Function compare

code/songhop/www/lib/angular/angular.js:17574–17608

(v1, v2)

          : comp;
    }
    function compare(v1, v2) {
      var t1 = typeof v1;
      var t2 = typeof v2;
      // Prepare values for Abstract Relational Comparison
      // (http://www.ecma-international.org/ecma-262/5.1/#sec-11.8.5):
      // If the resulting values are identical, return 0 to prevent
      // incorrect re-ordering.
      if (t1 === t2 && t1 === "object") {
        // If types are both numbers, emulate abstract ToPrimitive() operation
        // in order to get primitive values suitable for comparison
        t1 = typeof (v1.valueOf ? v1 = v1.valueOf() : v1);
        t2 = typeof (v2.valueOf ? v2 = v2.valueOf() : v2);
        if (t1 === t2 && t1 === "object") {
          // Object.prototype.valueOf will return the original object, by
          // default. If we do not receive a primitive value, use ToString()
          // instead.
          t1 = typeof (v1.toString ? v1 = v1.toString() : v1);
          t2 = typeof (v2.toString ? v2 = v2.toString() : v2);

          // If the end result of toString() for each item is the same, do not
          // perform relational comparison, and do not re-order objects.
          if (t1 === t2 && v1 === v2 || t1 === "object") return 0;
        }
      }
      if (t1 === t2) {
        if (t1 === "string") {
           v1 = v1.toLowerCase();
           v2 = v2.toLowerCase();
        }
        if (v1 === v2) return 0;
        return v1 < v2 ? -1 : 1;
      } else {
        return t1 < t2 ? -1 : 1;
      }
    }
  };
}