I need to transform a decimal fraction received as a string into its
reciprocal, also stored as a string. I have come up with this but I
would like to know if there exists a better way to accomplish this
requirement.
trate = xchg.xpath('cb:value').text
scale = 10 ** (trate.length() -1 - (trate.index('.').to_i))
value = trate.gsub(/\.|,| /,'').to_i
trate = (1000000 * scale / value).to_s
trate = trate.rjust(7,'0')
trate = trate.insert(-7,'.')
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