Purpose: Increments by one the value of a specified array reference. This operation is atomic. If the array reference does not exist, it is created with a value of 1. The new incremented value is returned.
Note that no pre-declaration of either the array name or its subscripting structure is required. Creation of array records is totally dynamic.
The array node to be incremented. This takes the format:
You may specify no subscripts at all, in which case the top-level node is incremented,eg:
Incrementing the first level of subscripting would look like:
Incrementing the second level of subscripting would look like:
Note that subscripts can be numeric or text. Text subscripts must be wrapped in double quote (") characters. Quoting of numeric subscripts is optional.
Single-line integer response
Server: :[new incremented value]
If test1["a","b"] does not yet exist:
Client: INCR test1["a","b"] Server: :1
If the command is repeated:
Client: INCR test1["a","b"] Server: :2
We can confirm the new value of test1["a","b"]:
Client: GET test1["a","b"] Server: $1 Server: 2
For those familiar with the native language of GT.M and Caché systems, the above two examples are the equivalent of: