TypeError: Cannot read property 'RecId' of undefined app script code example

Example 1: TypeError: Cannot read property 'RecId' of undefined app script

var labels = wsData.getRange(1, 1, 1, wsData.getLastColumn()).getValues().map(function(row){
  return row[0];
});

Example 2: TypeError: Cannot read property 'RecId' of undefined app script

var labels = wsData.getRange(1, 1, 1, wsData.getLastColumn()).getValues()[0]