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39.3.3 Selectors

first pair	Scheme Procedure
second pair	Scheme Procedure
third pair	Scheme Procedure
fourth pair	Scheme Procedure
fifth pair	Scheme Procedure
sixth pair	Scheme Procedure
seventh pair	Scheme Procedure
eighth pair	Scheme Procedure
ninth pair	Scheme Procedure
tenth pair	Scheme Procedure

These are synonyms for car, cadr, caddr, ....

car+cdr pair

Scheme Procedure

Return two values, the CAR and the CDR of pair.

take lst i	Scheme Procedure
take! lst i	Scheme Procedure

Return a list containing the first i elements of lst. take! may modify the structure of the argument list lst in order to produce the result.

drop lst i

Scheme Procedure

Return a list containing all but the first i elements of lst.

take-right lst i

Scheme Procedure

Return the a list containing the i last elements of lst.

drop-right lst i	Scheme Procedure
drop-right! lst i	Scheme Procedure

Return the a list containing all but the i last elements of lst. drop-right! may modify the structure of the argument list lst in order to produce the result.

split-at lst i	Scheme Procedure
split-at! lst i	Scheme Procedure

Return two values, a list containing the first i elements of the list lst and a list containing the remaining elements. split-at! may modify the structure of the argument list lst in order to produce the result.

last lst

Scheme Procedure

Return the last element of the non-empty, finite list lst.