Forum Discussion

Nimbostratus

Jun 04, 2014

Determining processing based on flags in a URL

I have a URL which will come in as /features?features=10010001 where each '1' or '0' is a 'flag'. I need to check each flag in turn and depending on its value, XOR it with a matching flag s...

application delivery

devops

iRules

nitass_89166
Jun 04, 2014
that kinda works, except that the characters could potentially be 0, 1 or -

may we remove - before scanning?

% scan [string map {"-" ""} 10--01-00---01] %2d%2d%2d%2d a b c d 4 % put "$a $b $c $d" 10 1 0 1

by the way, if flag is only one digit each, can we use split?

% split [string map {"-" ""} 10--01-00---01] {} 1 0 0 1 0 0 0 1

nitass_89166

Noctilucent

what about scan or regexp?

 scan

% scan 10010001 %2d%2d%2d%2d a b c d
4

% put "$a $b $c $d"
10 1 0 1

% time "scan 10010001 %2d%2d%2d%2d a b c d" 1000
5.319 microseconds per iteration

 regexp

% regexp {(\d\d)(\d\d)(\d\d)(\d\d)} 10010001 m a b c d
1

% put "$a $b $c $d"
10 01 00 01

% time "regexp {(\d\d)(\d\d)(\d\d)(\d\d)} 10010001 m a b c d" 1000
3.077 microseconds per iteration