Re^3: regex not matching special char

in reply to Re^2: regex not matching special char
in thread regex not matching special char

In addition to looking at the documentation linked by kennethk (and also at perlretut; see in particular the section titled 'Looking ahead and looking behind'), perhaps some insight as to the effect of the \b (and \B) zero-width word (and non-word) boundary assertions can be gained by split-ting one of the OPed example strings on each assertion:

>perl -wMstrict -le
"my $line2 = 'I:\$AVG\hello.log';
 printf qq{'$_'  } for split /\b/, $line2;
 print qq{\n};
 printf qq{'$_'  } for split /\B/, $line2;
"
'I'  ':\$'  'AVG'  '\'  'hello'  '.'  'log'

'I:'  '\'  '$A'  'V'  'G\h'  'e'  'l'  'l'  'o.l'  'o'  'g'
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