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-rw-r--r-- | doc/ref/srfi-modules.texi | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/doc/ref/srfi-modules.texi b/doc/ref/srfi-modules.texi index edc5ccd31..d1c0d76ac 100644 --- a/doc/ref/srfi-modules.texi +++ b/doc/ref/srfi-modules.texi @@ -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 |