Hawaiian Banana Nut Bread

flour 1 cup granulated sugar 1/2 tsp. baking soda 1/2 tsp. salt 2 large eggs 1 tsp. vanilla extract 3/4 cups vegetable oil 1 cup mashed ripe banana (from 2 bananas) 1 can (8 oz.) crushed pineapple, drained 1/2 cup chopped walnuts