IDE support?

John J Barton johnjbarton at
Fri Sep 16 07:51:23 PDT 2011

On Fri, Sep 16, 2011 at 7:04 AM, Brendan Eich <brendan at> wrote:
> On Sep 16, 2011, at 1:55 AM, Andreas Rossberg wrote:
>> Being able to detect when a condition is violated is not equivalent to
>> knowing that it always holds.
> Yes, this is the point I mangled in that "dynamic is necessary [in JS] ... and gives strictly more information (and more relevant information!)" sentence. I should have written "static+dynamic gives strictly more information."
> Sorry about that -- not a profound point, but something that came out in the exchange John J. Barton and I had about static program analysis not being enough. It's not enough, but it can do a lot with dynamic analysis in partnership.

I'll also revise:
Dimitris Vardoulakis's work on CFA2, the algorithm behind doctorjs,
demonstrates that my claims about static analysis being a dead end are
wrong. In fact it provides further evidence that innovation in tools
can help dynamic languages keep their core advantages while overcoming
some of their challenges.


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