let：

String[] strs = { "A penny saved is a penny earned.","The early bird catches the worm.","The pen is mightier than the sword." };var result = from s in strs //s是數組strs中的一個元素let word = s.Split(' ') //word是s句子中的單詞數組from a in word //a是word單詞數組中的一個單詞let w = a.ToLower() //w是a單詞的小寫where w[0] == 't'select word;foreach (var r in result){var words = r.ToArray();foreach (var w in words){Console.Write(w + "||");}Console.WriteLine();Console.WriteLine("=======================");}

?

2.concat:

?連接數組

var result = list.Select(q => q.Name).Concat(dogs.Select(o => o.Name));ap.ShowArray(result.ToArray());

注意必須都是同一類型的，例如上面就是字符串類型

連接對象數組

var result = list.Where(q => q.ID < 4);var result2 = list.Where(q => q.ID > 7);var result3 = result.Concat(result2);ap.Show(result3.ToList());

有相同數據的情況

var result = list.Where(q => q.ID < 8);var result2 = list.Where(q => q.ID > 4);var result3 = result.Concat(result2);ap.Show(result3.ToList());

?

?

轉載于:https://www.cnblogs.com/hongdada/p/3171752.html

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