Created
December 7, 2009 00:22
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| def significant_figures(num) | |
| sn = num.to_s.sub(/e[-+]*\d+$/i, '') # remove the scientific notation | |
| sn = sn.sub(/0*$/, '') unless sn.include?('.') # remove any trailing zeros | |
| sn.sub('.', '').sub(/^[-+]?0*/, '').length # remove the sign, leading zeros | |
| end |
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