winnow/lib/filter-and-transform/helpers/create-integer-hash.js

Apply sql-like filters to GeoJSON

const hashFunction = require('./hash-function')

module.exports = function createIntegerHash (inputStr) {
  // Hash to 32 bit unsigned integer
  const hash = hashFunction(inputStr)
  // Normalize to range of postive values of signed integer
  return Math.round((hash / 4294967295) * (2147483647))
}