zl:1 - FTP

167
:delete-by-item
rather than:
(setq a (delete 'b a))
(del ete 'b a)
i[n] instances of item are deleted. n is allowed to be zero. If n is greater
than or equal to the number of occurrences of item in the list, all occurrences
of item in the list are deleted.
This Zetalisp function is shadowed by the Common Lisp function of the
same name.
For a table of related items: See the section "Functions for Modifying
Lists" in Symbolics Common Lisp: Language Concepts.
For a table of related items: See the section "Sequence Modification" in
Symbolics Common Lisp: Language Concepts.
:delete-by-item item &optional (equal-predicate #'=) of si:heap
Method
Finds the first item that satisfies equal-predicate, and deletes it, returning
the item and key if it was found, otherwise it signals
si:heap-item-not-found. equal-predicate should be a function that takes two
arguments. The first argument to equal-predicate is the current item from
the heap and the second argument is item.
For a table of related items: See the section "Heap Functions and Methods"
in Symbolics Common Lisp: Language Concepts.
:delete-by-key key &optional (equal-predicate #'=) of si:heap
Method
Finds the first item whose key satisfies equal-predicate and deletes it,
returning the item and key if it was found; otherwise it signals
si:heap-item-not-found. equal-predicate should be a function that takes two
arguments. The first argument to equal-predicate is the current key from
the heap and the second argument is key.
For a table of related items: See the section "Heap Functions and Methods"
in Symbolics Common Lisp: Language Concepts.
I
delete-duplicates sequence &key (test #'eqI) test-not (start 0) end Function
from-end key replace
delete-duplicates compares the elements of sequence pairwise, and if any
two match, then the one occurring earlier in the sequence is discarded.
The returned form is sequence, with enough elements removed such that no
two of the remaining elements match. delete-duplicates is a destructive
function.
sequence can be either a list or a vector (one-dimensional array). Note that
nil is considered to be a sequence, of length zero.