Yep, right, though, in ES3 anyway standard practice was/is to check own
properties. And in ES5 you may control enumerable attribute. Besides, I
added the line with restoring the constructor only by the habit; in fact
I do not use there this check and it's not needed there, so I wouldn't
care about it ;)
Dmitry.
On 21.08.2011 0:35, Xavier MONTILLET wrote:
Never thought assigning a new object as prototype was taking that away...
But then when you use for in loops, it is shown whereas it shouldn't...
On Sat, Aug 20, 2011 at 8:10 PM, Dmitry A. Soshnikov
<dmitry.soshni...@gmail.com> wrote:
On 20.08.2011 7:42, Xavier MONTILLET wrote:
What's the aim of line 69?
https://github.com/DmitrySoshnikov/Essentials-of-interpretation/blob/master/src/lesson-2.js
To restore `constructor` property since we override it when assign to
`prototype`.
var F = function() {};
var f = new F;
console.log(f.constructor == F); // true
// but then
F.prototype = {x: 10};
console.log(f.constructor == F); // false
Details:
http://dmitrysoshnikov.com/ecmascript/chapter-7-2-oop-ecmascript-implementation/
Dmitry.
On Thu, Aug 11, 2011 at 1:46 PM, Dmitry A. Soshnikov
<dmitry.soshni...@gmail.com> wrote:
Then next step in implementing a small language:
"Essentials of interpretation" Lesson 2. Parsing. Lexer of AE in math
infix
notation.
https://github.com/DmitrySoshnikov/Essentials-of-interpretation/blob/master/src/lesson-2.js
Dmitry.
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