LINQ vs Lambda vs匿名方法vs代表 [英] LINQ vs Lambda vs Anonymous Methods vs Delegates
问题描述
-
任何人都可以解释什么是LINQ，Lambda，匿名方法，代表意味着什么？
Can anyone explain what are the LINQ, Lambda, Anonymous Methods, Delegates meant?
这3个如何相互不同？
How these 3 are different for each other?
是否可替换另一个？
当Google Googling
I didn't get any concrete answer when i did Googling
推荐答案
LINQ是一个广泛的技术名称，涵盖了大量的.NET 3.5和C＃3.0更改; 查询语言和吨更多。
LINQ is a broad technology name covering a large chunk of .NET 3.5 and the C# 3.0 changes; "query in the language" and tons more.
代理可以与功能指针相媲美;一个方法句柄作为一个对象，如果你喜欢，即
A delegate is comparable to a function-pointer; a "method handle" as an object, if you like, i.e.
Func<int,int,int> add = (a,b) => a+b;
是一种写一个委托的方式，然后我可以打电话。代表也支持事件和其他回调方式。
is a way of writing a delegate that I can then call. Delegates also underpin eventing and other callback approaches.
匿名方法是创建委托实例的2.0简短方法，例如：
Anonymous methods are the 2.0 short-hand for creating delegate instances, for example:
someObj.SomeEvent += delegate {
DoSomething();
};
他们还通过捕获的变量（未显示在上面）中引入了完整的关闭语言。 C＃3.0引入了lambdas，其中可以产生与匿名方法相同的方法：
they also introduced full closures into the language via "captured variables" (not shown above). C# 3.0 introduces lambdas, which can produce the same as anonymous methods:
someObj.SomeEvent += (s,a) => DoSomething();
但可以将还编译为表达式树，以完整LINQ对（例如）数据库。例如，您不能运行针对SQL Server的代理！但是：
but which can also be compiled into expression trees for full LINQ against (for example) a database. You can't run a delegate against SQL Server, for example! but:
IQueryable<MyData> source = ...
var filtered = source.Where(row => row.Name == "fred");
可以将转换成SQL，因为它被编译成表达式树（ System.Linq.Expression ）。
can be translated into SQL, as it is compiled into an expression tree (System.Linq.Expression).
所以：
- 可以使用匿名方法创建一个委托
- 一个lambda可能与anon-method相同，但不一定
- an anonymous method can be used to create a delegate
- a lambda might be the same as an anon-method, but not necessarily
这篇关于LINQ vs Lambda vs匿名方法vs代表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
