我正在嘗試更新或刪除（然后重寫）node.js 中的 JSON 密鑰JSON：{"users":[{"Discordid":"discid","Username":"user","Password":"pass","School":"schoolname"}, {"Discordid":"discid1","Username":"user1","Password":"pass1","School":"schoolname1"}]}我想{"Discordid":"discid","Username":"user","Password":"pass","School":"schoolname"} 通過for 循環刪除整個內容，因此我使用變量，該變量a等于我要刪除的數據的數量。我努力了：fs.readFile('databases/magistercredentials.json', 'utf-8', function (err, data1) {     if (err) throw err     var magistercreds = JSON.parse(data1)     for (a = 0; a < Object.keys(magistercreds.users).length; a++) delete magistercreds.users[a]和其他一切都不起作用的事情。