uuid.js 815 B

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  1. function uuid(len, radix) {
  2. var chars = '0123456789abcdef'.split('');
  3. var uuid = [],
  4. i;
  5. radix = radix || chars.length;
  6. if (len) {
  7. // Compact form
  8. for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random() * radix];
  9. } else {
  10. // rfc4122, version 4 form
  11. var r;
  12. // rfc4122 requires these characters
  13. uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
  14. uuid[14] = '4';
  15. // Fill in random data. At i==19 set the high bits of clock sequence as
  16. // per rfc4122, sec. 4.1.5
  17. for (i = 0; i < 36; i++) {
  18. if (!uuid[i]) {
  19. r = 0 | Math.random() * 16;
  20. uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
  21. }
  22. }
  23. }
  24. return uuid.join('');
  25. }
  26. export default uuid