[{"_1":2,"_221":-5,"_222":-5},"loaderData",{"_3":4,"_11":12},"root",{"_5":-5,"_6":7,"_8":7,"_9":10},"user","admin",false,"impersonating","promo","aktif","routes/drill",{"_13":14,"_19":20,"_21":22,"_23":24,"_25":7,"_26":27},"course",{"_15":16,"_17":18},"slug","flutter-dasar","title","Flutter Dasar: Dart, Widget, dan State","seed",1793975330,"poolSize",58,"seconds",900,"signedIn","questions",[28,56,70,84,98,108,121,135,148,159,168,177,187,197,208],{"_29":30,"_31":32,"_33":34,"_35":36,"_37":38,"_39":40,"_41":42,"_43":44,"_49":50,"_54":-7,"_55":-7},"simId","flt-l9-s2","lessonId","flt-l9","lessonTitle","Misi: layar profil dari sketsa","lessonHref","/belajar/flutter-dasar/misi-layar-profil","module","Widget dan tata letak","type","choice","prompt","Baris statistik berisi tiga kolom yang sama lebar. Susunan mana yang tepat?","options",[45,46,47,48],"Row(mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: [Statistik(transaksi), Statistik(rating), Statistik(hadir)])","Row(children: [Expanded(child: Statistik(transaksi)), Expanded(child: Statistik(rating)), Expanded(child: Statistik(hadir))])","Row(children: [Expanded(child: Statistik(transaksi)), Expanded(flex: 2, child: Statistik(rating)), Expanded(child: Statistik(hadir))])","Column(children: [Expanded(child: Statistik(transaksi)), Expanded(child: Statistik(rating)), Expanded(child: Statistik(hadir))])","code",{"_49":51,"_52":53},"+-------------------------------------------+\n| +--------+ |\n| | Foto | Dewi Lestari |\n| | [Aktif] Kasir - shift pagi |\n| +--------+ |\n| (lencana Aktif menimpa sudut kanan |\n| bawah foto) |\n+--------------+--------------+-------------+\n| 1.250 | 4,8 | 96% |\n| transaksi | rating | hadir |\n| (tiga kolom sama lebar) |\n+--------------+--------------+-------------+\n| Riwayat shift |\n| Senin 07.00-15.00 |\n| Selasa 07.00-15.00 |\n| ... (daftar panjang, bisa digulir, |\n| mengisi sisa tinggi layar) |\n+-------------------------------------------+","lang","text","gambar","unit",{"_29":57,"_31":58,"_33":59,"_35":60,"_37":38,"_39":40,"_41":61,"_43":62,"_49":67,"_54":-7,"_55":-7},"flt-l7-s3","flt-l7","Row, Column, Stack, dan Expanded","/belajar/flutter-dasar/row-column-stack-expanded","Apa urutan lapisan Stack ini dari paling bawah ke paling atas?",[63,64,65,66],"Ikon favorit, kotak teks Nasi Uduk, lalu gambar.","Gambar, kotak teks Nasi Uduk, lalu ikon favorit.","Gambar, ikon favorit, lalu kotak teks, karena Positioned selalu digambar di bawah anak yang tidak diposisikan.","Tidak bertumpuk: ketiganya berjajar menurun seperti di Column.",{"_49":68,"_52":69},"Stack(\n children: [\n Image.asset('img/nasi-uduk.jpg'),\n Container(color: Colors.black45, child: Text('Nasi Uduk')),\n Positioned(top: 8, right: 8, child: Icon(Icons.favorite)),\n ],\n)","dart",{"_29":71,"_31":72,"_33":73,"_35":74,"_37":75,"_39":40,"_41":76,"_43":77,"_49":82,"_54":-7,"_55":-7},"flt-l18-s1","flt-l18","Misi: layar katalog dari API","/belajar/flutter-dasar/misi-layar-katalog-api","Data dari internet dan penyimpanan lokal","Apa yang dicetak program ini?",[78,79,80,81],"4 lalu Kopi Susu, Teh Tarik, Roti Bakar, Es Jeruk","3 lalu Kopi Susu, Roti Bakar, Es Jeruk","1 lalu Teh Tarik","3 lalu (Kopi Susu, Roti Bakar, Es Jeruk)",{"_49":83,"_52":69},"const contohBody = '''\n[\n {\"id\": 11, \"nama\": \"Kopi Susu\", \"harga\": 18000, \"tersedia\": true},\n {\"id\": 12, \"nama\": \"Teh Tarik\", \"harga\": 15000, \"tersedia\": false},\n {\"id\": 13, \"nama\": \"Roti Bakar\", \"harga\": 22000, \"tersedia\": true},\n {\"id\": 14, \"nama\": \"Es Jeruk\", \"harga\": 12000, \"tersedia\": true}\n]\n''';\n\nList olahKatalog(String body) {\n final data = jsonDecode(body) as List;\n return data\n .map((e) => Produk.fromJson(e as Map))\n .where((p) => p.tersedia)\n .toList();\n}\n\nvoid main() {\n final katalog = olahKatalog(contohBody);\n print(katalog.length);\n print(katalog.map((p) => p.nama).join(', '));\n}",{"_29":85,"_31":86,"_33":87,"_35":88,"_37":89,"_39":40,"_41":90,"_43":91,"_49":96,"_54":-7,"_55":-7},"flt-l5-s2","flt-l5","Misi: memperbaiki potongan kode kasir","/belajar/flutter-dasar/misi-kode-kasir","Dart, bahasa di balik Flutter","hitungTotal(['KP', 'TB', 'KP']) seharusnya menghasilkan 45000, tetapi baris di dalam for ditolak analyzer. Perbaikan mana yang benar?",[92,93,94,95],"Ganti barisnya menjadi total += ambilHarga(k) as int;","Ganti barisnya menjadi ambilHarga(k).then((h) => total += h);","Hapus kata async dari hitungTotal, dan biarkan baris di dalam for.","Ganti barisnya menjadi total += await ambilHarga(k);",{"_49":97,"_52":69},"Future ambilHarga(String kode) async => kode == 'KP' ? 18000 : 9000;\n\nFuture hitungTotal(List daftarKode) async {\n var total = 0;\n for (final k in daftarKode) {\n total += ambilHarga(k);\n }\n return total;\n}",{"_29":99,"_31":72,"_33":73,"_35":74,"_37":75,"_39":40,"_41":100,"_43":101,"_49":106,"_54":-7,"_55":-7},"flt-l18-s3","Di aplikasi yang baru dipasang, pengguna mengetuk ikon favorit pada Kopi Susu, Roti Bakar, Kopi Susu, lalu Es Jeruk. Apa isi daftar favorit yang tersimpan?",[102,103,104,105],"[Kopi Susu, Roti Bakar, Kopi Susu, Es Jeruk]","[Roti Bakar, Es Jeruk]","[Es Jeruk]","Tidak ada; ketukan pertama berhenti dengan galat karena getStringList mengembalikan null untuk kunci yang belum ada.",{"_49":107,"_52":69},"Future _ketukFavorit(String nama) async {\n final prefs = await SharedPreferences.getInstance();\n final favorit = prefs.getStringList('favorit') ?? [];\n if (favorit.contains(nama)) {\n favorit.remove(nama);\n } else {\n favorit.add(nama);\n }\n await prefs.setStringList('favorit', favorit);\n setState(() => _favorit = favorit.toSet());\n}",{"_29":109,"_31":110,"_33":111,"_35":112,"_37":75,"_39":40,"_41":113,"_43":114,"_49":119,"_54":-7,"_55":-7},"flt-l15-s2","flt-l15","HTTP dan JSON menjadi objek Dart","/belajar/flutter-dasar/http-dan-json-ke-model","Server mengirim harga sebagai teks. Apa yang terjadi saat program ini dijalankan?",[115,116,117,118],"Tercetak 15000, karena as int mengubah teks angka menjadi int.","Tercetak null, karena kunci harga dianggap tidak cocok.","Tidak ada; program ditolak analyzer karena body berisi harga bertipe teks.","Program berhenti saat berjalan dengan galat type 'String' is not a subtype of type 'int' in type cast.",{"_49":120,"_52":69},"class Produk {\n final int id;\n final String nama;\n final int harga;\n final bool tersedia;\n\n const Produk({\n required this.id,\n required this.nama,\n required this.harga,\n required this.tersedia,\n });\n\n factory Produk.fromJson(Map json) {\n return Produk(\n id: json['id'] as int,\n nama: json['nama'] as String,\n harga: json['harga'] as int,\n tersedia: json['tersedia'] as bool,\n );\n }\n}\n\nvoid main() {\n const body = '{\"id\": 8, \"nama\": \"Teh Tarik\", \"harga\": \"15000\", \"tersedia\": true}';\n final p = Produk.fromJson(jsonDecode(body) as Map);\n print(p.harga);\n}",{"_29":122,"_31":123,"_33":124,"_35":125,"_37":126,"_39":40,"_41":127,"_43":128,"_49":133,"_54":-7,"_55":-7},"flt-l12-s3","flt-l12","Navigasi: pindah layar sambil membawa data","/belajar/flutter-dasar/navigasi-dan-data","State, navigasi, dan formulir","Pengguna menjalankan _pilih, lalu menekan tombol Ambil di toko. Apa yang dicetak?",[129,130,131,132],"Metode: null","Metode: Ambil di toko","Metode: ambil","Metode: kurir",{"_49":134,"_52":69},"class PilihPengiriman extends StatelessWidget {\n const PilihPengiriman({super.key});\n\n @override\n Widget build(BuildContext context) {\n return Scaffold(\n body: Column(children: [\n ElevatedButton(\n onPressed: () => Navigator.pop(context, 'kurir'),\n child: const Text('Kirim ke alamat'),\n ),\n ElevatedButton(\n onPressed: () => Navigator.pop(context, 'ambil'),\n child: const Text('Ambil di toko'),\n ),\n ]),\n );\n }\n}\n\n// Di layar keranjang:\nFuture _pilih(BuildContext context) async {\n final metode = await Navigator.push(\n context,\n MaterialPageRoute(builder: (context) => const PilihPengiriman()),\n );\n print('Metode: $metode');\n}",{"_29":136,"_31":137,"_33":138,"_35":139,"_37":89,"_39":40,"_41":140,"_43":141,"_49":146,"_54":-7,"_55":-7},"flt-l4-s1","flt-l4","Future, async, dan await","/belajar/flutter-dasar/future-async-await","Apa urutan baris yang dicetak program ini?",[142,143,144,145],"A, B Rina, lalu C","C, A, lalu B Rina","A, C, lalu B Rina","A lalu C saja; B Rina tidak pernah tercetak karena main tidak menunggu sapa.",{"_49":147,"_52":69},"Future ambilNama() =>\n Future.delayed(const Duration(seconds: 1), () => 'Rina');\n\nFuture sapa() async {\n print('A');\n final nama = await ambilNama();\n print('B $nama');\n}\n\nvoid main() {\n sapa();\n print('C');\n}",{"_29":149,"_31":150,"_33":151,"_35":152,"_37":126,"_39":40,"_41":153,"_43":154,"_49":-7,"_54":-7,"_55":-7},"flt-l13-s1","flt-l13","Formulir dan validasi","/belajar/flutter-dasar/formulir-dan-validasi","Kolom nomor HP wajib diisi dan minimal 10 digit. Validator mana yang benar?",[155,156,157,158],"validator: (v) => (v == null || v.length < 10) ? 'Nomor minimal 10 digit' : null,","validator: (v) => v != null && v.length >= 10,","validator: (v) => (v == null || v.length < 10) ? null : 'Nomor minimal 10 digit',","validator: (v) => (v == null || v.length < 10) ? 'Nomor minimal 10 digit' : '',",{"_29":160,"_31":137,"_33":138,"_35":139,"_37":89,"_39":40,"_41":76,"_43":161,"_49":166,"_54":-7,"_55":-7},"flt-l4-s3",[162,163,164,165],"7, Galat: kode kosong, lalu selesai","7, Galat: kode kosong, stok kedua terbaca, lalu selesai","7 lalu selesai, karena galat dari fungsi async tidak bisa ditangkap try-catch","Galat: kode kosong lalu selesai, karena galat membatalkan semua print di blok try",{"_49":167,"_52":69},"Future cekStok(String kode) async {\n if (kode.isEmpty) throw FormatException('kode kosong');\n return 7;\n}\n\nFuture main() async {\n try {\n print(await cekStok('K01'));\n print(await cekStok(''));\n print('stok kedua terbaca');\n } on FormatException catch (e) {\n print('Galat: ${e.message}');\n } finally {\n print('selesai');\n }\n}",{"_29":169,"_31":32,"_33":34,"_35":36,"_37":38,"_39":40,"_41":170,"_43":171,"_49":176,"_54":-7,"_55":-7},"flt-l9-s4","Lencana Aktif harus menimpa sudut kanan bawah foto. Susunan mana yang tepat untuk foto beserta lencananya?",[172,173,174,175],"Stack(children: [Foto(), Positioned(right: 0, bottom: 0, child: Lencana())])","Stack(children: [Positioned(right: 0, bottom: 0, child: Lencana()), Foto()])","Row(children: [Foto(), Positioned(right: 0, bottom: 0, child: Lencana())])","Column(children: [Foto(), Lencana()])",{"_49":51,"_52":53},{"_29":178,"_31":86,"_33":87,"_35":88,"_37":89,"_39":40,"_41":179,"_43":180,"_49":185,"_54":-7,"_55":-7},"flt-l5-s3","Apa yang dicetak program struk ini?",[181,182,183,184],"57000","49500","5700","51300",{"_49":186,"_52":69},"class Item {\n final String nama;\n final int harga;\n final int qty;\n\n const Item(this.nama, this.harga, {this.qty = 1});\n\n int get subtotal => harga * qty;\n}\n\nclass Struk {\n final List item;\n final int diskonPersen;\n\n Struk(this.item, {this.diskonPersen = 0});\n\n int get total {\n var jumlah = 0;\n for (final i in item) {\n jumlah += i.subtotal;\n }\n return jumlah - jumlah * diskonPersen ~/ 100;\n }\n}\n\nvoid main() {\n final s = Struk([\n const Item('Gudeg', 20000, qty: 2),\n const Item('Es teh', 5000, qty: 3),\n const Item('Kerupuk', 2000),\n ], diskonPersen: 10);\n print(s.total);\n}",{"_29":188,"_31":86,"_33":87,"_35":88,"_37":89,"_39":40,"_41":189,"_43":190,"_49":195,"_54":-7,"_55":-7},"flt-l5-s1","Potongan ini ditolak analyzer. Baris print mana yang menggantikannya sehingga program mencetak - bila catatan bernilai null, dan catatan berhuruf kapital bila ada?",[191,192,193,194],"print(catatan!.toUpperCase());","print((catatan ?? '-').toUpperCase());","print(catatan?.toUpperCase());","print(catatan.toString().toUpperCase());",{"_49":196,"_52":69},"void main() {\n final pesanan = {'menu': 'Gudeg', 'catatan': null};\n String? catatan = pesanan['catatan'];\n print(catatan.toUpperCase());\n}",{"_29":198,"_31":199,"_33":200,"_35":201,"_37":38,"_39":40,"_41":202,"_43":203,"_49":-7,"_54":-7,"_55":-7},"flt-l6-s2","flt-l6","Pohon widget: StatelessWidget dan StatefulWidget","/belajar/flutter-dasar/pohon-widget-stateless-stateful","Aplikasi kasir punya empat widget buatan sendiri. Mana yang perlu menjadi StatefulWidget?",[204,205,206,207],"LabelHarga, yang menampilkan harga kiriman induknya dan ikut berganti saat induk mengirim harga baru.","TombolTambah, yang hanya meneruskan ketukan ke fungsi milik induknya.","PemilihJumlah, yang menyimpan angkanya sendiri dan menambahnya setiap tombol plus di dalamnya diketuk.","LogoToko, yang menampilkan gambar dengan warna yang mengikuti tema aplikasi dari context.",{"_29":209,"_31":210,"_33":211,"_35":212,"_37":75,"_39":40,"_41":213,"_43":214,"_49":219,"_54":-7,"_55":-7},"flt-l16-s3","flt-l16","FutureBuilder: memuat, berhasil, dan galat","/belajar/flutter-dasar/futurebuilder","Server membalas 404, dan ambilProduk mengembalikan null. Apa yang tampil?",[215,216,217,218],"Teks null, karena snapshot.data bernilai null.","Teks berisi kode 404 dari server.","Layar galat, karena operator ! dipakai pada data yang null.","Penanda memuat terus berputar, karena hasData dan hasError sama-sama false.",{"_49":220,"_52":69},"Future ambilProduk(int id) async {\n final respons = await http.get(Uri.parse('https://api.toko.example/produk/$id'));\n if (respons.statusCode == 200) {\n return Produk.fromJson(jsonDecode(respons.body) as Map);\n }\n return null;\n}\n\n// di build:\nFutureBuilder(\n future: _produk, // dibuat di initState dengan ambilProduk(99)\n builder: (context, snapshot) {\n if (snapshot.hasData) {\n return Text(snapshot.data!.nama);\n } else if (snapshot.hasError) {\n return Text('${snapshot.error}');\n }\n return const CircularProgressIndicator();\n },\n)","actionData","errors"]