Flutter/dart/基本文法

if

int maxId = 0
if (maxId > 1) {
}
if (maxId != null) {
}

foreach

List<String> names = new List<String>();
names.add("hoge");
for (String name in names) {
     print(name);
});

foreachその2

List<String> names = new List<String>();
names.add("hoge");
names.forEach((item) {
     print(item);
});

クラス生成

class ArticleDao {
  void add(Article article) {
  }
}
ArticleDao dao = new ArticleDao();
dao.add(article);

配列件数

List<String> names = new List<String>();
print(names.length);

ハッシュ

Map<String, int> map = new Map<String, int>();
map['hoge'] = 1;
map['piyo'] = 2;