Function clamp

Given range (where each part may be empty), clamp a given possibly empty number to the given range.

Example

clamp(0)(10)(5) // Some(5)
clamp(0)(10)(-4) // Some(0)
clamp(0)(10)(12) // Some(10)

clamp(0)(undefined)(5) // Some(5)
clamp(0)(null)(-1) // Some(0)

clamp(NaN)(10)(5) // Some(5)
clamp(undefined)(10)(12) // Some(10)

clamp(undefined)(undefined)(5) // Some(5)

clamp(0)(1)(null) // None
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