ts-cache-updater.ts

export function update<T>(
  cache: T[] | undefined,
  predicate: (value: T, index: number, data: T[]) => boolean,
  updater: (data: T) => T
): T[] | undefined {
  if (!cache) {
    return cache;
  }

  const data = [...cache];
  const index = data.findIndex(predicate);
  const item = data[index];

  if (!item) {
    return data;
  }

  data[index] = updater(item);

  return data;
}