[t0mek]

Only tangentially related (but hey, it's HN) - I'm so happy about the support/requirements for trailing commas in the modern language syntax:

    x = [
      123,
      456,
      789,
    ];

It makes editing such a list so much easier. Also, the commit diffs are cleaner (you don't need to add comma to the last element when appending a new one).

[echohack5]

The oxford comma debate is so annoying because it clearly has nothing but advantages. Removing commas from a delimited list does nothing to resolve ambiguity, whether lexicographically or syntactically.

It's so useful as a delimiter and anti-ambiguity machine, that you don't even need spaces for it to work! See CSV or Japanese.

[mmooss]

> The oxford comma debate is so annoying because it clearly has nothing but advantages.

.. if you care only about data communication and have no sense of beauty, aesthetics, rhythm or personality in writing.

[Izkata]

My very first programming language doesn't use commas:

  x: [
    123
    456
    789
  ]

[black_knight]

I like this:

    x = [ 123
        , 456
        , 789
        ]

[tommy_axle]

Nah, prepending will lead to a messier diff than the parent example.