export function uniqueId() {
  return 'f'
    + Math.random().toString(16).replace('.', '')
    + (+new Date()).toString(16);
}

export function keyBy(array, keyfunc) {
  let result = {};
  for(let item of array) {
    if (typeof keyfunc == 'string') {
      result[item[keyfunc]] = item;
    } else {
      result[keyfunc(item)] = item;
    }
  }
  return result;
}

export function objCopy(object) {
  return JSON.parse(JSON.stringify(object));
}

export function castId(id) {
  // TODO no-op after switching to UUIDs
  return +id;
}