delete

• Removes items from a sequence destructively, i.e. splices the sequence

> (setq a (list 1 2 3 4 3 2 1))

(1 2 3 4 3 2 1)

> (setq a (delete 2 a))

(1 3 4 3 1)

> a

(1 3 4 3 1)

> (delete 1 a)

(3 4 3)

> a

(1 3 4 3)

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