dojox/uuid/generateRandomUuid.js

• Provides:

  • dojox.uuid.generateRandomUuid

• dojox.uuid.generateRandomUuid

  • type

    Function

  • source: [view]
     var HEX_RADIX = 16;
    
    
     function _generateRandomEightCharacterHexString(){
      // Make random32bitNumber be a randomly generated floating point number
      // between 0 and (4,294,967,296 - 1), inclusive.
      var random32bitNumber = Math.floor( (Math.random() % 1) * Math.pow(2, 32) );
      var eightCharacterHexString = random32bitNumber.toString(HEX_RADIX);
      while(eightCharacterHexString.length < 8){
       eightCharacterHexString = "0" + eightCharacterHexString;
      }
      return eightCharacterHexString; // for example: "3B12F1DF"
     }
    
    
     var hyphen = "-";
     var versionCodeForRandomlyGeneratedUuids = "4"; // 8 == binary2hex("0100")
     var variantCodeForDCEUuids = "8"; // 8 == binary2hex("1000")
     var a = _generateRandomEightCharacterHexString();
     var b = _generateRandomEightCharacterHexString();
     b = b.substring(0, 4) + hyphen + versionCodeForRandomlyGeneratedUuids + b.substring(5, 8);
     var c = _generateRandomEightCharacterHexString();
     c = variantCodeForDCEUuids + c.substring(1, 4) + hyphen + c.substring(4, 8);
     var d = _generateRandomEightCharacterHexString();
     var returnValue = a + hyphen + b + hyphen + c + d;
     returnValue = returnValue.toLowerCase();
     return returnValue; // String
  • summary

    This function generates random UUIDs, meaning "version 4" UUIDs.

  • description

    A typical generated value would be something like this:
    "3b12f1df-5232-4804-897e-917bf397618a"
    
    For more information about random UUIDs, see sections 4.4 and
    4.5 of RFC 4122: http://tools.ietf.org/html/rfc4122#section-4.4
    
    This generator function is designed to be small and fast,
    but not necessarily good.
    
    Small: This generator has a small footprint. Once comments are
    stripped, it's only about 25 lines of code, and it doesn't
    dojo.require() any other modules.
    
    Fast: This generator can generate lots of new UUIDs fairly quickly
    (at least, more quickly than the other dojo UUID generators).
    
    Not necessarily good: We use Math.random() as our source
    of randomness, which may or may not provide much randomness.
    examples:
    var string = dojox.uuid.generateRandomUuid();

  • returns

    for example: "3B12F1DF"|String

• dojox.uuid

  • type

    Object

  • summary

• dojox

  • type

    Object

  • summary