Typescript 如何在类型脚本中使用条件陈述循环

在您的场景中，您不需要搜索喜欢的频道.您只需判断频道是否已处于Collection 夹中即可.您可以使用some来实现它:

export = {
  name: 'addfav',
  aliases: ['Addfav'],
  type: CommandTypes.PrefixCommand,
  channelWhitelist: ['1147233774938107966'],
  ownerOnly: true,
  async execute(message: Message): Promise<void> {
    if (!message.mentions.channels.map((m) => m).length) {
      await message.reply('Did you forget to add the channel?');
      return;
    }
    let channelName = await message.content.replace(/\D/g, '');
    // get favaorited channels
    const favoritedChannels = await checkfav(message.author.id);
    const isFavorite = favoritedChannels.some((fav) => fav.channel === channelName)  
    if(isFavorite) {
      await message.reply('You already have this channel favorited');
      return;
    }
    await addfav(channelName);
    await message.reply('Channel added');
  },
};

然而，如果您确实需要迭代数组并对每个元素运行Expressc函数，则可以这样做:

  const favoritedChannels = await checkfav(message.author.id);
  for await (const channel of favoritedChannels) {
    await doSomething(channel);
  }

或者您可以并行运行:

  const favoritedChannels = await checkfav(message.author.id);
  const results = await Promise.all(favoritedChannels.map(channel => doSomething(channel));