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void main() { | |
// e.g. 画面のドロップダウンリストで選択された区分名から対応する区分オブジェクトを探す | |
final selectedFeeTypeName = 'adult'; | |
final fee = Fee.values.byName(selectedFeeTypeName); | |
print(fee); | |
assert(fee.yen.value == Yen(100).value); | |
assert(Fee.adult.compareTo(Fee.child) == 50); | |
final charge = Charge(fee); |
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void main() { | |
// e.g. 画面のドロップダウンリストで選択された区分名から対応する区分オブジェクトを探す | |
final selectedFeeTypeName = 'adult'; | |
final fee = FeeFactory.feeByName(selectedFeeTypeName); | |
print(fee); | |
assert(fee.yen().value == Yen(100).value); | |
} | |
/// 円の値オブジェクト |
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import 'package:flutter/material.dart'; | |
void main() => runApp(MyApp()); | |
class MyApp extends StatefulWidget { | |
@override | |
_MyAppState createState() => _MyAppState(); | |
} | |
class _MyAppState extends State<MyApp> { |