danger,
This looks potentially really cool and I would like to incorporate this technique as one of the possible options of my module. The problem is I can't seem to get DB_BTREE->{compare} to do anything meaningful. I get the same result no matter what I make the sort routine.

#!/usr/bin/perl -w
use strict;
use DB_File;

tie my %h, 'DB_File', undef, O_RDWR|O_CREAT, 0666, $DB_BTREE
   or die "DB_File tie failed: $!";

#$DB_BTREE->{compare} = sub { $h{$_[1]} <=> $h{$_[0]} };
#$DB_BTREE->{compare} = sub { $h{$_[0]} <=> $h{$_[1]} };
#$DB_BTREE->{compare} = sub { $_[0] cmp $_[1] };
#$DB_BTREE->{compare} = sub { $_[1] cmp $_[0] };


%h = (
    'John'   => 33,
    'Jacob'  => 29,
    'Jingle' => 15,
    'Heimer' => 48,
    'Smitz'  => 12,
);
print "$_ : $h{$_}\n" for keys %h;
[download]

What am I missing? - L~R

---

---

• Are you posting in the right place? Check out Where do I post X? to know for sure.
• Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:

  <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>

• Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
• Want more info? How to link or How to display code and escape characters are good places to start.