A custom comparator that converts strings to number and compares them. Demonstrates usage in sap.ui.model.Sorter.

sap.ui.model.Sorter: Custom Sort Comparator

// String to Number Comparator
var oSorter = new sap.ui.model.Sorter("path");
oSorter.fnCompare = function (a, b) {
  var valA = parseInt(a, 10);
  var valB = parseInt(b, 10);

  if (isNaN(valA)) return 1;
  if (isNaN(valB)) return -1;
  if (isNaN(valA) && isNaN(valB)) return 0;

  return valA - valB;
}

// newer SAPUI5 versions > 1.36
// new sap.ui.model.Sorter(sPath, bDescending?, vGroup?, fnComparator?)
var oSorter = new sap.ui.model.Sorter("path", true, false, function (a, b) {
  var valA = parseInt(a, 10);
  var valB = parseInt(b, 10);

  if (isNaN(valA)) return 1;
  if (isNaN(valB)) return -1;
  if (isNaN(valA) && isNaN(valB)) return 0;

  return valA - valB;
});