/// For a normal method call, a function's `this` is the value to the
/// left of the dot.  For a call to `call` or `apply`, it's the first
/// argument to `call` or `apply`.
var obj = {f: function() { logArguments(this, arguments); }};// there are equivalent too:
obj.f(1, 2, 3);
obj.f.call(obj, 1, 2, 3);
obj.f.apply(obj, [1, 2, 3]);