DESTRUCTIVE LIST FUNCTIONS

Destructive functions that have non-desctructive equivalents are listed in other sections. See also sort, map-into, nreverse, delete, delete-if, delete-if-not, fill, and replace under SEQUENCE FUNCTIONS, setf under SYMBOL FUNCTIONS, and mapcan, mapcon, nsubst, nsublis, nintersection, nunion, nset-difference, and nset-exclusive-or under LIST FUNCTIONS.

REPLACE THE CAR OF A LIST NODE

(rplaca <list> <expr>)

<list> the list node

<expr> the new value for the car of the list node

returns the list node after updating the car

REPLACE THE CDR OF A LIST NODE

(rplacd <list> <expr>)

<list> the list node

<expr> the new value for the cdr of the list node

returns the list node after updating the cdr

DESTRUCTIVELY CONCATENATE LISTS

(nconc <list>...)

<list> lists to concatenate

returns the result of concatenating the lists

SUBSTITUTE EXPRESSIONS

(nsubst-if <to> <test> <expr> &key :key)

(nsubst-if-not <to> <test> <expr> &key :key)

<to> the new expression

<test> function of one argument to test each subtree

<expr> the expression in which to do the substitutions

:key function to apply to test function argument (defaults to identity)
returns the expression with substitutions

XLISP-PLUS - Version 2.1g - Tom Almy tom.almy@tek.com - 18 JUL 94

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