X-Git-Url: https://code.delx.au/gnu-emacs-elpa/blobdiff_plain/8932f000a3cf1c0649ae2f4cb14a6b43d6e09e12..54a75e6f7c580d5821e8b6f695b3c51240f966cd:/packages/seq/seq.el

diff --git a/packages/seq/seq.el b/packages/seq/seq.el
index 3fd7cf735..58f69032c 100644
--- a/packages/seq/seq.el
+++ b/packages/seq/seq.el
@@ -4,7 +4,7 @@
 
 ;; Author: Nicolas Petton <nicolas@petton.fr>
 ;; Keywords: sequences
-;; Version: 1.9
+;; Version: 1.11
 ;; Package: seq
 
 ;; Maintainer: emacs-devel@gnu.org
@@ -165,8 +165,7 @@ If SEQ is empty, return INITIAL-VALUE and FUNCTION is not called."
       acc)))
 
 (defun seq-some (pred seq)
-  "Return non-nil if (PRED element) is non-nil for any element in SEQ, nil otherwise.
-If so, return the non-nil value returned by PRED."
+  "Return the first value for which if (PRED element) is non-nil for in SEQ."
   (catch 'seq--break
     (seq-doseq (elt seq)
       (let ((result (funcall pred elt)))
@@ -224,6 +223,17 @@ Equality is defined by TESTFN if non-nil or by `equal' if nil."
                 (funcall (or testfn #'equal) elt e))
               seq))
 
+(defun seq-position (seq elt &optional testfn)
+  "Return the index of the first element in SEQ that is equal to ELT.
+Equality is defined by TESTFN if non-nil or by `equal' if nil."
+  (let ((index 0))
+    (catch 'seq--break
+      (seq-doseq (e seq)
+        (when (funcall (or testfn #'equal) e elt)
+          (throw 'seq--break index))
+        (setq index (1+ index)))
+      nil)))
+
 (defun seq-uniq (seq &optional testfn)
   "Return a list of the elements of SEQ with duplicates removed.
 TESTFN is used to compare elements, or `equal' if TESTFN is nil."