The map to exactly recreate the effects of your foreach loop would be something like this:

my %ClipNames = map { (split/,/)[0, 1] } @clips;

[download]

but that doesn't produce what you ask for - the keys and values are the wrong way round. If what you ask for above is what you really want, then you'd need to change round the elements in the array slice like this:

my %ClipNames = map { (split/,/)[1, 0] } @clips;

[download]

The reason that you're seeing thevalue 13 is that you're using $. after you've read the whole data file, so $. is set to the number of lines in the file (i.e. the line number of the last line).

You can, of course, combine most of your processing into one line once you've worked out which map you want to use - like this:

my %ClipNames = map { (split/,/)[0, 1] }
                grep /^[0-9]+,[A-Z]:/ } <DATA>;

[download]
--
<http://www.dave.org.uk>

European Perl Conference - Sept 22/24 2000, ICA, London
<http://www.yapc.org/Europe/>

In reply to Re: Data to hash via map problem by davorg
in thread Data to hash via map problem by dmtelf

Title:
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, details, 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, summary, 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.