JSON.ARRPOP

Remove and return element at the index from the array. Popping an empty array returns null.

Examples

Enhanced path syntax:

127.0.0.1:6379> JSON.SET k1 . '[[], ["a"], ["a", "b"]]'
OK
127.0.0.1:6379> JSON.ARRPOP k1 $[*]
1) (nil)
2) "\"a\""
3) "\"b\""
127.0.0.1:6379> JSON.GET k1
"[[],[],[\"a\"]]"

Restricted path syntax:

127.0.0.1:6379> JSON.SET k1 . '[[], ["a"], ["a", "b"]]'
OK
127.0.0.1:6379> JSON.ARRPOP k1
"[\"a\",\"b\"]"
127.0.0.1:6379> JSON.GET k1
"[[],[\"a\"]]"

127.0.0.1:6379> JSON.SET k2 . '[[], ["a"], ["a", "b"]]'
OK
127.0.0.1:6379> JSON.ARRPOP k2 . 0
"[]"
127.0.0.1:6379> JSON.GET k2
"[[\"a\"],[\"a\",\"b\"]]"

RESP2 Reply

• If the path is enhanced syntax:

  • Array reply: Array of bulk strings representing popped values at each path.

  • Nil reply: For each path where the value is an empty array or not an array.

• If the path is restricted syntax:

  • Bulk string reply: The popped JSON value.

  • Nil reply: If the array is empty.

• Simple error reply:

  • if the value at the path is not an array (only for restricted syntax).

RESP3 Reply

• If the path is enhanced syntax:

  • Array reply: Array of bulk strings representing popped values at each path.

  • Null reply: For each path where the value is an empty array or not an array.

• If the path is restricted syntax:

  • Bulk string reply: The popped JSON value.

  • Null reply: If the array is empty.

• Simple error reply:

  • if the value at the path is not an array (only for restricted syntax).