oenix framework offers, let us start with an example. We want to find the first odd number in an STL container.</p>
<p>
1)  Normally we use a functor or a function pointer and pass that in to STL's find_if generic function (sample1.cpp):</p>
<p>
Write a function:</p>
<code><pre>
    <span class=keyword>bool
    </span><span class=identifier>is_odd</span><span class=special>(</span><span class=keyword>int </span><span class=identifier>arg1</span><span class=special>)
    {
        </span><span class=keyword>