Bug in solution of this task: https://javascript.info/array-methods#create-keyed-object-from-array

There's a bug in the solution posted in this task.
The task requires us to group objects by id and put the grouped objects in an array keyed by id.
The solution posted is:

function groupById(array) {
  return array.reduce((obj, value) => {
    obj[value.id] = value;
    return obj;
  }, {})
}

However, this does not work when there are items in array with same id.
To accomplish the task correctly, the solution should be:

function groupById(array) {
  return array.reduce((obj, value) => {
    obj[value.id] == undefined ? obj[value.id] = [value] : obj[value.id].push(value);
    return obj;
  }, {})
}

打开 javascript.info/array-methods#create-keyed-object-from-array 中的数组方法任务，并将其中提出的分组要求与发布的 reduce 解决方案进行比较。更新文档中的解决方案，使重复的 ID 保留所有分组对象，然后验证示例和说明仍与修正后的结果一致。