给出以下JSON：
id name fullname parent_id
-- ---- ----------------- ---------
1 cat1 cat0 > cat1 null
2 cat2 cat0 > cat1 > cat2 1
3 cat3 cat1 > cat3 1
我们可以使用类似{
"store": {
"book": [
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
},
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
}
],
"bicycle": {
"color": "red",
"price": 19.95
}
},
"expensive": 10
}
的路径表达式来获取所有作者。但是如果我们事先不知道$.store.book[*].author是数组还是对象，例如如果我们可以拥有上述JSON，但也会这样：
book是否有“通用路径”可用于在任何一种情况下获取所有作者？