Ruby takes the doubled amount of RAM it should -

i trying things out homeserver , wrote little ruby program fills ram given amount. have halve amount of bytes want put ram. missing here or bug?

here code:

class ram    def initialize     @b = ''   end    def fill_ram(size)     puts 'choose if want set size in bytes, megabytes or gigabytes.'     answer = ''     valid = ['bytes', 'megabytes', 'gigabytes']     until valid.include?(answer)       answer = gets.chomp.downcase       if answer == 'bytes'         size = size * 0.5       elsif answer == 'megabytes'         size = size * 1024 * 1024 * 0.5       elsif answer == 'gigabytes'         size = size * 1024 * 1024 * 1024 * 0.5       else         puts 'please choose between bytes, megabytes or gigabyte.'       end     end     size1 = size     if @b.bytesize != 0       size1 = size + @b.bytesize     end     until @b.bytesize == size1       @b << '0' * size     end     size = 0   end    def clear_ram     exit   end    def read_ram     puts 'at moment program fills ' + @b.bytesize.to_s + ' bytes of ram'   end  end 

just imagine "* 0.5" @ each line wouldn't there.

i did test in irb , created new ram object , filled 1000 megabytes of data. in case filled ram 2000 megabytes of data, did add times 0.5 each line, can't solution.

when run get:

choose if want set size in bytes, megabytes or gigabytes. bytes @ moment program fills 512 bytes of ram 

i think problem missing check encoding.

i ran test in us-ascii (one character = 1 byte).

if run in utf-16 have explanation problem.

can try following code check encoding:

p encoding.default_internal  p encoding.default_external 

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after reading comment:

the result of script depends on parameter of ram.fill_ram. how start script - , how call ram.fill_ram?

please provide full code.

i called example with

r = ram.new r.fill_ram(1024) r.read_ram