Question

我有一组字符串："Apple", "Mange", "Pineapple"

我想得到长度最长的单词的索引。例如，2对应于最长的单词"Pineapple"。

Answer 1

要获得名称最长的水果，请执行以下操作：

var fruits = new List<String> { "Apple", "Mange", "Pineapple" };
var longestName = (from fruit in fruits
                   orderby fruit.Length descending
                   select fruit).First();
var index = fruits.IndexOf(longestName);

作为一个lambda，没有特别的原因：

var fruits = new List<String> { "Apple", "Mange", "Pineapple" };
var longestName = fruits.OrderByDescending(e => e.Length).First();
var index = fruits.IndexOf(longestName);

Answer 2

以下内容也可以起作用：

var maxItem = fruits
    .Select((fruit, index) => new { Length = fruit.Length, Index = index })
    .Aggregate((max, next) => (next.Length > max.Length) ? next : max);
var maxIndex = maxItem.Index;

从集合中获取索引值

2 个答案: