View difference between Paste ID: PWG7EvgR and wB5zm9f7

 /// @param string
 /// @jujuadams 2019/04/18
 
 var _string = argument0;
 
 var _fail_value = 0;
 var _hit_space  = false;
 var _hit_number = false;
 
 var _size = string_length(_string);
 for(var _i = _size; _i > 0; _i--)
 {
     var _character = string_char_at(_string, _i);
     switch(_character)
     {
         case "0":
         case "1":
         case "2":
         case "3":
         case "4":
         case "5":
         case "6":
         case "7":
         case "8":
         case "9":
         case ".":
         case "-":
             if (_hit_space && _hit_number) return _fail_value;
             _hit_space  = false;
             _hit_number = true;
         break;
 
         case " ":
             _string = string_delete(_string, _i, 1);
             _hit_space = true;
         break;
 
         default:
             return _fail_value;
         break;
     }
 }
 
 if (string_count("-", _string) > 1) return undefined;
 if (string_count(".", _string) > 1) return undefined;
 
 var _negative_pos = string_pos("-", _string);
 if (_negative_pos > 1) return undefined;
 if (string_pos(".", _string) == (1+_negative_pos)) return undefined;
 
 return real(_string);