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Re:Show HN: hulk, an in-browser JSON editor by hayksaakian on Tuesday July 30, 2013 @12:35AM (#6125397)
It seems like there are overlapping conventions.

"null" means null but => is the separator instead of :

Re:Show HN: hulk, an in-browser JSON editor by kevinburke on Tuesday July 30, 2013 @01:51AM (#6125542)
Agreed! I'd prefer ":" but when I was testing it out it was difficult to pick it out between the input fields. Hence I went with the Ruby convention.

You can change it via the `separator` option in the options menu.