Sorting feature comes with various APIs. See sorting entry of SLIB manual for discussion.
[procedure] sort sequence predicate
Bigloo: sequence may be a list or a vector. Expects predicate to behave like <. The document doesn't mention about stability.
[procedure] sort sequence [predicate]
Gauche: sequence may be a list or a vector. Expects predicate to behave like <. Predicate can be omitted. Unstable.
[procedure] sort predicate sequence
ChezScheme: sequence must be a list. Expects predicate to behaves like <.
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