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New arguments to old functions.
- To: info-lispm at MIT-AI
- Subject: New arguments to old functions.
- From: Daniel L. Weinreb <dlw at SCRC-TENEX>
- Date: Fri ,12 Feb 82 16:55:00 EDT
The following two changes were made some time ago, but never generally
The LOAD function now takes a fifth argument named NO-MSG-P. If the
value of this argument is T (it defaults to NIL), then LOAD will not
print out the message that it usually prints (that is, the message that
tells you that a certain file is being loaded into a certain package).
The functions SUBSET and SUBSET-NOT (also known as REM-IF-NOT and
REM-IF) now take a &rest argument, named EXTRA-LISTS, in addition to the
first two arguments. If EXTRA-LISTS is present, each element of
EXTRA-LISTS (that is, each further argument to SUBSET) is a list of
objects to be passed to PREDICATE as PREDICATE's second argument, third
argument, and so on. The reason for this is that PREDICATE might be a
function of many arguments; EXTRA-LISTS lets you control what values are
passed as additional arguments to PREDICATE. However, the list returned
by SUBSET is still a "subset" of those values that were passed as the
first argument in the various calls to PREDICATE.