cl-merge

cl-merge is an autoloaded compiled Lisp function in `cl-seq.el'.

(cl-merge TYPE SEQ1 SEQ2 PREDICATE [KEYWORD VALUE]...)

Destructively merge the two sequences to produce a new sequence.
TYPE is the sequence type to return, SEQ1 and SEQ2 are the two argument
sequences, and PREDICATE is a `less-than' predicate on the elements.

Keywords supported: :key