Alexandre Calaça
Alexandre Calaça's Blog

Alexandre Calaça's Blog

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Alexandre Calaça

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Ruby on Rails developer, English speaker and Technical writer. Topics: Ruby, Rails, Design patterns and language acquisition.

GitHub: https://github.com/alexcalaca Email: soon

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Error: RVM is not a function, selecting rubies with 'rvm use ...' will not work on Kubuntu

Mar 24, 20221 min read

Hey guys In case you're using Kubuntu 20.04.4 and you you came across with the following error message: RVM is not a function, selecting rubies with 'rvm use ...' will not work on Kubuntu The complete error message is this Part of our development a...

Error: RVM is not a function, selecting rubies with 'rvm use ...' will not work on Kubuntu

In Ruby, why does my division return an integer instead of a decimal value?

Feb 5, 20222 min read

Greetings Hey, It's Alexandre Calaça here. Hope you're fine. Introduction In this article, let's check why some Ruby's divisions return an integer instead of a decimal value and figure out a way to solve this issue. Why does it happen? First things ...

In Ruby, why does my division return an integer instead of a decimal value?

How to convert a string to lowercase in Ruby?

Feb 1, 20222 min read

Greetings Hey, It's Alexandre Calaça here. Hope you're good. Introduction Today, let's learn and practice how to convert a string to lowercase in Ruby. The downcase method In Ruby, the downcase method is used to convert a string to lowercase. It re...

How to convert a string to lowercase in Ruby?

What are predicate methods? How to identify them in Ruby?

Jan 20, 20222 min read

Goal The goal of this article is to talk about how predicate methods work. Examples are going to be provided using the programming language Ruby. Introduction In order to grasp the idea, let's see the definition of the word predicate in some fields o...

What are predicate methods? How to identify them in Ruby?

How to check the version of Ubuntu or any other Linux distribution using the command line?

Jan 14, 20222 min read

Hey guys, what's up? Introduction The goal of this article is to check the version of Ubuntu or any other Linux distribution using the command line. The "magic" command The "magic" command is lsb_release. Introduction The most reliable command is lsb...

How to check the version of Ubuntu or any other Linux distribution using the command line?

5 effective ways to add items to arrays in Ruby

Jan 5, 20225 min read

Hey guys, how's it going? Introduction Today, let's learn about 5 effective ways to add items to arrays in Ruby. As always, you don't need to memorize them all, however I think it's always a good idea to know that you have a wide variety of options. ...

5 effective ways to add items to arrays in Ruby