Lambda expressions and how to combine them?

Question

How can I combine two lambda expressions into one using an OR ?

I have tried the following but merging them requires me to pass parameters into the Expressio

Answer 1

** edit: oops read over the OR thing, updated it ***

Hi,

Not sure if you just want to call them seperatley or you want to combine them from an academic point of view.

You can just call them like this:

bool OR(int i1, Func f1, Func f2){
    return f1(i1) || f2(i1);
}

That will do the trick.

or you can rewrite that as

bool MyOR = (i1, f1, f2) => f1(i1) || f2(i1);

And when you're qurious, create an expression from that and look at that. (doing this by hand, don;t have VS here now, so please be easy on my typos)

Expression, Func, bool>> exprOR = 
(i1, f1, f2) => f1(i1) || f2(i1); 

If you want to look at the anatomy of the expression, you can look at this article i wrote: http://www.codeproject.com/KB/WPF/WpfExpressionTree.aspx

Just pass the expression to the apadater and see how it;s built up.

Regards Gert-Jan