> JSON.parse('[null,null,null]') > (3) [null, null, null] > JSON.parse('[,,,]') Uncaught SyntaxError... Maybe eventually someone realized this was

> JSON.parse('[null,null,null]') > (3) [null, null, null] > JSON.parse('[,,,]') Uncaught SyntaxError... Maybe eventually someone realized this was horribly inefficient and added an extra step but a series of commas in an array with nothing in between them isn't valid JSON.