Comments on: Setters using VBS and constant hacks http://www.thespanner.co.uk/2010/07/30/setters-using-vbs-and-constant-hacks/ Javascript blog with messed up syntax inside Thu, 26 Jan 2012 01:38:34 +0000 hourly 1 By: Maciej Łebkowski http://www.thespanner.co.uk/2010/07/30/setters-using-vbs-and-constant-hacks/#comment-1793 Maciej Łebkowski Mon, 02 Aug 2010 05:53:50 +0000 http://www.thespanner.co.uk/?p=659#comment-1793 I knew the value of global scope `x` without testing. The `undefined-inner-x` part got me a little bit confused, I would guess it would equal `3` before running. So I got just the first part right blindfolded :) I’m @puck, but I’m not really into twitter, so its quite silent there :D I knew the value of global scope `x` without testing. The `undefined-inner-x` part got me a little bit confused, I would guess it would equal `3` before running.
So I got just the first part right blindfolded :)

I’m @puck, but I’m not really into twitter, so its quite silent there :D

]]> By: Gareth Heyes http://www.thespanner.co.uk/2010/07/30/setters-using-vbs-and-constant-hacks/#comment-1792 Gareth Heyes Sat, 31 Jul 2010 01:02:39 +0000 http://www.thespanner.co.uk/?p=659#comment-1792 I hope you didn't test it first, if so hello mr js hax0r :) if you have a twitter account I'd be interested ;) I hope you didn’t test it first, if so hello mr js hax0r :) if you have a twitter account I’d be interested ;)

]]> By: Maciej Łebkowski http://www.thespanner.co.uk/2010/07/30/setters-using-vbs-and-constant-hacks/#comment-1791 Maciej Łebkowski Fri, 30 Jul 2010 18:25:35 +0000 http://www.thespanner.co.uk/?p=659#comment-1791 Well, `const` works just like `var` in this example. It defines a local variable (and it’s evaluated at the very start of the function/scope, before any other statements). The assignment would be done in the line the statement is located, but `return` terminates it early. It alerts `undefined`, because at that point, `x` is already initialized (as a constant), but not yet have a value. The assignment statement fails silently… because `x` is a constant, cannot be assigned to (changing `const` to `var` would change this behavior). And of course `x` is a local variable of `y()`, so global-scope `x` remains unchanged and equals `1`. Nice. ;-D Well, `const` works just like `var` in this example. It defines a local variable (and it’s evaluated at the very start of the function/scope, before any other statements). The assignment would be done in the line the statement is located, but `return` terminates it early.
It alerts `undefined`, because at that point, `x` is already initialized (as a constant), but not yet have a value. The assignment statement fails silently… because `x` is a constant, cannot be assigned to (changing `const` to `var` would change this behavior).
And of course `x` is a local variable of `y()`, so global-scope `x` remains unchanged and equals `1`.

Nice. ;-D

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