ToPrimitiveNoHint.js

ToPrimitiveNoHint.js

//shim of ES5.1 internal ToPrimitive method   
//see http://es5.github.com/#x9.1
//assumes no hint argument (as is the case with == operands)

var ToPrimitiveNoHint = function(value) {
  if (typeof value != 'object') {
    return value;
  }
  if (typeof value.valueOf() != 'object') {
    return value.valueOf();
  }
  if (typeof value.toString() != 'object') {
    return value.toString();
  }
  throw Error("can't convert a to primitive type");
}