[SR-Users] Modifying $pU

[Daniel-Constantin Mierla]

On 9/22/10 12:49 AM, Alex Balashov wrote:
> On 09/21/2010 04:47 PM, dotnetdub wrote:
>
>> I also looked at using re.subst on $pU but can't get it to work.
>>
>> What is the best way to achieve what I'm trying to do?
>
> I would extract a substring based on length.  Intermediate (first) 
> variable 'pu_len' is required because transformations cannot be nested:
>
>    $var(pu_len) = $(pU{s.len}) - 1;
>    $var(new_pi) = $(pU{s.substr,1,$var(pu_len)});
while this is correct, you can do it without computing the length:
$var(new_pi) = $(pU{s.substr,1,0});

- meaning is that when len param for transformation is 0, get substring 
from position param till the end of pv value.

Cheers,
Daniel

>    append_hf("Remote-Party_ID: ...$var(new_pi)...");
>

-- 
Daniel-Constantin Mierla
http://www.asipto.com