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+# $EPIC: corfilter.txt,v 1.3 2007/03/02 02:32:04 jnelson Exp $
+======Synopsis:======
+$[[corfilter]](<string> <var1> <var2>)
+======Description:======
+The <string> argument is a [[what is a word|dword]], which is different
+than most functions.
+This function is the reverse operation of [[cofilter]], and the
+complementary operation of [[corpattern]].
+This function is closely related to [[rfilter]], which returns all of the
+wildcard patterns in a word list that do not match a literal string.
+All of the cor* functions take a literal string, and two variable names.
+The first variable should contain a word list of wildcard patterns, and
+the second variable should contain a word list.  The string is matched
+against each of the patterns in the first list, and depending on the result,
+the corresponding word in the second list is included or excluded in the
+resturn value.
+The [[corfilter]] function returns all those words in $<var2> that
+correspond in position to those patterns in $<var1> that do not
+match the <string>.
+Parsing ends whenever the shorter of the two word lists runs out of words.
+Therefore, the two word lists should have the same number of words.
+The literal <string> may be optionally surrounded by double quotes,
+if the word contains spaces.  The double quotes are not considered part
+of the string for the purposes of matching.
+======Returns:======
+The words from $<var2> that correspond to all of the words in $<var1>
+that are not matched by <pattern>.
+======Examples:======
+<file>
+@ friends = [ooga!bob@*.foo.com *!tom@*.com]
+@ levels  = [20 10]
+$corfilter(ooga!bob@lace.foo.com friends levels)       returns "10"
+$corfilter(hype!tom@bar.com friends levels)            returns "20"
+</file>