From an algorithm analysis perspective, avoiding a second pass is a relatively minor optimization. Your algorithm is O(n) with the second pass, and it's still O(n) with the optimization. Unless the performance is so bad that users are timing it with a clock, they won't notice the difference.
If the performance is so bad that users are timing it with a clock, you should probably think about O(log n) possibilities (such as running a binary search against a sorted index) or, depending on the nature of your data, maybe replacing the flat-file implementation with a DBMS.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
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:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||