In the bowl of your food processor, mix together the nuts and the dates. Process until the pieces are all uniform in size and a sticky dough has formed. Add the vanilla extract and process well until combined. Add the chocolate chips and pulse just until incorporated. Line a sheet pan with parchment paper and pour the dough out onto it. Shape the dough into one large rectangular brick and refrigerate until firm, about 5-10 minutes. Slice the bar into desired shapes. You can also roll this dough into balls straight from the food processor. These raw bars should keep in the refrigerator, in an airtight container, for a few weeks or up to a month in the freezer.