Hi, I'm trying to do the pattern match and extract the contents based on the back references on a file handler. But this doesn't seem to be working.Can someone explain me why the printing of file handler when used like print <FH> works & not the extraction part as i explained previously? Also suggest how this can be done in a single line of code instead of looping it in the while condition

open my $a,"<file";
print <$a>;# prints the file contents as expected 
print $1 if <$a> =~ m/(error.*)/; # Nothing printed though the files h
+as the line containing error key word.
my @b=<$a>;grep {$_ =~ /error/}  @b;# This does the trick and wonderin
+g why the above line doesn't work
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