{
  "name": "array_find",
  "type": "function",
  "description": "Returns the index (0 for the first one) of a value within an array. Returns -1 if the value is not found.",
  "arguments": [ {"arg":"array","description":"an array"},
                 {"arg":"value","description":"the value to search"}],
  "examples": [ { "expression":"array_find(array(1,2,3),2)", "returns":"1"}]
}