titleCase for Google Sheets in Apps Script

// usage: select a range to titlecase. go to tools / script edit. run myFunction.

function myFunction() {
  var selection = SpreadsheetApp.getActiveSpreadsheet().getSelection();
  var ranges =  selection.getActiveRangeList().getRanges();
  for (var i = 0; i < ranges.length; i++) {
     Logger.log('Active Ranges: ' + ranges[i].getA1Notation());
     var range = ranges[i];
     for (var y = 1; y <= range.getHeight(); y++) {
       for (var x = 1; x <= range.getWidth(); x++) {
         var cell = range.getCell(y, x);
         var v = cell.getValue();
         if (v === undefined) return;
         cell.setValue(titleCase(v));
       }
     }
  }
}

function titleCase(str) {
   var splitStr = str.toLowerCase().split(' ');
   for (var i = 0; i < splitStr.length; i++) {
       splitStr[i] = splitStr[i].charAt(0).toUpperCase() + splitStr[i].substring(1);     
   }
   return splitStr.join(' '); 
}