On Apr 24, 2012, at 1:28 PM, Brendan Eich wrote: > Douglas Crockford wrote: >> On 4/23/2012 6:41 PM, Mark S. Miller wrote: >>> On Mon, Apr 23, 2012 at 6:30 PM, Allen Wirfs-Brock >>> <[email protected] <mailto:[email protected]>> wrote: >>> >>> >>> The point is that much of what is done on the web is not high >>> integrity computation. It is essential that high integrity be >>> possible, when it is required. But forcing all computation into the >>> high integrity category seems like as bad an idea as forcing all >>> computation to be low integrity. I really wonder how successful JS >>> would have been if it had started out as a high integrity language. >>> >>> Yes, I think that's a good point. >> >> No, that is not a good point. The strange ascendance of JS can best be >> described as miraculous. It succeed despite its low integrity, not because >> of it. >> >> Our problem is not to figure out how to make this language popular. We have >> somehow already managed that through amazing luck. > > http://www.imdb.com/title/tt0076759/quotes?qt=qt0440727 > >> I think our problem now is to disarm the array of toeguns while minimizing >> breakage as much as possible, and to avoid installing new toeguns. I think a >> focus on high integrity gives us a useful discipline. > > Of course we'll never know, but I've argued something I *do* know: I made JS > mutable by default (all objects, almost all properties safe > constructor.prototype and perhaps some DOM ones) in 1995 because I knew > developers would have to monkey-patch it right away. I was counting on that > non-miracle to help save it.
Back to the original point, which was that making strict mode delete throw when applied to a non-configurable property is not significantly higher integrity than the non-strict behavior of returning false when a property can not be deleted. http://www.flickr.com/photos/steffmac/5733303422/lightbox/ Anton reported that this delete throw was one of the two strict mode features that caused him some difficult in switching to string mode. I suggested that we might consider removing the delete throw behavior from strict mode. No body has comment on that specific idea. Allen
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