Forum Discussion
Rory_Hewitt_139
Nimbostratus
NimbostratusDetermining 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...
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 $d" 10 1 0 1by the way, if flag is only one digit each, can we use split?
% split [string map {"-" ""} 10--01-00---01] {} 1 0 0 1 0 0 0 1
nitass_89166
Noctilucent
Noctilucentthat kinda works, except that the characters could potentially be 0, 1 or -
may we remove - before scanning?
% scan [string map {"-" ""} 10--01-00---01] %2d%2d%2d%2d a b c d
4
% put "$a $b $c $d"
10 1 0 1
by the way, if flag is only one digit each, can we use split?
% split [string map {"-" ""} 10--01-00---01] {}
1 0 0 1 0 0 0 1
Rory_Hewitt_139Nimbostratus
NimbostratusNope, we need the '-' in there - it implies 'null'.
Although, of course, split would work fine -I don't know why I didn't think of it - probably because I'm not a Tcl programmer :)
In any event, I have this working - using substr:
for {set x 0} {$x < 8} {incr x} {
set flag [string index $flags $x]
switch $flag {
"0" {...}
"1" {...}
default {...}
}
which seems to do the job rather nicely.
Thanks for the help!