If separators are meant to be put before each item, as in comma-first style, they shouldn't have been commas in the first place. Commas should be used just like

If separators are meant to be put before each item, as in comma-first style, they shouldn't have been commas in the first place. Commas should be used just like they're used in natural written language. If I were to design a language that uses comma-first style, I'd replace commas with bullets: var a = "ape" • b = "bat" • c = "cat" • d = "dog"