Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

I am attempting to build a Perl statement which I want to run as a command, storing it in a variable as I go. The reason I want to do this is that I am dealing with arrays of varying sizes, and I can't think of a way to structure the command such that it will work with any size of array. So I am building a customized version of this command in the script each time it runs so that it will fit the size of any array it encounters, storing the command in my variable, and then attempting to route it to the interpreter. But with no luck.

I seem to remember when I first learned Perl years ago that there are ways to send variables to the interpreter as commands just as you can to the system using backtick-style quotes. Can anyone help?


PS here is a sample output of the command for anyone who is curious:

" @{$array[0]}, @{$array[1]}, @{$array[2]}, @{$array[3]}" =~ / (\S+) . +*?,.*? (\S+) .*?,.*? (\S+) .*?,.*? (\S+) (?{ push @res,"$1-$2-$3-$4"; + })(?!)/; print join ', ',@res;
PS I am escaping items as necessary, so that's not the problem.

PPS This is based on code I found elsewhere on the forum:

In reply to sending a scalar to the interpreter as a command by silentq

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

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others studying the Monastery: (8)
    As of 2018-06-20 16:09 GMT
    Find Nodes?
      Voting Booth?
      Should cpanminus be part of the standard Perl release?

      Results (116 votes). Check out past polls.