Extreme Startup - PJ QuizSolvers - Ruby

extreme_startup.rb

# encoding: utf-8

require 'rubygems'
require 'sinatra'

class ExtremeStartup
  
  lastName = ""
  
  def fib(n)
    curr = 0
    succ = 1

    n.times do |i|
      curr, succ = succ, curr + succ
    end

    return curr
  end
  
  def is_prime?(n)
    return true if n <= 2
    return false if n & 1 == 0
    # runs the block for each number from 2 to sqrt(n)
    # only returns true if the block *never* returns true
    (2..(Math.sqrt(n).to_i)).none? { |i| n%i == 0 }
  end

  def answer(q)
    if q =~ /what is (\d+) plus (\d+) plus (\d+)/
      return ($1.to_i + $2.to_i + $3.to_i).to_s
    elsif q =~ /what is the twitter id of the organizer of this dojo/
      return "olemartin"
    elsif q =~ /what currency did Spain use before the Euro/
      return "peseta"
    elsif q =~ /what is (\d+) plus (\d+) multiplied by (\d+)/
      return ($1.to_i + $2.to_i * $3.to_i).to_s
    elsif q =~ /what is (\d+) multiplied by (\d+) plus (\d+)/
      return ($1.to_i * $2.to_i + $3.to_i).to_s
    elsif q =~ /what is (\d+) plus (\d+)/
      return ($1.to_i + $2.to_i).to_s
    elsif q =~ /which city is the Eiffel tower in/
      return "Paris"
    elsif q =~ /who is the Prime Minister of Great Britain/
      return "David Cameron"
    elsif q =~ /who played James Bond in the film Dr No/
      return "Sean Connery"
    elsif q =~ /what colour is a banana/
      return "yellow"
    elsif q =~ /what is (\d+) to the power of (\d+)/
      return ($1.to_i ** $2.to_i).to_s
    elsif q =~ /what is (\d+) minus (\d+)/
        return ($1.to_i - $2.to_i).to_s
    elsif q =~ /what's santa clause's real name/
      return "Julenissen"
    elsif q =~ /what is your name/
      return "PJ QuizSolvers"
    elsif q =~ /my name is (\S+)\. what is my name/
      lastName = $1
      return lastName
    elsif q =~ /what is my name/
      return lastName
    elsif q =~ /which of the following numbers is the largest: (.*)/
      return $1.split(", ").collect{ |i| i.to_i }.max
    elsif q =~ /what is (\d+) multiplied by (\d+)/
      return ($1.to_i * $2.to_i).to_s
    elsif q =~ /which of the following numbers is both a square and a cube: (.*)/
      int_array = $1.split(", ").collect{ |i| i.to_i }
      int_array.each do |i|
        squareRoot = Math.sqrt(i).to_i
        puts squareRoot
        cubeRoot = i**(1.0/3.0)
        puts cubeRoot.to_i
        
        if (squareRoot * squareRoot == i and cubeRoot.to_i**3 == i)
          return i
        end
      end 
      return ""
    elsif q =~ /what is the (\d+)th number in the Fibonacci sequence/
      return fib($1.to_i).to_s
    elsif q =~ /which of the following numbers are primes: (.*)/
      int_array = $1.split(", ").collect{ |i| i.to_i }
      output = ""
      int_array.each do |i|
        output = output + i.to_s + ", " if is_prime?(i)
      end
      return output[0..output.length-3]
    else
      return ""
    end
  end
end

server = ExtremeStartup.new

configure do
  set :port, 9392
end

get '/' do
  puts "A request has arrived: " + params[:q]
  answer_string = server.answer(params[:q]).to_s
  puts "Answered: " + answer_string
  answer_string
end