In 2.1.0 not support @.length Filter ,but in 2.0.0 support

[ghost]

In 2.0.0 support :

$.store.book[(@.length-2)].author

but in 2.1.0 don't support .

[mika91]

Not working in 2.2.0 anymore.
It was very conveniant to get the last element of an array.

[jochenberger]

In the upcoming version, you'll be able to use negative array indexes, i.e. $.store.book[-1].title to get the last book's title.