from now on only linux):

Solr, together with Lucene, is an outstanding search engine that allows you to perform searches with advanced features. In this post I bring you a summary of some of the most interesting features of Solr and Django Haystack.

I assume you already have a configured django app with Solr , in case you don’t, check my previous post.

Behavior of default AND and OR searches

Haystack allows us to define a default behavior for all searches, either by joining terms with AND or OR operators. The default value is AND but you can modify it in the configuration file.

Previously I explained you how to implement full text search in Django and trigrams-and-search-rank using Postgres. Solr comes to offer us something better, a robust, stable and feature-rich search engine, ready to use, in exchange for a little more complexity, more dependencies and having to include Java (yes, Java) in our project.

How does Solr work?

Internally Solr uses Lucene, which is the search engine that is in charge of generating an index to make the queries and all the options related to the searches, Solr adds some extra functions and gives us a friendly interface to work with. From now on I will refer to the union of Lucene and Solr only as Solr.

A git submodule is a record within a git repository that points to a commit in an external repository. They are handled exactly as you would with a repository, they even have a .git file that points to the location where a changelog is kept.

git submodules are useful when we want to incorporate third-party code into a project and at the same time we want to keep strict control of the updates of that code through git. For example:

What is codewars?

Codewars is a social network of programmers who get together to challenge each other to solve code challenges. Codewars is one of the best websites for practicing algorithms and solving Katas. Katas? Yes, as in Karate.

What are katas in codewars?

In the spirit of martial arts, more specifically Karate, these code problems are called katas. The katas are divided, ascendingly, according to their difficulty. There are katas from 8th kyu to 1st kyu, with 1st kyu being the most difficult type of kata of all.

How do I design a REST API? How many levels should I nest my related resources? Relative or full URLs? This post is a compilation of some recommendations about some good REST API design practices that I have found in books and articles on the internet. I leave the sources at the end of the article in case you are interested in going deeper or see where this information comes from.

This publication is a minimal guide of practical tips on REST API design, what is a characteristic of the REST API? I don’t go too deep into the theory. On top of that, I may oversimplify many concepts in order to keep the text as short and simple as possible.

In the next post I will talk about some more subjective questions such as: how to return JSON correctly, how to nest an API, what are the ways to version a REST API, and what are some of the ways to version a REST API.