Melt butter, add sugar, salt, and egg. Cook until thick. Add dates and continue cooking about 4-5 minutes, stirring constantly. Pour over Rice Krispies and nuts. Stir until well blended. Drop by teaspoonfuls into a bowl of coconut. Roll ball to cover with coconut and place on waxed paper. Cool 30 min. Store in an airtight metal container. Cookies may be rolled in chopped pecans instead of coconut.