/** from https://stackoverflow.com/questions/7616461/generate-a-hash-from-string-in-javascript
 *
 * returns a no-collision deterministic number for a string. can be useful for indexes in the frontend, for example
 */
export const hashCode = (string: string | undefined) => {
  if (!string) {
    return -1;
  }
  var hash = 0,
    i,
    chr;
  if (string.length === 0) return hash;
  for (i = 0; i < string.length; i++) {
    chr = string.charCodeAt(i);
    hash = (hash << 5) - hash + chr;
    hash |= 0; // Convert to 32bit integer
  }
  // this ensures it's always positive
  return hash >>> 0;
};