Programming

The other day I was asked: How do I get usernames and passwords into my Python scripts? For example to use with Netmiko, Scrapli or Nornir. The simple answer to this is the library python-dotenv. Whats python-dotenv? python-dotenv is a library that loads your environment variables from a .env file.

Python is a powerful programming language that can be used for a wide range of tasks. One of those tasks is organizing files. With just a few lines of code,

This all started with a simple question about the R programming language: _is R lexically or dynamically scoped?_ To answer that question, we need to understand what _scope_ is, along with _lexical scope_ and _dynamic scope_....

When many ideas are better than a few

Summary: Return values from different expressions in a with block can only be distinguished by the shape of the data returned. This creates …

This recording is part of the Packet Coders member Tech Sessions. Within this tech session we cover: Why Go? Reasons why people choose Go Go for network engineers Go vs (Python | Ruby | C | Rust) Intro to Go Go proverbs Go tool Types system Interfaces Concurrency Network automation overview SSH HTTP

Previously, we created the initial Phoenix app and created a Teacher struct and table. We went over how to perform the basic CRUD operations as well as how to do some basic tests to verify the functionality. In part 2, we’re going to be adding more structs and defining relationships between them. We’ll also go over how to fetch records with their associations. If you haven’t been following along, you can checkout the code from GitHub and fetch the branch:

I want to add tags to products. And as usual there are a situation where a product can have many tags and a tag can belong to many products. However, in my opnion, the best option is to use a 'has_many :through' relationship. So for this, I need a table called tags and a join table called taggings. In this tutorial, I will go through how would do this.

Something I do in EVERY project is to setup some sort of relation between resources. And even though Phoenix comes with generators for migrations and CRUD opeartions, you still need to modify the code to suite for the relations you want. In this short tutorial, I will go through my usual steps regarding setting up a basic has_many / belongs_to - relation.

One thing I found confusing about Postgrex , the excellent PostgreSQL adapter for Elixir , was how to use PostgresSQL-specific data types (...

Components are a mechanism to compartmentalize state, markup, and events in LiveView. We can move a part of the LiveView's logic (and related template) into separate components. We start by moving the product card, the part inside the for comprehension, into a LiveComponent.

We see how to create thumbnails of Images and PDFs in Elixir and Phoenix, using ImageMagick and Mogrify.

Learn how to make use of functional components to create complex Phoenix LiveView UIs.

A step-by-step tutorial we see in depth how to build a Phoenix app from scratch, letting users upload their files using a multipart form. We learn how to easily run PostgreSQL with Docker, to receive uploads using Plug, and how to use Ecto to store upload details into the database.

Validate and define text-based and dynamic configuration

There are big changes in store for the Web IDE in the coming milestones.

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Convert hex strings to PGP word lists and vice-versa in elixir https://en.wikipedia.org/wiki/PGP_word_list Re-implementation of

Demystify encryption by taking a medium dive and building your very own encryption engine in Elixir. In this post, we'll build a light-weight Elixir library that leverages Erlang's :crypto to encrypt/decrypt sensitive data, and learn a little more about encryption along the way. Overview Our library will be able

Believe it or not, I spent 3 years of my career without knowing what testability really means, in fact, I never really heard that term until lately. I have been working on small-scale applications, writing tests for every feature I had implemented, b...

RStudio 1.4 was released in January 2021 and switched to calendar-based versioning as of 2021.09. Starting with 1.4, the IDE includes a visual markdown editor that works on any markdown-based document, such as .md or .Rmd files. Visual editing mode pro...

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