Thank you. I just post my new understanding a few seconds earlier. Hope that's right. :)
> On Apr 17, 2015, at 11:28 PM, Andreas Rossberg <[email protected]> wrote: > > On 17 April 2015 at 17:18, Glen Huang <[email protected] > <mailto:[email protected]>> wrote: > Not sure about others, but i assume the condition part and statement part in > a control construct live in the same scope. > > That's why you can do `for (let a = 1; a < 2; a++) a;`. And `if (let a = 1) > a;` maybe in es7? > > Why that's not the case for "do while"? Is my mental model wrong? > > Yes. :) > > for (let x ...) scopes over the body naturally. In your example, you expect > to scope an inner declaration (one even inside a block) to scope to the > outside. That is something else entirely, and makes no sense to me. > > /Andreas > > > > On Apr 17, 2015, at 11:10 PM, Caitlin Potter <[email protected] > > <mailto:[email protected]>> wrote: > > > > Is there a language where lexically scoped variables declared in a block > > are accessible outside of that block? Java, C, C#, rust, Python, etc, will > > not let you do this. I’m not sure this is a gotcha for most software > > developers > > > >> On Apr 17, 2015, at 10:57 AM, Glen Huang <[email protected] > >> <mailto:[email protected]>> wrote: > >> > >> ```js > >> do { > >> let a = 1; > >> } while (a); > >> ``` > >> is "a" undefined in the while condition? This seems like a gotcha. > >> > >> > >> _______________________________________________ > >> es-discuss mailing list > >> [email protected] <mailto:[email protected]> > >> https://mail.mozilla.org/listinfo/es-discuss > >> <https://mail.mozilla.org/listinfo/es-discuss> > > > > _______________________________________________ > es-discuss mailing list > [email protected] <mailto:[email protected]> > https://mail.mozilla.org/listinfo/es-discuss > <https://mail.mozilla.org/listinfo/es-discuss>
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