说我有这样的数组
string [] fruits = {"watermelon","apple","kiwi","pear","banana"};
fruits.FindAllIndex("apple");
将返回1和2的数组
如果没有,我该如何实施呢？
谢谢！
解决方法
一种方法是这样写：
var indices = fruits
.Select ((f,i) => new {f,i})
.Where (x => x.f == "apple")
.Select (x => x.i);
或传统方式：
var indices = new List<int>();
for (int i = 0; i < fruits.Length; i++)
if(fruits[i] == "apple")
indices.Add(i);
