使用隐式类型的局部变量 [英] Using implicitly typed local variables

问题描述

我刚刚安装的 ReSharper的试用版和的第一件事我注意到的是它总是暗示与隐式类型的人，如更换显式类型的局部变量：

I just installed a trial version of ReSharper and one of the first things I noticed is that it always suggests to replace explicitly typed local variables with implicitly typed ones, e.g:

public string SomeMethod(int aParam)
{
    int aNumber = SomeOtherMethod(aParam);
    // should be changed to:
    var aNumber = SomeOtherMethod(aParam);
}

我想显式类型的变量是更具可读性（更明确）。

I think explicitly typed variables are more readable (more explicit).

你觉得什么ReSharper的的建议？是否有使用隐式类型变量什么优势？当你使用隐式/露骨瓦尔？

What do you think about ReSharper's suggestion? Is there any advantage in using implicitly typed variables? When do you use implicit/explict vars?

推荐答案

我个人只用无功的时候，我可以清楚地分辨变量类型刚刚看完声明，例如：

I personally only use "var" when I can clearly distinguish the variable Type by just reading the declaration, for example:

var someVariable = new List<int>();

在上面的例子中，其明显的是，变种是指列表与所述; INT>中。

In the example above, its evident that "var" refers to "List<int>".

我不喜欢用VAR当我必须去一些方法定义，找出哪些变量类型VAR代表或不必依赖于视觉studio软件Intelli-弹出或任何被调用，例如这也不行对我说：

I don’t like to use "var" when I have to go to some method definition to find out what variable type "var" represents or by having to rely on visual studio intelli-popup or whatever that is called, for example this in not ok to me:

var someVaraible = SomeMethod();

我的意思是，什么是的someMethod功能应该返回？你可以通过查看代码行告诉？不，你不能，所以这就是为什么我避免使用无功在这些情况下。

I mean, what is the "SomeMethod" function supposed to return? Can you tell just by looking at the line of code? No you can’t, so that is why I avoid using "var" on those situations.

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