The ranges are given in biological coordinates, meaning the first coordinate is 1 (0 is illegal) and max_length is a legal coordinate. So, if max_length=10 then our coordinates are in 1..10 (both inclusive). Also note that a range like [2,4] expands to2,3,4 since both start and end are inclusive.

This convention always causes some trouble, and most of the time I use to convert the coordinates at the beginning and at the end so I can work with 0-based coordinates. In this case I didn't since it's quite simple, so I'm working with biological coordinates.

Anyway, if we now take your example and arbitrarily replace all 0's with 1's we get: 

my @ranges = ([ 1, 5 ], [ 1, 6 ], [ 2, 7 ], [ 3, 8 ], [ 4, 9 ], [ 5,  
+10 ],[ 5, 1 ], [ 6, 1 ], [ 7, 2 ], [ 8, 3 ], [ 9, 4 ], [ 10, 5 ],);
my $rm = RangeMap->new( 10, \@ranges );

[download]

Now, [1,3] returns 5; since only the first two and last three ranges contain it.

[1,4] returns 4; since only the first two and last two ranges contain it.

I hope it makes sense now

In reply to Re^2: Serializing a large object by daverave
in thread Serializing a large object by daverave

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.