QGIS/resources/function_help/json/replace

{
  "name": "replace",
  "type": "function",
  "description": "Returns a string with the supplied string, array, or map of strings replaced.",
  "variants": [
  { "variant": "String & array variant",
      "variant_description": "Returns a string with the supplied string or array of strings replaced by a string or an array of strings.",
      "arguments": [ {"arg":"string","description":"the input string"},
                     {"arg":"before","description":"the string or array of strings to replace"},
                     {"arg":"after","description":"the string or array of strings to use as a replacement"}],
      "examples": [ { "expression":"replace('QGIS SHOULD ROCK','SHOULD','DOES')", "returns":"'QGIS DOES ROCK'"},
                    { "expression":"replace('QGIS ABC',array('A','B','C'),array('X','Y','Z'))", "returns":"'QGIS XYZ'"},
                    { "expression":"replace('QGIS',array('Q','S'),'')", "returns":"'GI'"} ] },
  { "variant": "Map variant",
      "variant_description": "Returns a string with the supplied map keys replaced by paired values.",
      "arguments": [ {"arg":"string","description":"the input string"},
                     {"arg":"map","description":"the map containing keys and values"} ],
      "examples": [ { "expression":"replace('APP SHOULD ROCK',map('APP','QGIS','SHOULD','DOES'))", "returns":"'QGIS DOES ROCK'"} ]
  }]
}