Synopsis:
$ common (<word list> / <word list>)
$ diff (<word list> / <word list>)
Technical:
These functions are exact opposites. The $ common () function finds and
returns all words common to both input lists. The $ diff () function
funds are returns all words present in only one list. The two input
lists must be separated by a single forward-slash. Whitespace is not
significant.
Practical:
These functions might be considered useful for statistical information.
For instance, given 2 channels, they could be used to show who is and
isn't on both of them.
Returns:
common: words in both lists
diff: words not in both lists
Examples:
$common(one two three / two three four) returns "two three"
$common(one two / three four) returns "" (empty string)
$diff(one two three / two three four) returns "one four"
$diff(one two / one two) returns "" (empty string)
See Also:
common (6); remws (6); uniq (6)
