Generator issue: exceptions while initializing arguments

[Dmitry Soshnikov]

On Mon, Sep 10, 2012 at 5:55 PM, Dmitry Soshnikov <
dmitry.soshnikov at gmail.com> wrote:

>
> But not this one:
>
> var FOO = 42;
> function bar(x, y = FOO + y) { var y = 10; } // Error .. ?
>
>
Typo, mean if there is no such parameter, but only the local var:

var FOO = 42;
function bar(x, y = FOO + z) { var z = 10; } // Error .. ?

P.S.: Though, it still seems that the parent-only scope fits better since
avoids complexities. Otherwise, we'll get yet another interesting quiz
questions like this one:

var x = 10;

(function foo() {
  console.log(x); // undefined?
  var x = 20;
})();

(which is funny, though). Similar will come for this outer FOO and inner
FOO in different run-time circumstances, i.e. unpredictable behavior --
first the outer FOO exists, then it's removed, and at the second call it
resolves already to the inner frame. This will definitely be banned as a
bad practice (having FOO inside and outside), so to avoid this -- outer
only scope is more preferable.

Dmitry
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