C# 如何将 List<String> 转换为 Dictionary<int,String>
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How to convert List<String> to Dictionary<int,String>
提问by testCoder
I have List<String>, i need to convert it to Dictionary<int,String>with auto generation of Key, is any shortest way to accomplish that? I have tried:
我有List<String>，我需要将它转换为Dictionary<int,String>自动生成密钥，有什么最短的方法可以实现吗？我试过了：
var dictionary = new Dictionary<int, String>();
int index = 0;
list.ForEach(x=>{
definitions.Add(index, x);
index++;
});
but i think it is dirty way.
但我认为这是肮脏的方式。
采纳答案by L.B
var dict = list.Select((s, i) => new { s, i }).ToDictionary(x => x.i, x => x.s);
回答by Kirill Polishchuk
Use:
用：
var dict = list.Select((x, i) => new {x, i})
.ToDictionary(a => a.i, a => a.x);
回答by Eren Ers?nmez
In my opinion, what you have is more readable than the Linq way (and as a bonus, it happens to be more efficient):
在我看来，你所拥有的比 Linq 方式更具可读性（而且作为奖励，它碰巧更有效）：
foreach(var item in list)
dictionary[index++] = item;
回答by Johan Sonesson
I find this to be the neatest
我发现这是最整洁的
int index = 0;
var dictionary = myList.ToDictionary(item => index++);
