gistfile1.js

obj = sharejs.open('http://foo:3300/', 'doc_name', 'json')
obj.on('changed', function (ev) {...})
obj.at().set({}) // initial document
foo = obj.at('foo')
foo.set([0])                 // { p: ['foo'], oi: [0] }
foo.push(3)                  // { p: ['foo', 1], li: 3 }
foo.insert(0, ['bar'])       // { p: ['foo', 0], li: ['bar'] }
foo.get()                    // => [['bar'],0,3]
foo.at(0).push('baz')        // { p: ['foo',0,1], li: 'baz' }

obj.get() // => { 'foo': [['bar','baz'],0,3] }