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import strutils
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type FloatRange = tuple[s,e: float]
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proc mapRange(a,b: FloatRange, s): float =
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b.s + (s - a.s) * (b.e - b.s) / (a.e - a.s)
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for i in 0..10:
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let m = mapRange((0.0,10.0), (-1.0, 0.0), float(i))
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echo i, " maps to ", formatFloat(m, precision = 0)
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