This runs a recursive function and assigns the result of the recursions to a variable without leaking the function in global scope.

recursiveAssignment.js

var foo = (function me(x) {
    if (x < 10) {
        return me(x + 1);
    }
    else {
        return x;
    }
}(1));

// In this case foo will be equal to 10.
// Calling me(1) will throw a reference error when called outside the function "me".