json.set store $ '{"store":{"book":[{"category":"reference","author":"Nigel Rees","title":"Sayings of the Century","price":8.95,"size":[10,20,30,40]},{"category":"fiction","author":"Evelyn Waugh","title":"Sword of Honour","price":12.99,"size":[50,60,70,80]},{"category":"fiction","author":"Herman Melville","title":"Moby Dick","isbn":"0-553-21311-3","price":8.99,"size":[5,10,20,30]},{"category":"fiction","author":"J. R. R. Tolkien","title":"The Lord of the Rings","isbn":"0-395-19395-8","price":22.99,"size":[5,6,7,8]}],"bicycle":{"color":"red","price":19.95}}}'
OK

json.get store '$.store.book[?(@.price<10)].size' 
"[[10,20,30,40],[5,10,20,30]]"

json.arrindex store '$.store.book[?(@.price<10)].size' 20
(integer) 1

json.arrindex store '$.store.book[?(@.price<10)].size' 20
"[1,2]"

json.arrindex store '$.store.book[?(@.price<10)].size' 20
"{\"$.store.book[0].size\":1,\"$.store.book[2].size\":2}"

json.arrindex store '$.store.book[?(@.price<10)].size' 20
"[\"$.store.book[0].size\",1,\"$.store.book[2].size\",2]"