Best way to check for an element in an array?

[Taylor Hillegeist via Digitalmars-d-learn]

So I find myself Doing this kind of thing very frequently. I have 
a Array of Somethings and i want to see if "something specific" 
is inside the array. I wrote a template for it. but is this the 
best way to do this kind of thing. I feel like it doesn't help 
with readability. Is there a better way? Maybe i missed something 
in the std library.

import std.stdio;

template FNDR(T){
     bool isIn(T Element, T[] Array){
         bool rtn=false;
         foreach(T ArrayElement; Array){
             if(Element==ArrayElement){
                 rtn=true;
             }
         }
     return rtn;
     }
}

void main(string[] args)
{
     int[3] stuff=[0,1,2];
     if (FNDR!int.isIn(2,stuff))
     {
         writeln("Hello World!");
     }
}


Is there a way maybe to make it look like this?

import std.stdio;

template FNDR(T){
     bool contains(T[] Array,T Element){
         bool rtn=false;
         foreach(T ArrayElement; Array){
             if(Element==ArrayElement){
                 rtn=true;
             }
         }
     return rtn;
     }
}

void main(string[] args)
{
     int[3] stuff=[0,1,2];
     if (stuff.contains(2)) // Much clean! 
stuff.FNDR!int.contains(2) doesn't work
     {
         writeln("Hello World!");
     }
}

I'm interested in what you guys think? what is the cleanest way 
to do this?