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--- syntax:functions:keepbefore [2015/04/03 18:27] – elenap
+++ syntax:functions:keepbefore [2021/03/23 19:07] – dmitry
@@ Line 7: / Line 7: @@
 |  KeepBefore( '5pm', 'pm' )  |  '5'  |
 |  keepbefore('October 2015','2015')  |  'October '  |
+The functions can have the optional third parameter with the index of the separator. The index can be negative - in this case, it's counted from the end of the text.
+^  Example  ^  Result  ^
+|  KeepBefore( 'a/b/c/d', '/', 2)  |  'a/b'  |
+|  keepbefore( 'a/b/c/d', '/', -1)  |  'a/b/c'  |
 === See also ===
   * [[syntax:functions:keepafter]]
   * [[syntax:functions:removestart]]