What they said.

But also, you're using commas in your C-style loop, where the correct delimiter is semi-colons. Without semi-colons, it's being interpreted as some non-C-ish for-loop, where you want to run three commands in sequence: $i, $i<@$val, and $i++, ( the first two presumably for side-effects) and use the value of the third.

I haven't used a C-ish loop in years ... not relevant in Perl. If you DO want to increment over the indices, the simplest way is using the range operator:

for my $index ( 0 .. @{$val} -1 ) {
   do_stuff()
}

[download]

But mostly for loops are for iterating over arrays or lists, possibly the keys from hashes

As Occam said: Entia non sunt multiplicanda praeter necessitatem.

In reply to Re: get value of hash hold by array and array hold by another hash by TomDLux
in thread get value of hash hold by array and array hold by another hash by tart

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.