[#217] Add `nonZero` to Indigo expression
Description
Problem: We have nonZero
in Lorentz that returns Nothing if the value is 0
, and Just
the value otherwise. There is however no equivalent to it in Indigo.
Solution: Add nonZero
expression equivalent to its Lorentz homonym.
Related issue(s)
Resolves #217 (closed)
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Edited by Moremi Vannak