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Hi All, I am trying to use a regexp to search on the string “SSS”. If this string is found in a particular segment, then capture all characters which come BEFORE the “SSS” and save them to a variable.
The issue is the fact that the regexp does not search on “SSS”, but rather just “S”. So, if a capital S appears anywhere before the “SSS”, all of the logic is blown for the rest of the script.
The string I am testing with is:
General SisterSSS001ABC123 InformationIf the regexp works correctly, the appropriate output would be “Sister” to the caputuring variable.
I have tried the following options and have not gotten the desired result:
A. regexp {(^[SSS]*)}
A1. Output: S
B. regexp {(^(SSS)*)}
B1. Output:
C. regexp {([^”SSS”]*)}
C1. Output:
I have tried a few other variations, but in all cases, the regexp continues to focus on the first instance of “S” and not the “SSS”.
Does anyone know the syntax to isolate a string of the same letters using regexp?Or, am I wasting my time? Thanks,
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Unless you just want to practice unraveling all of the secret handshakes of regexp, you could do this:
hcitcl>set junk “General SisterSSS001ABC123 Information”
General SisterSSS001ABC123 Information
hcitcl>set first [string first “SSS” $junk]
14
hcitcl>set stuff [string range $junk 0 [expr $first – 1]]
General Sister
The expr is because the index from the string first points to the first S of the SSS.
email: jim.kosloskey@jim-kosloskey.com 29+ years Cloverleaf, 59 years IT - old fart.
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What if the string is changed to: “SisterSSS001ABC123 Information” or what if there are 2 or three words before Sister? I would rather do a two step operation. Also I beleive the requirement was to capture only if the SSS were there
set x “General SisterSSS001ABC123 Information”
if {[regexp — {^(.*?)SSS.*?} $x {} tst]} [
set val [lindex $tst end]
} else {
set val “”
}
Never trust anyone with a last name like Archambault! 😀
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Hi Charlie,
The code worked! Two follow up questions if you don’t mind:
1. At the end of the regexp, you use $variable {} variable
What is the {} used for?
2. Earlier in this post, Keith McLeod used $variable –> tst (via command line example).
When I ran the code with –> in the command line, it returned the correct result. When I ran the code in the Testing Tool via TPS test, it did not work.
A. What does –> do?
B. Is there a way to get it to work within Cloverleaf?
Thanks again for your help,
Derek
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Both the {} and -> in Kieth’s case do basically the same thing.
In the regexp command the first variable, {} or -> in this case, hold the whole string that matched while subsequent variables hold the value of the contents ofthe parenthesis starting from let to right.
In my case I sent the entire match to an empty string (bit bucket). In Kieth’s case he stored it to a meaningless value named ->. You may sometimes see this a “match” or other names. It depends on whther you need it or not. We did not.
I hope this helps
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