CODEWITHSUNDEEP
ruby-on-railsrubyruby-on-rails-4percentage
Mini John
Mini John

Reputation: 7941

Percentage Calculation - Ruby on Rails

Background: An Alliance has a lot of Players, which have a lot of Towns. Every Town belongs to an Ocean.

My Problem:

I'm trying to calculate the percentage of Towns in a certain Ocean. E.g.:

<% @alliance.players.each do |p| %>
  <% p.towns.each do |t| %>
    <%= t.ocean %> 
  <% end %>
<% end %>

This gives me all the Town's Ocean's of a given alliance. The output will look like this:

54 54 54 54 54 35 54 54 54 54 54 54 54 54 45 45 45 45 45 45 54 54 54 44 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 44 54 44 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54 54

So we have the Majority: 54 and Few: 44.

How can i calculate the results so i get the Percentage of Towns in a specific Ocean so i get an output of e.g.: Ocean 54: 83%, Ocean 44: 17%.

Upvotes: 0

Views: 2520

Answers (1)

BroiSatse
BroiSatse

Reputation: 44685

How about:

percentages = p.towns.group_by(&:ocean).map {|ocean, towns| [ocean, (towns.count/p.towns.count.to_f * 100).round(0)]}.to_h
perentages.each {|ocean, percentage| puts "Ocean #{ocean}: #{percentage}%"}

Upvotes: 3

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