There are other ways.

0. Making a hash out (my previous post)

1. Loop through the elements and check for the value you are looking for and return the index. This is O(n) and very inefficient if you want to get the index quite frequently and if your array is big

2. You had a,b,c etc. as elements then to find g then you can do something like binary search. This assumes your list/array is ordered.

3. Come up with your own data structure.

All these things are related to your original question but if you post your original problem then someone might be able to suggest you a better way to do it. Maybe there is a solution that does not require an index


In reply to Re^3: How to find the index of an element in an array? by sk
in thread How to find the index of an element in an array? by knsridhar

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.