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  ANSI Common Lisp   17 Sequences

17.1 Sequence Concepts

A sequence is an ordered collection of elements, implemented as either a vector or a list.

Sequences can be created by the function make-sequence, as well as other functions that create objects of types that are subtypes of sequence (e.g., list, make-list, mapcar, and vector).

A sequence function is a function defined by this specification or added as an extension by the implementation that operates on one or more sequences. Whenever a sequence function must construct and return a new vector, it always returns a simple vector. Similarly, any strings constructed will be simple strings.

Standardized Sequence Functions
concatenate length remove
copy-seq map remove-duplicates
count map-into remove-if
count-if merge remove-if-not
count-if-not mismatch replace
delete notany reverse
delete-duplicates notevery search
delete-if nreverse some
delete-if-not nsubstitute sort
elt nsubstitute-if stable-sort
every nsubstitute-if-not subseq
fill position substitute
find position-if substitute-if
find-if position-if-not substitute-if-not
find-if-not reduce

17.1.1  General Restrictions on Parameters that must be Sequences

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