What do you think about this structure? 
my $transaction_record_fields = {
  'Batch_Agency'         =>  { COL => 0, POS => [  1 ..   3] },
  'Batch_Date'           =>  { COL => 1, POS => [  4 ..  11] },
  'Batch_Type'           =>  { COL => 2, POS => [ 12 ..  12] },
};

[download]

Eventually, I'll be inserting some data into each column, so it will end up looking like this:

my $transaction_record_fields = {
  'Batch_Agency'         =>  { COL => 0, POS => [  1 ..   3], VALUE =>
+ "AAA" },
  'Batch_Date'           =>  { COL => 1, POS => [  4 ..  11], VALUE =>
+ "BBBBBBBB"},
  'Batch_Type'           =>  { COL => 2, POS => [ 12 ..  12], VALUE =>
+ "C"},
};

[download]

I like the idea of being able to insert by fieldname rather than by a numeric index, and this structure supports that.

OTOH, that fact that I have to hard-code the column index seems a little funky to me.



In reply to Re^4: Accessing an array of anonymous hashes by thezip
in thread Accessing an array of anonymous hashes by thezip

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.