On May 30, 2012, at 2:18 PM, Mark S. Miller wrote:
>
> However, there might be some utility (at least for debugging) in having a
> Function.prototype.isThisBound method. It would return true for arrow
> functions and functions created via Function.prototype.bind
>
> I agree that such a predicate would be useful, but the useful predicate
> should also give "true" for functions that don't mention "this". Thus,
> "isThisBound" may not be the right name. What it really means is 'Can this
> function sense the "this" binding with which it is called?" If we call it
> "canSenseThis", then clearly we should also reverse the truth value.
I don't understand what this predicate is supposed to test for. What does it
return for
function f(x, y) {
if (false) {
console.log(this.foo);
}
return x * y;
}
Can isBound be used to implement Function.prototype.halts? ;-P
Dave
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