A dice betting game using Opal Ruby to Javascript source-to-source compiler

dice_betting_game.rb

# Dice Betting Game, https://opalrb.com/try/
bank = 100;
while bank > 0 do
  bet = `prompt("Place your bet")`.to_i
  dice1 = (rand * 6).ceil
  dice2 = (rand * 6).ceil
  outcome = dice1 == dice2
  bank += bet if outcome
  bank -= bet unless outcome
  puts "Numbers are: #{dice1} #{dice2}"
  puts outcome_txt = outcome ? "You Win" : "You Lose"
  outcome_txt += ", bank is now #{bank}"

  puts "Bank is now #{bank}"
  `alert(outcome_txt)`
end

Created a new one using native:
https://gist.github.com/svoboda-jan/cc4d675bac8a966038c8aeb0a495b3ad

The motivation behind these scripts is to create an easy way to start learning ruby without having to install it.

So in the betting game a task may be:

• disallow betting to negative numbers
• warn the user and ask if he wants co continue the game with certain bank treshold

In the calendar it might be:

• to add support for leap years
• to highlight holidays

Another script I've created is to display Czech name days, using Base64 encoded data at the end of the file:
https://gist.github.com/svoboda-jan/25144fb6b734893dc4742ac52b54b869

Here the task could be to combine these scripts in some way, like displaying the name day in the calendar, think that wold be a good task to teach refactoring, because both scripts work with date.

Is there a standalone example? E. g. can I just put the ruby code into a .html file too, or do
I need to use "opal --compile"?

Would be nice to add it to the official examples, if it works. Right now I am not sure how to
get it to work (I am an opal-noob at this point in time).