Example 1.
Let's see if 1 is even by executing the following code:

Quote:puts 1.even?

Quote:puts 2.even?

Quote:puts 1.odd?

Quote:puts 2.odd?

Patch Notes:

• 0.4:
  
  • Revamped combat game. Feedback appreciated!
    
  • Time Boost added to research options
    
  • Explored planets displayed in UI
    
  • Colony ships no longer grant science
    
  • Console reports colony ships granting power
    
  • Power no longer used by disabled factories
    
  • Mini-icons updated to match buttons
    
• 0.3.1:
  
  • Fixed issue where higher multiplier colony ship purchases weren't costing the correct amount
    
  • Disabled cheat keys in published builds
    
  • Fixed incorrect draw order of the configure/console
    
  • Improved legibility of "hostiles detected"
    
  • Sound: Off setting respected on refresh
    
  • Show a warning overlay when out of probed planets to colonize
    
  • Display factory counts
    
  • Added toggle factory button for factory types (replaces r-click)
    
  • Added a bunch of new sound effects
    
  
  
• 0.3.0:
  
  • New interface
    
  • Hostiles/Fighters
    
  
  
  
• 0.2.0:
  
  • Save games (and reset).
    
  • Artifacts.
    
  
  
  
  
• 0.1.0:
  
  • Added power. Mines and Factories require power.
    
  • Re-tuned many values.
    
  • Right click a production button to disable production of that item and all factories^n of that item.
    
  
  
  
  
  
• 0.0.2:
  
  • Fixed bug when building factory^n.
    
  • Buttons have pressed and mouseover states, click sounds.
    
  • Costs now have min 2 sig figs.
    
  • Factories now tick every 1/10th of a second (like mines).
    
  
  
  
  
  
  
• 0.0.1:
  
  • Fixed bug where you could be unable to build probes.
    
  • Most numbers displayed in a fixed width font with delimeter.
    
  • Suffixes for costs now go to T (trillion), Q and beyond.
    
  • Many actions and results now displayed when they occur. Example "Probe arrived: +1{science icon}"
    
  
  
  
  
  
  
  
• 0.0.0:
  
  • Direct copy of the LD31 version to the new site
    

After reading the official Ruby 3.0.0 documentation I have discovered another cool thing.
Let's assume we want to get the result of 11 / 3 and declare some variables as follows:

Quote:Num1 = 11
Num2 = 3
Quotient = Num1 / Num2
puts "Quotient: " + Quotient.to_s

Quote:Option 1: 
Num1 = 11
Num2 = 3
Remainder = Num1 % Num2
puts "Remainder: " + Remainder.to_s

Option 2:
Num1 = 11
Num2 = 3
Remainder = Num1.remainder(Num2)
puts "Remainder: " + Remainder.to_s

Quote:Num1 = 11
Num2 = 3
Quotient = Num1 / Num2
Remainder = Num1 % Num2
Quotient_Remainder = "#{Quotient}, #{Remainder}"
puts "Quotient and remainder: " + Quotient_Remainder.to_s

Quote:Num1 = 11
Num2 = 3
Quotient_Remainder = Num1.divmod(Num2)
puts "Quotient and remainder: " + Quotient_Remainder.to_s

After reading the official Ruby 3.0.0 documentation I have discovered that there are 2 ways to get the square root of a number.
When working with small numbers, both options return the same results,
but when the numbers get bigger the results of Option 2 may be inaccurate as follows:

Option 1:

Quote:Num1 = Integer.sqrt(10**46)
puts Num1

Quote:Num1 = Math.sqrt(10**46).floor
puts Num1

I have discovered a little inconvenience when trying to execute Ruby from the Linux terminal with a friend.
The Linux version of Ruby doesn't offer the interactive ruby shell,
so if you want to execute Ruby codes from the built in Linux terminal you have to do the following:

1. Open the terminal
2. Write some Ruby code in it
3. Save the file i.e. as example.rb
4. Open the file from the terminal

Print will print whatever you have in one line on the screen, even if there are multiple lines in your code.
For example:

Quote:print 1 + 2
print 2 + 3

Quote:puts 1 + 2
puts 2 + 3

To get the currently installed patch level you just need the following code:

Quote:puts "Ruby patch level: "+RUBY_PATCHLEVEL

To get the currently installed Ruby version you'll just need the following code:

Quote:puts "Ruby version: " +RUBY_VERSION

Actually there are several ways to get started with Ruby 3.

1. Testing Ruby online

You can type some Ruby code and run it online here.
Version 2.5.1. isn't the latest Ruby version,
but since it's online you don't need to install anything
and it runs on all kinds of devices.

2. Testing Ruby with an IDE

To test Ruby with an IDE you should download the latest Ruby version here.
Please follow the installation instructions to install Ruby either on Windows, Mac or Linux.
Once Ruby is installed correctly you can download a small, lightweight and free IDE here.
Now click on "File" > "New" > file.rb to create a new Ruby file.
You can delete the automatically generated Ruby code and add your own.
Then save it i.e. as untitled.rb and click on the "execute" button to run it.

This way you should have the latest Ruby version (currently 3.0.0),
you can use syntax highlighting, code completion or other cool things,
but you'll have to download and install it on your device.

3. Testing Ruby in the interactive ruby shell

If you have decided for step 2 you can also run Ruby codes in the interactive ruby shell that was installed on your device.
On Windows click on "Click here to search" and type "Interactive Ruby" there.
For Mac or Linux please read the Ruby documentation on how to open it there instead.
Now you can directly write some code and execute it without saving it first.
This way you will also have the latest Ruby version (currently 3.0.0).
It also requires an installation on your device.
There is no syntax highlighting, code completion etc.

Comments will be ignored by the browser.
You can use comments i.e. to make it easier to read your code for others when working in a team,
or to make it easier to understand what each part of the code does when trying to teach someone programming,
or for commenting out some parts of the code that didn't work as expected to fix them later.

Multi line comments are done as follows:

   

If you have done it correctly your HTML document should look like this now: