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Get the BigDecimal Exhibitor

I want to get a BigDecimal record.

`1M` (`1E0M`)      -> `0`
`10M` (`1E1M`)     -> `1`
`11M` (`1.1E1M`)   -> `1`
`1E2M`             -> `2`
`1.0E2M`           -> `2`
`100M` (`1.00E2M`) -> `2`

scale, at least on my own, is not what I need. I really would not have to use .toPlainStringand hack something around this.

I'm a little surprised that the metric I want is not part of the BigDecimal internal view.

I am using BigDecimal from Clojure, but any logic that works for Java is also welcome.

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1 answer
(defn exp<-bigdec
  "Returns the exponent, b, from a BigDecimal in the form a * 10 ^ b."
  [x]
  (- (.precision x) (.scale x) 1))
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