Thanks for all the replies. The examples all work and I even understand them (after a bit of reading). However, I'm seeing some weirdness in my actual application. The c_speed variable is being used in a Tk widget as follows: 

my $cs_e1   = $seg1_f->Entry(-textvariable => \$c_speed[0], -width => 
+4,
                                                -validate => 'all',
                                                -vcmd  => \&validate_s
+peed,
                                                -font => $med_font)->g
+rid(
                                                -row => 0, -column => 
+1,
                                                -sticky => "w");

sub validate_speed{
  my $val = shift;
  $val ||= 0;
  #get alphas and punctuation out
  if( $val !~ /^\d+$/ ){ return 0 }
  if (($val >= 0) and ($val <= 10)) {return 1}
    else{ return 0 }
}

[download]

When I use split I can print c_speed to the terminal and the values are there, the same as when I use my sscanf lines

  $rstring  = <$lfh>;
  ($c_speed[0], $c_speed[1], $c_speed[2], $c_speed[3]) = sscanf("%d %d
+ %d %d", $rstring);

[download]

BUT, the Tk Entry widget only sees the new values when using sscanf. When I use split the variable still retains it's old value. I'm assuming this is some widget weirdness - can anyone explain please?

In reply to Re^2: Reading into array with sscanf by colintu
in thread Reading into array with sscanf by colintu

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.