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Diffstat (limited to 'doc/lispref/sequences.texi')
| -rw-r--r-- | doc/lispref/sequences.texi | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/doc/lispref/sequences.texi b/doc/lispref/sequences.texi index 2ee19efb1a9..214b1e76e15 100644 --- a/doc/lispref/sequences.texi +++ b/doc/lispref/sequences.texi @@ -898,6 +898,27 @@ use instead of the default @code{equal}. @end example @end defun +@defun seq-positions sequence elt &optional testfn + This function returns a list of the (zero-based) indices of the +elements in @var{sequence} for which @var{testfn} returns +non-@code{nil} when passed the element and @var{elt} as +arguments. @var{testfn} defaults to @code{equal}. + +@example +@group +(seq-positions '(a b c a d) 'a) +@result{} (0 3) +@end group +@group +(seq-positions '(a b c a d) 'z) +@result{} nil +@end group +@group +(seq-positions '(11 5 7 12 9 15) 10 #'>=) +@result{} (0 3 5) +@end group +@end example +@end defun @defun seq-uniq sequence &optional function This function returns a list of the elements of @var{sequence} with |