You can use the following spec
```json [ { // group by LastN/FrstN removed key names "operation": "shift", "spec": { "*": { "*LastN*": { "@": "@2,policy.&(1,1)fullna&(1,2)" }, "*FrstN*": { "@": "@2,policy.&(1,1)fullna&(1,2)" } } } }, { // concatenate the components of the arrays respectively "operation": "modify-overwrite-beta", "spec": { "*": { "*ful*": "=join(' ',@(1,&))" } } }, { "operation": "shift", "spec": { "*": { "*": { "@": "[#2].&", "$1": "[#2].policy" // deliver back the policy attribute to those objects } } } } ] ```

It's important to determine the grouping criteria in order to form upcoming objects will depend on
```json [ { // group by Last/Frs removed key names "operation": "shift", "spec": { "*": { "*Last*": { "@": "@2,policy.&(1,1).&(1,1)fullname" // in &(1,1) : the first 1 represents going 1 level up the tree // the second 1 represents the replacement for the 1st asterisk }, "*Frs*": { "@": "@2,policy.&(1,1).&(1,1)fullname" } } } }, { // concatenate the pairs by their key names respectively "operation": "modify-overwrite-beta", "spec": { "*": { "*": { "*": "=join(' ',@(1,&))" } } } }, { "operation": "shift", "spec": { "*": { "*": { "*": "[#2].&", "$1": "[#2].policy" // deliver back the policy attribute to those objects } } } } ] ``` the ***demo*** on the site http://jolt-demo.appspot.com/ is :
[![enter image description here][1]][1]

[1]: https://i.stack.imgur.com/6lfax.jpg