Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
you could pass a 200 line script like this - though you might find it a pain to write all on one line.
So, write it on multiple lines. -e may be repeated:
$ perl -wl -e 'print "This is line 1";' \ -e 'print "This is line 2";' \ -e 'print "This is line 3";' \ -e 'print "This is line 4";' \ -e 'print "This is line 5";'
works like a charm.
-p (looping plus)

in longhand it looks like this:

while(<>) { print ; }
Actually, it's a bit more subtle than that, as can be shown by using the deparser:
$ perl -MO=Deparse -pe '1' LINE: while (defined($_ = <ARGV>)) { '???'; } continue { print $_; } -e syntax OK
The print is done in a continue block, so it will print even if you use next in the supplied code. Note also the label.
-a (split)

in longhand:

split;
Well, that should be: @F = split;, but it should be noteworthy that -a only works in combination with -n or -t.
perl -01512 -e
This is what I get when I run it:
$ perl -01512 -e 1 Unrecognized switch: -2 (-h will show valid options). $
You can only use -0 to set $/ to a one character string - not to set it to \r\n.

Abigail


In reply to Re: Uncommon* but Useful Perl Command Line Options by Abigail-II
in thread Uncommon* but Useful Perl Command Line Options for One-liners by Sol-Invictus

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others avoiding work at the Monastery: (4)
As of 2022-05-23 07:57 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Do you prefer to work remotely?



    Results (81 votes). Check out past polls.

    Notices?