Class Properties

// Deletes all user properties.
var userProperties = PropertiesService.getUserProperties();
userProperties.deleteAllProperties();

// Deletes the user property 'nickname'.
var userProperties = PropertiesService.getUserProperties();
userProperties.deleteProperty('nickname');

// Sets several properties, then logs the value of each key.
var scriptProperties = PropertiesService.getScriptProperties();
scriptProperties.setProperties({
  'cow': 'moo',
  'sheep': 'baa',
  'chicken': 'cluck'
});
var keys = scriptProperties.getKeys();
Logger.log('Animals known:');
for (var i = 0; i < keys.length; i++) {
  Logger.log(keys[i]);
}

// Sets several script properties, then retrieves them and logs them.
var scriptProperties = PropertiesService.getScriptProperties();
scriptProperties.setProperties({
  'cow': 'moo',
  'sheep': 'baa',
  'chicken': 'cluck'
});

var animalSounds = scriptProperties.getProperties();

// Logs:
// A chicken goes cluck!
// A cow goes moo!
// A sheep goes baa!
for (var kind in animalSounds) {
  Logger.log('A %s goes %s!', kind, animalSounds[kind]);
}

// Gets the user property 'nickname'.
var userProperties = PropertiesService.getUserProperties();
var nickname = userProperties.getProperty('nickname');
Logger.log(nickname);

// Sets multiple user properties at once.
var userProperties = PropertiesService.getUserProperties();
var newProperties = {nickname: 'Bob', region: 'US', language: 'EN'};
userProperties.setProperties(newProperties);

// Sets multiple user properties at once while deleting all other user properties.
var userProperties = PropertiesService.getUserProperties();
var newProperties = {nickname: 'Bob', region: 'US', language: 'EN'};
userProperties.setProperties(newProperties, true);

// Sets the user property 'nickname' to 'Bobby'.
var userProperties = PropertiesService.getUserProperties();
userProperties.setProperty('nickname', 'Bobby');