On Jun 19, 2008, at 11:20 PM, Brendan Eich wrote: > On Jun 19, 2008, at 8:40 PM, Mark S. Miller wrote: > >>> Try putting this in a Firefox address toolbar: >>> >>> javascript:alert('foo' in window); var foo = 42; alert(delete foo); >>> alert(foo) >>> >>> You will get true (because the var binding -- not initialization >>> -- is >>> hoisted to the top of the program, right after the javascript:), >>> false >>> (because var makes a DontDelete binding outside of eval), and 42. >> >> I did. Thanks for suggesting that experiment. But given the above >> behavior, I don't understand >> >> javascript:alert('foo' in window); var foo = 42; window.foo = 43; >> alert(delete window.foo); alert(window.foo) >> >> I get true, true, undefined. > > Works correctly (true, false, 43) in Firefox 3 (try it, you'll like > it!).
Also works correctly in Safari 3.1 and the Safari 4 Developer Preview (which implements split window support). Regards, Maciej _______________________________________________ Es4-discuss mailing list Es4-discuss@mozilla.org https://mail.mozilla.org/listinfo/es4-discuss