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diff --git a/octave_packages/general-1.3.1/@dict/has.m b/octave_packages/general-1.3.1/@dict/has.m
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+## Copyright (C) 2009 VZLU Prague, a.s., Czech Republic
+##
+## This program is free software; you can redistribute it and/or modify it under
+## the terms of the GNU General Public License as published by the Free Software
+## Foundation; either version 3 of the License, or (at your option) any later
+## version.
+##
+## This program is distributed in the hope that it will be useful, but WITHOUT
+## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+## details.
+##
+## You should have received a copy of the GNU General Public License along with
+## this program; if not, see <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn{Function File} {} has (d, key)
+## Check whether the dictionary contains specified key(s). 
+## Key can be either a string or a cell array. In the first case,
+## the result is a logical scalar; otherwise, the result is a logical array
+## with the same shape as @var{key}.
+## @end deftypefn
+
+## Author: Jaroslav Hajek <highegg@gmail.com>
+
+function b = has (d, key)
+  if (nargin != 2)
+    print_usage ();
+  endif
+
+  if (ischar (key) || iscellstr (key))
+    b = lookup (d.keys, key, "b");
+  else
+    error ("has: invalid key value");
+  endif
+endfunction
+