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A bit clearer for:

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(SRFI-1 Searching): In list-index, note 0 based index and #f for not found.
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Kevin Ryde 2005-02-03 22:59:47 +00:00
parent 83743da077
commit d1736abf82
1 changed files with 6 additions and 7 deletions
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13
doc/ref/srfi-modules.texi
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@ -743,14 +743,13 @@ If one of @var{lst1} @dots{} @var{lstN} is empty then no calls to
@end deffn
@deffn {Scheme Procedure} list-index pred lst1 @dots{} lstN
Call @var{pred} on sets of elements from the @var{lst}s, one from each
list, starting from the first, as @code{(@var{pred} elem1 @dots{}
elemN)}. Return the index of the first set for which @var{pred}
returns true.
Return the index of the first set of elements, one from each of
@var{lst1}@dots{}@var{lstN}, which satisfies @var{pred}.
The index starts from 0 for the first first set of elements.
Searching stops when the end of the shortest @var{lst} is reached. If
no set of elements pass then the return is @code{#f}.
@var{pred} is called as @code{(@var{pred} elem1 @dots{} elemN)}.
Searching stops when the end of the shortest @var{lst} is reached.
The return index starts from 0 for the first set of elements. If no
set of elements pass then the return is @code{#f}.
@example
(list-index odd? '(2 4 6 9)) @result{} 3