Bytes to human-readable format.

human_readable.rb

class Numeric

  SIZE_TABLE = {
    # power    # units
    0          => "",
    1          => "KB",
    2          => "MB",
    3          => "GB",
    4          => "TB",
    5          => "PB",
    6          => "EB",
    7          => "ZB",
    8          => "YB",
  }

  def human_size
    power = self.log(1024).floor
    base  = 1024 ** power
    units = SIZE_TABLE[power]
    "#{(self / base).round}#{units}"
  end

end