hi all,

there are two maps used in this example, one for 'options', one for 
'output'. My question is, why is that in the script, the brackets [] works 
for 'output', but not for 'options'?

For example, if change the line:
options.verbose  ===> options[verbose]
it returns error: verbose is not defined

However, 'output[request.host]' is perfectly fine.

The two maps are installed with the same code, the wrap/unwrap are the 
same, what's the difference?

I guess my confusion is what exactly does bracket mean here? Does it invoke 
the named property interceptor?

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