I'm CaLendarW Blog

呢期研究既 delegation, 其中一個例子係 Lambda 在 List.Sort 既使用.

List<Person> persons = new List<Person>();

// sort by name
persons.Sort((a,b) => a.Name.CompareTo(b.Name));

// sort by age
persons.Sort((a,b) => a.Age.CompareTo(b.Age));

bool ascending = false;

// descending by age
persons.Sort((a,b) => a.Age.CompareTo(b.Age) * (ascending ? 1 : -1));

有了這樣既 syntax, 寫 sorting 易左同快捷左很多~~