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module Comparable
##
# Returns <i>min</i> if <i>obj</i> <code><=></code> <i>min</i> is less
# than zero, <i>max</i> if <i>obj</i> <code><=></code> <i>max</i> is
# greater than zero and <i>obj</i> otherwise.
#
# 12.clamp(0, 100) #=> 12
# 523.clamp(0, 100) #=> 100
# -3.123.clamp(0, 100) #=> 0
#
# 'd'.clamp('a', 'f') #=> 'd'
# 'z'.clamp('a', 'f') #=> 'f'
#
def clamp(min, max)
if (min <=> max) > 0
raise ArgumentError, "min argument must be smaller than max argument"
end
c = self <=> min
if c == 0
return self
elsif c < 0
return min
end
c = self <=> max
if c > 0
return max
else
return self
end
end
end
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