Nodejs String to Enum Convert toEnum(Type)

Method Source Code

"use strict";// w w w  . ja  va2s . co m
var toEnum = function (string, Type) {
    var value = parseFloat(Type[string.trim()].valueOf());
    if (isNaN(value)) {
        throw new Error("Coundn't resolve string to an Enum value.");
    }
    return value;
};
String.prototype.toEnum = function (Type) {
    return toEnum(this, Type);
};

Related

1. toEnumFlag(Type)

   "use strict";
   var toEnumFlag = function (string, Type) {
       var keys = string.split(",");
       var intList = keys.filter(function (string) {
           return Type[string.trim()] == null ? false : true;
       }).map(function (string) {
           return Type[string.trim()];
       });
       if (intList.length === 0) {
   ...
   

2. toEnumFlagString(Type)

   Number.prototype.toEnumFlagString = function (Type) {
       var value = this.valueOf();
       var response = Object.keys(Type).filter(function (key) {
           return ((value & Type[key]) == Type[key]) && Type[key] != 0 && typeof Type[key].name === "string";
       }).map(function (key) {
           return Type[key].name || key;
       }).join(", ");
       return (response.length > 0 ? response : "None");
   };
   ...
   

3. toEnumString(Type)

   Number.prototype.toEnumString = function (Type) {
       var number = this.valueOf();
       var response = Object.keys(Type).filter(function (key) {
           return Type[key] != null && typeof Type[key].name === "string" && Type[key].valueOf() === number.valueOf();
       });
       var string = response[0];
       if (string == null) {
           throw new Error("Couldn't find Enum string value.");
       return string;
   };