shared/avatars/hash-avatar-to-cdn.js

   1 'use strict';
   2
   3 module.exports = function hash(str) {
   4   if (!str || !str.length) return 1;
   5
   6   /* djb2: http://www.cse.yorku.ca/~oz/hash.html */
   7   var f = 5381;
   8   for (var i = 0; i < str.length && i < 8; i++) {
   9     // Limit to the first 8 chars
  10     f = (f << 5) + f + str.charCodeAt(i); /* hash * 33 + c */
  11   }
  12
  13   return (f > 0 ? f : -f) % 3; // defaults to 4 buckets;
  14 };