The least element of a non-empty structure.
This function is non-total and will raise a runtime exception if the
structure happens to be empty. A structure that supports random access
and maintains its elements in order should provide a specialised
implementation to return the minimum in faster than linear time.
Examples
Basic usage:
>>> minimum [1..10]
1
>>> minimum []
*** Exception: Prelude.minimum: empty list
>>> minimum Nothing
*** Exception: minimum: empty structure
WARNING: This function is partial for possibly-empty structures like
lists.