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(SRFI-1 Searching): In member, note `=' called arg order.

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This commit is contained in:
Kevin Ryde 2005-01-23 21:16:46 +00:00
parent 2f0a4e3072
commit ca04a5aef6
1 changed files with 12 additions and 5 deletions
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17
doc/ref/srfi-modules.texi
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@ -724,12 +724,19 @@ no set of elements pass then the return is @code{#f}.
@deffn {Scheme Procedure} member x lst [=]
Return the first sublist of @var{lst} whose @sc{car} is equal to
@var{x}. If @var{x} does no appear in @var{lst}, return @code{#f}.
Equality is determined by the equality predicate @var{=}, or
@code{equal?} if @var{=} is not given.
@var{x}. If @var{x} does not appear in @var{lst}, return @code{#f}.
This function extends the core @code{member} by accepting an equality
predicate. (@pxref{List Searching})
Equality is determined by @code{equal?}, or by the equality predicate
@var{=} if given. @var{=} is called @code{(= @var{x} elem)},
ie.@: with the given @var{x} first, so for example to find the first
element greater than 5,
@example
(member 5 '(3 5 1 7 2 9) <) @result{} (7 2 9)
@end example
This version of @code{member} extends the core @code{member}
(@pxref{List Searching}) by accepting an equality predicate.
@end deffn