Do you want to fully understand what a bash command with all its flag does? Give explainshell.com a try 🙂
Read more...Author: Igor Springer
Extending bash history limits
I use bash on a daily basis. From time to time I want to refer to a command that I executed in the past. Very often I start scrolling and terminal ends. As a result, I am not able to find the command 🤷 Thanks to When laziness is efficient: Make the most of your Read more…
Read more...The most effective way of iterating over CSV files in Ruby
A short recap after reading kinda oldish Processing large CSV files with Ruby. There are multiple ways of achieving the same result, but with different resources usages. If you want to iterate over CSV file in Ruby, CSV#foreach is your friend. CSV.foreach(‘data.csv’, headers: true).with_index do |row, i| puts “Row #{ i }: #{ row.join(‘,’) }” Read more…
Read more...Go Modules versus Docker & private dependencies
Go Modules has been the default since Go 1.13. One of microservices I am responsible for uses Golang 1.13 currently. The oldest Go version used by the application was 1.9 and at the time, dep was the most obvious choice for dependency management.
Read more...How Ruby 2.6 allowed me to do another open source contribution
Every minor Ruby release brings some new features to the language. Few interesting articles describing Ruby 2.6.0 changelog have already been published, so describing them is not the goal of this article. However, one of them allowed me to do another open source contribution, and in my opinion, that is something worth sharing. Maybe it will inspire you to do the same.
Read more...Why don’t we validate controller parameters?
Using strong parameters in Ruby on Rails applications to allow permitted values is usually not enough. Taking care of validating allowed values to make our applications is also important to make them more secure and less error-prone. To handle the validation properly we can write custom solution(s) or use handy gems like apipie-rails.
Not-so-private constants in Ruby
Using constants is idiomatic for Ruby. We use them to store something meaningful (a well-suited name is very important), connected with a class that holds it. Consequently, we make our code easier to reason about, avoid duplication and, very often, more performant.
Read more...Is `Array` the only option for storing elements in Ruby?
Array class is one of the most commonly used Ruby class in day-to-day development. Enumerable module adds a comprehensive set of methods which makes playing with arrays a pleasant activity. I have just written set deliberately.
Common mistakes that cause Ruby on Rails apps outages
Everybody makes mistakes. Some of them are caught early in a deployment pipeline: during writing code, testing it locally or code review process. Unfortunately, some hide cleverly and pop up on the production environment.
Read more...Ruby `allocate` method
TIL that Ruby, or to be more precise Class class, offers allocate public instance method.