Given an input string with the scientific pitch notation for standard tuning ( http://en.wikipedia.org/wiki/Guitar_tunings#Standard_tuning ) of a guitar string (e.g. 'E4'), return the frequency (to nearest whole number) in hertz (in this case, 330).
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Boris Huart
on 9 Jan 2013
Many solutions depend on the tested inputs... Is there a way to prevent it ?
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