I think 'do not spark joy' is the perfect description. Does it significantly ruin my day? No. Do I just feel a little bit less content with the world when my clean diff has an extra noop deletion and insertion? Yes.
Interesting too that javascript (but not json) seems to allow it. And a comment on that page highlights javascript's _sparse arrays_ which I'd never heard of [0]
I think 'do not spark joy' is the perfect description. Does it significantly ruin my day? No. Do I just feel a little bit less content with the world when my clean diff has an extra noop deletion and insertion? Yes.
Interesting too that javascript (but not json) seems to allow it. And a comment on that page highlights javascript's _sparse arrays_ which I'd never heard of [0]
[0] https://dev.to/damil/beautiful-perl-feature-trailing-commas-... ctrl-f for 'sparse'