Here's a "one liner" solution:

perl -naF, -e "$t += $F[1]; eof and print $t;" siteperf.txt

[download]

If you wrote that out "the long way", here's how it would look: 

while ( <> ) {
    @F = split ',';
    $t += $F[1];
    eof and print $t;
}
# Usage: perl mytally.pl siteperf.txt

[download]

Within the one-liner, the -n flag is responsible for creating a while( <> ) {.... loop. The -a flag is responsible for creating a @F = split ','; statement. And because the -n loop wraps a loop around all the code, a test must be conducted to spot the end of the file, and print the resulting tally only on the last loop iteration.

Can anyone golf the one liner down to fewer keystrokes than this? 

perl -naF, -e"$t+=$F[1];eof&&die$t" test.txt

[download]

(44, including filename. Choosing a shorter filename doesn't count.)


Dave

In reply to Re: Simple Totals Example (Help Needed) by davido
in thread Simple Totals Example (Help Needed) by doctormaze

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.