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Re: Global variable is deletable?

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On Monday, January 7, 2013 6:24:10 PM UTC+8, Stefan Weiss wrote:
> On 2013-01-07 10:21, Thomas Li wrote:
> 
> > Hi, I'm fresh in Javascript. From the book "Javascript, the
> 
> > definitive guide", the global variable should be nondeletable,
> 
> > however when I test it in IE, it is deletable, anything wrong? 
> 
> > Steps:
> 
> > 1. Open IE 9
> 
> > 2. Press F12 and select Console panel
> 
> > 3. Var temp = 1;
> 
> >    delete temp;
> 
> > 4. it returns true and when I enter temp, it says "temp is undefined"
> 
> 
> 
> When you enter something in the console, it gets evaluated with eval().
> 
> Variables created from eval()ed code don't have the DontDelete flag set.
> 
> 
> 
> Details:
> 
> http://perfectionkills.com/understanding-delete/#firebug_confusion
> 
> 
> 
> 
> 
> - stefan

Great thanks and the reference is very helpful

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Global variable is deletable? Thomas Li <cooooooder@gmail.com> - 2013-01-07 01:21 -0800
  Re: Global variable is deletable? Stefan Weiss <krewecherl@gmail.com> - 2013-01-07 11:24 +0100
    Re: Global variable is deletable? JJ <jaejunks@nah.meh> - 2013-01-07 15:36 +0000
      Re: Global variable is deletable? Scott Sauyet <scott.sauyet@gmail.com> - 2013-01-07 07:50 -0800
    Re: Global variable is deletable? Thomas Li <cooooooder@gmail.com> - 2013-01-07 22:08 -0800
  Re: Global variable is deletable? dann90038@gmail.com - 2013-01-07 13:25 -0800
    Re: Global variable is deletable? Thomas Li <cooooooder@gmail.com> - 2013-01-07 21:48 -0800

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