QGIS/resources/function_help/json/array_first

{
  "name": "array_first",
  "type": "function",
  "groups": ["Arrays"],
  "description": "Returns the first value of an array.",
  "arguments": [ {"arg":"array","description":"an array"} ],
  "examples": [ { "expression":"array_first(array('a','b','c'))", "returns":"'a'"}]
}