Ruby Foundations > Blocks > EC: comparison of Fixnum with nil failed (ArgumentError)

class SimpleBenchmarker

    def initialize
        puts "How many iterations of the benchmarker would you like to run? "
        @run_count = gets.to_i
        if @run_count <= 10
            puts "Initiating..."
        else
            puts "Please enter an integer value less than 10."
            initialize
        end
    end

    def self.go(how_many=1, &block)
        results = Array.new
        i = 0
        while i < @run_count
            puts "---------- Benchmarking Started ----------"
            start_time = Time.now
            puts "Start Time: \t#{start_time}\n\n"
            how_many.times do |a|
                print "."
                block.call
            end
            print "\n\n"
            end_time = Time.now
            puts "End Time:\t#{end_time}\n"
            puts "---------- Benchmarking Finished ----------"
            result = end_time - start_time
            results.push result
            puts "Result:\t\t#{result} seconds"
            i += 1
        end
        results.sort!{|a,b| a <=> b}
        puts "#{results}"
    end
end

Benchmark = SimpleBenchmarker.new

SimpleBenchmarker.go 3 do
    time = rand(0.1..1.0)
    sleep time
end