Help needed for regexp 1

[sbts1]

Please help to resolve a problem related to regular expression and matching everything except "&&".

I have the following script

set bw tu12-1-1-1-3&tu12-1-2-1&&-3&tu12-1-3-1&tu12-1-7-2&&-3
regexp {([^&&]*)} $bw match
puts $match -> the output is "tu12-1-1-1-3"
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I wanted to match everything excluding the first &&, so the result should have been "tu12-1-1-1-3&tu12-1-2-1", instead I am getting "tu12-1-1-1-3"

Please help.

Thanks
Sbts1

 

[esjo]

If you would to solve your problem with a single regular expression try:
regexp {^(.*?)&&} $bw dummy match

Easier to understand is the following two-line-version:
regexp -indices {&&} $bw indx
set match [ string range $bw 0 [ expr [ lindex $indx 0 ] - 1 ] ]

good luck !

 

[sbts1]

Thanks esjo, I tried your code and it is working.
The first one in fact generated the string including the &&., but the second one worked fine.

Thanks again
sbts1

 

[esjo]

In the first solution you should use the value of "$match" and not that of "$dummy" ;-)

esjo