Convert methods to unselfish functions

unselfish.js

Function.prototype.unselfish = (function(Fp, Ap) {
    var applyMethod = Fp.apply,
        callMethod = Fp.call;

    var apply = callMethod.bind(applyMethod),
        call = callMethod.bind(callMethod);

    var sliceMethod = Ap.slice;

    return function unselfish() {
        var f = this;
        return function(self) {
            return apply(f, self, call(sliceMethod, arguments, 1));
        };
    };
})(Function.prototype, Array.prototype);

var hasOwn = Object.prototype.hasOwnProperty.unselfish();

console.log(hasOwn({}, "toString")); // false
console.log(hasOwn({foo:1}, "foo")); // true

I get it, thanks for clarification, good tip.