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Re: Uncommon* but Useful Perl Command Line Options (for one-liners)

by ysth (Canon)
on Jan 29, 2004 at 00:49 UTC ( #324846=note: print w/replies, xml ) Need Help??


in reply to Uncommon* but Useful Perl Command Line Options for One-liners

'-l' has a dual nature - on input it behaves like chomp(), automatically removing newline characters, while on output, as we've seen, it becomes the anti-chomp, adding newlines.
This needs more explication. -l's effect on input and output are not as parallel as this would imply.

-l's effect on input only applies to the LINE loop generated by -n or -p (by adding a chomp at the beginning). If -n and -p aren't specified, no input is changed.

-l's effect on output applies to all print (but not printf) statements, however situate (by virtue of setting $\).

Update: said $/ meant $\.

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