Given that AnomalousMonk's response above doesn't answer your question, I think I get you now. What you're trying to achieve, actually, is this: you have a situation, in which you have these set of strings:
my $superstring = "123abc.def.ghi";
my $substring = "abc.def.ghi";
my $prefix = "123";
And what you want to do is to see whether $substring appears in $superstring, but only if it's preceded by $prefix?
Like this?
#### (pfff where is my head at. This won't work of course) $superstrin
+g =~ m/$B$A/
$superstring =~ m/$prefix$superstring/;
If that's not it, then you'll have to explain what you mean with 'prefix' in this
context.
Edit:Caught a stupid brainfail in the regex code. Fixed.
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