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class Float
alias precisionless_round round
private :precisionless_round
# Rounds the float with the specified precision.
#
# x = 1.337
# x.round # => 1
# x.round(1) # => 1.3
# x.round(2) # => 1.34
def round(precision = nil)
if precision
magnitude = 10.0 ** precision
(self * magnitude).round / magnitude
else
precisionless_round
end
end
end if RUBY_VERSION < '1.9'
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