Question

I have an audio tag that looks like this: “00:14:164“, i.e. “MM:SS:splits“.

I’d like to have the format be numeric and only in the seconds unit.

So for example:

“00:14:164” would be 14.164

and

“01:59:582” would be 119.582

What is the best way of doing this?

Answer 1

def tag_to_f(tag)
  a = tag.split(':').map(&:to_i)
  "#{a[0] * 60 + a[1]}.#{a[2]}".to_f
end

tag_to_f "01:59:582"

Or monkey patch String:

class String
  def to_f_with_audio_tag
    if a = match(/^(\d+):(\d+):(\d+)$/).to_a[1..3].map(&:to_i) rescue nil
      "#{a[0] * 60 + a[1]}.#{a[2]}".to_f_without_audio_tag
    else
      to_f_without_audio_tag
    end
  end

  alias_method_chain :to_f, :audio_tag
end

"01:59:582".to_f