Javascript Enum To Corresponding String Value

Question

So I have this in the javascript for my page:

var TEST_ERROR  = {
        \'SUCCESS\'   :   0,
        \'FAIL\'      :   -1,
        \'ID_ERROR\'  :   -2
            


        

Answer 1

Not quite optimal, but the cleanest you can get without pre-computing the reverse dictionary (and besides, this shouldn't be too much of an issue if you only have a few enumeration values):

function string_of_enum(enum,value) 
{
  for (var k in enum) if (enum[k] == value) return k;
  return null;
}