That day I learn Ruby
Don't get me wrong, I don't have the pretention to know Ruby or how to code in Ruby. It's just a way of saying that "if you want to do something, just do it!" I am sharing "simple" knowledge stuff for everyone and for sharing knowledge.
So Ruby: Created/designed in 1995 by Yukihiro Matsumoto (aka “Matz”)
Let me tell you a story about Ruby
One day, we had one of our Hackhathon at my current company & we were short on dev support for an idea I had; so I said to myself "why not try to build something that I could connect to our exisiting tool".
The goald was to connect our website and search for some way to optimize our Interlinking strategy. I will not go into to much details about the how and what of this tool (internal knowledge guys 😇); But I will explain my journey into Ruby.
Interlinking: the process of linking 2 pages on the same property/website. The end goal is to help crawler discover these pages and enhance the visibility (and the Organic ranks) of a specific page.
First step: What is Ruby?
I heard of Ruby in the past, but that was really blurry for me. So the first thing I did is using a search engine and find official website and good articles about this language. Following that, the second step was to search on our internal documentation for coursese, tutorials, ...
I found great learning tool thanks to CodecAdemy (in addition to path available for employee at Shopify). Let me share with you some of the courses I took and the thing I learned!
Learning Ruby: the courses 101, 102 and 103
The goal of these introduction courses were to understand the structure of the language and how variables are working
Learning Ruby 101
For this article, I will not display how to install Ruby on your machine: also that could depend on the OS you have, its version and what you are currently using!
Commenting in Ruby
Commenting content is really useful, especially when you are learning, I found it really easy to remember specific lines of code and what they do. This was my first learning really and so to comment in Ruby, you could use either
=end depending on if you want to comment one or several lines of code.
1# Comment in Ruby with `#` foir single line
I'll use this first one to remember some stuff along the way
1=begin2Comment in ruby with3`=begin`4and5`=end`6for multiple line and it is case sensitive7=end
I'll use this one to comment some parts of my code to run and test it. For example if I know some part of the code is working and the other on is failling: better understanding where it is failing.
Arithmetics in Ruby
6 arithmetics operators
- Addition (
- Subtraction (
- Multiplication (
- Division (
- Exponentiation (
- Modulo (
So what does that mean?
- my_num = 100
- my_num1 = my_num * 4
- my_num2 = my_num1/16
- my_num1 = 400
- my_num2 = 25 OR my_num2 = my_num/4
More maths below just for you, with examples
1sum = 13 + 3792puts sum3> 392
1product = 923 * 152puts product3> 13845
1quotient = 13209 / 172puts quotient3> 777
Data type in Ruby
There are three data types in Ruby that we're interested in right now: Numeric (any number), Boolean (true/false), and String ("random text").
Where you declare a variable
var_var and give it a value
1puts my_num2puts my_bolean3puts my_string
Run and display Ruby informations
To launch a ruby script you created, you will have to run
ruby name_of_file.rb in you CLI.
You can also use
puts is the way to display/print something from your script & it will output 2 lines.
put strings on its full length
print('value')equilavent in Python
Learning Ruby 102
Some might think it is too "simple", but remember that this is the second course of the Ruby 102, I took ✌️
Length in ruby
For the length in Ruby, you will use
1variable = "Testing the length of myvariable"2size = variable.length3puts size
Note that you could also directly add
"Testing the length of myvariable".length in your script
1variable = "Testing the reverse of my variable"2size = variable.reverse3puts size
Note that you could also directly add
"Testing the reverse of my variable".reverse
.reserve => Reversing input can be useful if you want to sort a list of values from highest to lowest instead of lowest to highest.
Upper and lower cases
Yes, still simple as it could be, but remember this is an introduction to Ruby. So to print (
puts if you follow) a string in uppercase you will use
.upcase and to fo the same thing downcase it will be ( ... wait for it ... )
1name = "Arthur"2name_uper = name.upcase3name_lower = name.downcase4puts name_uper5puts name_lower67> ARTHUR8> arthur
Varables: string and integer
1my_name = "Arthur" #String2my_age = 32 #Integer
Learning Ruby 103
Let's something more tangible begin for this Ruby 103: strings and strings Methods
Two way of doing it:
- with several variable
- adding one method after the other one
=> It will lead to the same output
Strings and String Methods: One variable
1name1 = "Arthur".downcase.reverse.upcase2puts name1
Like an example we already saw before
1names = "Arthur"2names_lowercase = names.downcase3names_down_reverse = names_lowercase.reverse4names_down_reverse_up = names_down_reverse.upcase56puts names_down_reverse_up
Learning Ruby 201
Let's go directly to the next step of this introduction (for me it was at least): launching the shell command.
In python you would use
python3, in Ruby it's
irb & it stands for
Interactive Ruby Shell
So in the end: what about Ruby?
In the end I was able to learn and understand Ruby ... but not build a tool in 2-3 days (obviously). It was great, I am feeling more comfortable understanding and making changes to our website (yeah part of the Technical SEO priviledge is to modify Tech stuff 😅).
Want to hop on the train?
If you want to hop on the Ruby train: let's hit the Rails! You can follow the same introduction course I took on CodecAdemy, you could go to Udemy or go to Coursera or even RubyMonk (I will not list everywebsite available). There is a ton of ressources online to learn Ruby, including the one from the Ruby Foundation!
I will finish this article by sharing with you my (not mine directly) cheatsheet from CodecAemy: https://www.codecademy.com/learn/learn-ruby/modules/learn-ruby-introduction-to-ruby-u/cheatsheet