How to use

unionWith

function

in

LoDashStatic

async fuzzyQueryByUsername(username: string) {
    let user: User;
    let users: Array<User>;
    [user, users] = await Promise.all([
      this.userRepository.findOne({
        select: {
          id: true,
          username: true,
          avatarURL: true,
        },
        where: { username },
      }),
      this.userRepository.find({
        select: {
          id: true,
          username: true,
          avatarURL: true,
        },
        where: {
          username: Like(`${username}%`),
        },
        take: 10,
      } as any),
    ]);
    users = users || [];
    if (!user) {
      return users;
    }
    return _.unionWith(users, [user], _.isEqual);
  }

 doc.content = _doc.content
 doc.attachments = _.unionWith(doc.attachments, _doc.attachments, (a, b) => a.key === b.key)
 resolve()
}, reject)