Contains wrapper method as proposed by JS Drip #28 http://us6.campaign-archive2.com/?u=2cc20705b76fa66ab84a6634f&id=6b53e9c756&e=9d9db64a8f

js-contains-function.js

function aContainsB (a, b) {
    return a.indexOf(b) >= 0;
}

var philosophers = "Aquinas, Maimonedes, and Avicenna";
var me = "Joshua";

function printPhilosopherStatus (person) {
    if (aContainsB(philosophers, person)) {
        console.log(person + " is a philosopher.");
    } else {
        console.log(person + " is NOT a philosopher.");
    }
}

// Outputs: "Joshua is NOT a philosopher."
printPhilosopherStatus(me);