An intro to Arrays usage in Ruby

arrayUsage.rb

require 'benchmark'

NUM_PERSONS = 100_000#10_000_000

class Person < Struct.new(:sex, :age, :height, :index, :money)
end

class Array
  def search(options={}) 
    options.delete_if {|k,v| not Person.members.include?(k.to_s)}
    find_all { |person|
      options.all? {|k,v| v === person.send(k) }
    }
  end
end

def rand_in_range(from,to)
  rand(to+1-from) + from
end

def ask_user_input(msg, data_kind=:numeric)
  puts msg
  input = gets.strip.downcase
  return nil if input == 's'

  if data_kind == :numeric
    if input =~ /^\d+$/
      input.to_i
    elsif input =~ /^\[\d+\.\.\d+\]$/
      input.split('..').map(&:to_i)
    else
      raise ArgumentError, 'must be in the format [x..y] or just a nimeric value' 
    end
  else
    #suppose it is a boolean, i.e. true or false
    raise ArgumentError, 'must be "true" or "false"' unless ['true', 'false'].include?(input)
    input == 'true'
  end
end

def main_loop(persons_array)
  while true do
    puts 'Please press `q` to quit, or press any other key to enter personal data.'
    input = gets.strip
    if input.downcase == "q"
      break
    else
      begin
        sex_arg = ask_user_input('sex: true or false or hit s to skip', :boolean)
        age_arg = ask_user_input('age in the format: [x,y] or just a single value or hit s to skip', :numeric)
        height_arg = ask_user_input('height in the format: [x,y] or just a single value or hit s to skip', :numeric)
        index_arg = ask_user_input('index in the format: [x,y] or just a single value or hit s to skip', :numeric)
        money_arg = ask_user_input('money in the format: [x,y] or just a single value or hit s to skip', :numeric)
    
        options = {}
        options[:sex] = sex_arg unless sex_arg.nil?
        Hash[[:age, :height, :index, :money].zip([age_arg, height_arg, index_arg, money_arg])].each do |key, value|
          if not value.nil?
            options[key] = value.is_a?(Array) ? Range.new(*value) : value
          end    
        end  

        Benchmark.bm do |b|
          b.report("search ") do
	        result = persons_array.search(options)
	        puts "found : #{result.size} persons"
          end
        end
        puts 'okay'
      rescue ArgumentError => e
        next
      end
    end
  end
end

########################################################################
srand
puts "generating #{NUM_PERSONS} persons"
persons = (1..NUM_PERSONS).map{ |person|
  sex = rand_in_range(0,1) == 1
  age = rand_in_range(10, 75)
  height = rand_in_range(160, 210)
  index = rand_in_range(1,10)
  money = rand_in_range(100, 1000)
   
  person = Person.new(sex, age, height, index, money)
}

puts "persons #{persons.size} generated" 
main_loop(persons)
puts 'bye!'