[Uuid] - a unique identification

2020-01-02

UUID, Universally Unique Identifier, a universally unique identifier.

 

// definition of a method of generating uuid
 const getUuid = () => { 
  const S = []
   // define a hexadecimal string 
  const = hexdigits '0123456789abcdef' for (the let I = 0; I <36; I ++ ) {
     // 0x10 hexadecimal number is converted to decimal 16 
    S [I] = hexDigits.substr (Math.floor (Math.random () * 0x10),. 1 ) 
  } // bits 12-15 of The time_hi_and_version to 0010 Field 
  S [14] = '. 4' // bits 6-7 of The clock_seq_hi_and_reserved to 01 // 0x3 to 3, 0x8 is. 8 
  S [. 19] = hexDigits.substr ((S [. 19] && 0x3) || 0x8,. 1 ) 
  S [ . 8] = S [13 is] = S [18 is] = S [23 is] = '-' 
  const UUID
  
  
  
  S.join = ( '' )
   return UUID 
} 
Export default getUuid 

called directly // use getUuid () to