Re^3: IO::Handles ... any good?

perl
-i    # edit in place
.bak  # rename original file by appending .bak to filename; print to n
+ew file with original name 
-p    # use a while loop to read each file; print each line (is stored
+ in $_) which you have read (and modified)
e     # excecute code from command line
'     # start of code to be executed (for the default while loop)
$_    # default variable, each line of file
.=    # append the following to yourself ($_) and assign it to you 
"\n"  # string to be appended
'     # end of code
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$_ .= "\n"; is the shorter form of $_ = $_ . "\n";

Check perlrun and look for the explanation for option -i. They have some examples there. -p should be explained in more details, too.

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Re^4: IO::Handles ... any good? by ikegami (Patriarch) on Mar 23, 2009 at 02:25 UTC
`-p` should be explained in more details, too. `-p` is nicely explained using Deparse. `>perl -MO=Deparse -pe"body()" LINE: while (defined($_ = <ARGV>)) { body(); } continue { die "-p destination: $!\n" unless print $_; } -e syntax OK` [download]	[reply] [d/l] [select]