JOIN

Combines the elements in an array into a single text value using the argument as a separator.

Syntax 

JOIN(array, join_text)

Examples 

Example 1

Input

{
  "my_action": {
    "message": [
      "north",
      "south",
      "east",
      "west"
    ]
  }
}

Formula

JOIN(my_action.message, "and")

Output

"north and south and east and west"
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