String conversion to undefined/null/number/boolean

Question

Do you know any better and faster way to convert a string to the type it represents?

I\'ve always been using this function:

var convertType = functio         


        

Answer 1

var string2literal = function (value){
  var maps = {
   "NaN": NaN,
   "null": null,
   "undefined": undefined,
   "Infinity": Infinity,
   "-Infinity": -Infinity
   }
  return ((value in maps) ? maps[value] : value);
};

There are many weird rules in dynamic data type converting, just map it.