the thing is i am not allowed to use maps in this program only array

To be clear, in some programming languages, there's a data structure called a "Map". Java is one such language. It stores a mapping from one set of data (the keys) to another set of data (the values). Perhaps domain names to IP addresses:

  (
    "foo.example.com" => "10.0.0.1",
    "bar.example.com" => "10.0.0.2",
    "baz.example.com" => "10.0.0.3",
  )

[download]

Perl doesn't have a native map datatype. For some purposes, Perl hashes can be used. But if the keys can't be reduced to strings, Perl hashes become trickier. (Tied hashes and fieldhashes can work around this limitation to an extent.)

The Perl map keyword doesn't have anything to do with Map data structures though. It operates on lists. (And an array is basically just a way of storing a list in a variable.)

Anything you do with map and grep, you can do with plain old loops, but map and grep are often clearer ways to express yourself.

A way to think of it might be: can you speak/write using only one-syllable words?

toby döt ink

In reply to Re^3: Finding sum of numbers and storing it an Array by tobyink
in thread Finding sum of numbers and storing it an Array by shabird

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.