Vector products: Difference between revisions

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 <lang ruby>class Vector(x, y, z) {
     method ∙(vec) {
-        self[:x]*vec[:x] + self[:y]*vec[:y] + self[:z]*vec[:z];
+        self[:x..:z] »*« vec[:x..:z] [+];
     }
     method ⨉(vec) {
-        __CLASS__(self[:y]*vec[:z] - self[:z]*vec[:y],
+        Vector(self[:y]*vec[:z] - self[:z]*vec[:y],
-                  self[:z]*vec[:x] - self[:x]*vec[:z],
+               self[:z]*vec[:x] - self[:x]*vec[:z],
-                  self[:x]*vec[:y] - self[:y]*vec[:x],
+               self[:x]*vec[:y] - self[:y]*vec[:x]);
-                 );
     }