From the NannyMUD documentation

LAST CHANGE

2000-12-19

FUNCTION

NAME
        implode_nicely - Implode an array of words to an English list.


SYNTAX
        string implode_nicely(string *words, string del)

DESCRIPTION
        This function implodes a list of words to a semantically correct
        list in English. That is, ({"green","red","blue"}) will be imploded
        to "green, red, and blue" if 'del' is "and" or no 'del' is given
        at all.


EXAMPLE
        > eval implode_nicely( ({ "red", "green", "blue" }), "or")
        Result: "red, green or blue"
        > eval implode_nicely( ({ "north", "south", "west" }))
        Result: "north, south and west"
        > eval implode_nicely( ({ "foo", "bar" }))
        Result: "foo and bar"
        > eval implode_nicely( ({ "foo" }))
        Result: "foo"