Generate a uuid collection using JS

/*! Math. UUID. JS (v1.4) http://www.broofa.commailto: robert@broofa.comCopyright (c) 2010 Robert kiefferdual licensed under the MIT and GPL licenses. * // ** generate a random UUID. ** usage: math. UUID (length, Radix) * length-the desired number of characters * Radix-the number of allowable values for each character. ** examples: * // no arguments-returns rfc4122, version 4 ID *> math. UUID () * "92 329d39-6f5c-4520-abfc-aab64544e172 "** // one argument-returns ID of the specified length *> math. UUID (15) // 15 character ID (default base = 62) * "vcydxgltxrvzstv" ** // two arguments-returns ID of the specified length, and Radix. (Radix must be <= 62) *> math. UUID (8, 2) // 8 character ID (base = 2) * "01001010" * >>> math. UUID (8, 10) // 8 character ID (base = 10) * "47473046" * >>> math. u UID (8, 16) // 8 character ID (base = 16) * "098f4d35" */(function () {// Private array of chars to use VaR chars = '0123456789abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxy '. split (''); math. UUID = function (Len, Radix) {var chars = chars, UUID = [], I; Radix = Radix | chars. length; If (LEN) {// compact form for (I = 0; I <Len; I ++) UUID [I] = chars [0 | math. random () * Radix];} else {// rfc4 122, version 4 form var R; // rfc4122 requires these characters UUID [8] = UUID [13] = UUID [18] = UUID [23] = '-'; UUID [14] = '4'; // fill in random data. at I = 19 set the high bits of clock sequence as // per rfc4122, sec. 4.1.5 for (I = 0; I <36; I ++) {If (! UUID [I]) {r = 0 | math. Random () * 16; UUID [I] = chars [(I = 19 )? (R & 0x3) | 0x8: R] ;}} return UUID. join ('') ;}; // a more than T, but slightly bulkier, rfc4122v4 solution. we boost performance // by minimizing callto random () math. uuidfast = function () {var chars = chars, UUID = new array (36), RND = 0, R; For (VAR I = 0; I <36; I ++) {if (I = 8 | I = 13 | I = 18 | I = 23) {UUID [I] = '-';} else if (I = 14) {UUID [I] = '4';} else {If (RND <= 0x02) r ND = 0x2000000 + (math. random () * 0x1000000) | 0; r = RND & 0xf; RND = RND> 4; UUID [I] = chars [(I = 19 )? (R & 0x3) | 0x8: R] ;}} return UUID. join ('') ;}; // a more compact, but less than T, rfc4122v4 solution: math. uuidcompact = function () {return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx '. replace (/[XY]/g, function (c) {var r = math. random () * 16 | 0, V = c = 'X '? R: (R & 0x3 | 0x8); Return v. tostring (16 );});};})();