{
  "name": "array_to_string",
  "type": "function",
  "groups": ["Arrays"],
  "description": "Concatenates array elements into a string separated by a delimiter and using optional string for empty values.",
  "arguments": [
    {"arg":"array", "description":"the input array"},
    {"arg":"delimiter","optional":true,"default":"','","description":"the string delimiter used to separate concatenated array elements"},
    {"arg":"empty_value","optional":true,"default":"''","description":"the optional string to use as replacement for empty (zero length) matches"}],
  "examples": [{
    "expression":"array_to_string(array('1','2','3'))",
    "returns":"'1,2,3'"
  }, {
    "expression":"array_to_string(array(1,2,3),'-')",
    "returns":"'1-2-3'"
  }, {
    "expression":"array_to_string(array('1','','3'),',','0')",
    "returns":"'1,0,3'"
  }],
  "tags": ["concatenates", "delimiter", "join", "aggregate"]
}