{
  "name": "array_distinct",
  "type": "function",
  "description": "Returns an array containing distinct values of the given array.",
  "arguments": [
    {"arg":"array","description":"an array"}],
  "examples": [ { "expression":"array_distinct(array(1,2,3,2,1))", "returns":"array: 1,2,3"}
  ]
}