`fxmapping-pop-min``fxmap`procedure`fxmapping-pop-max``fxmap`procedureReturns three values,

*k*,*v*, and*fxmap′*, where (*k*,*v*) is the association of*fxmap*with the least/greatest key and*fxmap′*is a fxmapping containing all of the associations of*fxmap*except for (*k*,*v*). It is an error if*fxmap*is empty.Example:

(let-values (((k v fxmap) (fxmapping-pop-min (fxmapping 0 'a 1 'b 2 'c)))) (values k v (fxmapping->alist fxmap))) ⇒ (0 a ((1 . b) (2 . c)))