mirror/guile
mirror/guile
1
Fork 0
mirror of https://git.savannah.gnu.org/git/guile.git synced 2025-06-11 06:20:23 +02:00
Code Activity

(SRFI-1 Searching): In list-index, note 0 based

Browse source 
index and #f for not found.
This commit is contained in:
Kevin Ryde 2005-01-19 23:35:38 +00:00
parent 67bcd1103b
commit 0166e7f200
1 changed files with 14 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

16
doc/ref/srfi-modules.texi
View file

@ -706,8 +706,20 @@ If one of @var{lst1} @dots{} @var{lstN} is empty then no calls to
@var{pred} are made, and the return is @code{#t}.
@end deffn
@deffn {Scheme Procedure} list-index pred lst1 lst2 @dots{}
Return the index of the leftmost element that satisfies @var{pred}.
@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.
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}.
@example
(list-index odd? '(2 4 6 9)) @result{} 3
(list-index = '(1 2 3) '(3 1 2)) @result{} #f
@end example
@end deffn
@deffn {Scheme Procedure} member x lst [=]