Linq和Lambda表达式 [英] Linq and lambda expression

问题描述

LINQ和Lambda表达式之间有什么区别?使用lambda代替linq查询有什么好处?

What is the difference between LINQ and Lambda Expressions? Are there any advantages to using lambda instead of linq queries?

推荐答案

Linq是语言集成查询.使用linq时，通常会使用一个小的匿名函数作为参数.那个小的匿名函数是lambda表达式.

Linq is language integrated query. When using linq, a small anonymous function is often used as a parameter. That small anonymous function is a lambda expression.

var q = someList.Where(a => a > 7);

在上面的查询中，a => a > 7是一个lambda表达式.等效于编写一个小的实用程序方法并将其传递给Where:

In the above query a => a > 7 is a lambda expression. It's the equivalent of writing a small utility method and passing that to Where:

bool smallMethod(int value)
{
  return value > 7;
}

// Inside another function:
var q = someList.Where(smallMethod);

这意味着您的问题确实无法回答. Linq和lambda是不可互换的，而lambda是实现linq的技术之一.

This means that your question is really not possible to answer. Linq and lambdas are not interchangeable, rather lambdas are one of the technologies used to implement linq.

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