在执行调用函数之前执行代码 [英] Execute code before the called function is executed

问题描述

我希望能够以某种方式标记功能（也许属性？），这样，当它从任何地方叫，其他的一些代码获取处理参数和返回值，而不是所谓的功能，也可以让功能正常执行。

I would like to be able to mark a function somehow (attributes maybe?) so that when it's called from anywhere, some other code gets to process the parameters and return a value instead of the called function, or can let the function execute normally.

我会用它来轻松缓存。

例如，如果我有一个函数调用ADD10，它是这样的：

For example, if I had a function called Add10 and it would look like this:

int Add10 (int n)
{
    return n + 10;
}

如果该函数去使用相同的值反复调用（ADD10（7））它总是会产生相同的结果（17），所以它是没有意义的重新计算每一次。当然，我不会与功能那么简单，因为这做，但我相信你能明白我的意思。

If the function go called repeatedly with the same value (Add10(7)) it would always give the same result (17) so it makes no sense to recalculate every time. Naturally, I wouldn't do it with functions as simple as this but I'm sure you can understand what I mean.

请问C＃提供做着什么办法我想？
我需要一种方法来标记为缓存，这样，当有人做ADD10（16）一些代码某处遇到第一个在字典来检查的，我们已经知道16 ADD10价值和回报，如果我们做一个功能，计算，存储，如果我们不回。

Does C# provide any way of doing what I want? I need a way to mark a function as cached so that when someone does Add10(16) some code somewhere is ran first to check in a dictionary is we already know the Add10 value of 16 and return it if we do, calculate, store and return if we don't.

推荐答案

您想memoize的功能。这里有一种方法：

You want to memoize the function. Here's one way:

的 http://blogs.msdn.com/b/wesdyer/archive/2007/01/26/function-memoization.aspx

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