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rubybytefilesize

Convert human readable file size to bytes in ruby

I went through this link. My requirement is the exact reverse of this. Example a string 10KB needs to be converted to 10240 (its equivalent byte size). Do we have any gem for this? or inbuilt method in ruby? I did my research, I wasn't able to spot it

Solution

  • There's filesize (rubygems)

    It's quite trivial to write your own:

    module ToBytes
  def to_bytes
    md = match(/^(?<num>\d+)\s?(?<unit>\w+)?$/)
    md[:num].to_i * 
      case md[:unit]
      when 'KB'
        1024
      when 'MB'
        1024**2
      when 'GB'
        1024**3
      when 'TB'
        1024**4
      when 'PB'
        1024**5
      when 'EB'
        1024**6
      when 'ZB'
        1024**7
      when 'YB'
        1024**8
      else
        1
      end
  end
end

size_string = "10KB"
size_string.extend(ToBytes).to_bytes
=> 10240

String.include(ToBytes)
"1024 KB".to_bytes
=> 1048576

    If you need KiB, MiB etc then you just add multipliers.