Good points. I wonder if it wouldn't be best to do it all in awk. Saves CPU
cycles and complexity, IMHO.
Cheers,
Boris.
On Tue, Sep 13, 2016 at 12:26 PM, Gordon Messmer <gordon.mess...@gmail.com>
wrote:
> On 09/12/2016 04:37 PM, bruce wrote:
>
>> awk -F': ' '{print $2}' | tail -1 | sed 's/.*storeId=\(.*\).&/\1/'
>>
>
>
> You've got good answers, especially Cameron's. It had one error, though.
> If the URL is in a variable, it needs to be an argument to printf:
>
> url='http://venturacollege.bncollege.com/webapp/wcs/stores/
> servlet/BNCBHomePage?storeId=78236&campusId=78236&userId=-
> 1002&catalogId=10001&ddkey=http:BNCBMultiCampusPageCmd'
> store_id=$( printf '%s\n' | tr '?&' '\012\012' | sed -n 's/^storeId=//p' )
>
> The reason I like Cameron's advice in particular is that it doesn't use
> ".*". In this case, performance isn't measurably bad, but using ".*" can
> eat a lot of CPU cycles.
>
> https://blog.mariusschulz.com/2014/06/03/why-using-in-regula
> r-expressions-is-almost-never-what-you-actually-want
>
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