That should be...

$index = &List::BinarySearch::binsearch(
  sub {$a <=> $b},
  300,
  \@num_array,
);

[download]

The difference from your original suggestion is that one should pass the array by reference.

Q: Why would the crazy author want the array parameter to be passed by reference? Doesn't he know this can be inconvenient? :) A: Because passing a list is an O(n) operation, whereas passing a reference is O(1). We wouldn't want the passing of parameters to have an order of growth that is worse than the order of growth of the underlying algorithm.

Of course you already know this, but it's worth mentioning in general.


Dave

In reply to Re^2: List::BinarySearch and conditional tests with Test::More by davido
in thread List::BinarySearch and conditional tests with Test::More by glasswalk3r

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.