MAP(pageVars.groceryList, SET_KEY( item, "index", index ))
current.index+1 + ". " + current.name
LOOKUP(REDUCE(pageVars.groceryList, IF(item.price < accumulator.price, item, accumulator)), "name")
MERGE( [ {item: "ketchup", manufacturer: "Heinz"} , {item: "ketchup", price: 3.00} ] )