in reply to What this pattern matches
$b='This_is_Sample_Text'; if ($b=~/^(.+)_[^_]+$/) { print "\n$1"; ## This_is_Sample }
. = Match any character (except newline)
+ = Match 1 or more times
.+_ = Match upto last underscore(_)
[^_]+$ = Notmatch underscore(_) upto end of the string
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Seekers of Perl Wisdom