A raw list in alphabetic order is probably fine. They can use the find function on their browser to locate things from there. However, if you -really- want a list that you can jump around in by letter:
use strict;
use warnings;
my (@names, $f, %names);
chomp (@names = <DATA>);
for (@names) {
$f = substr($_, 0, 1);
push @{$names{$f}}, $_;
}
print join ', ', map { "<a href=\"#$_\">$_</a>" } sort keys %names;
print "<p>\n\n";
for (sort keys %names) {
print "<a name=\"$_\"></a><b>$_</b>\n<ul>";
print join "\n", map { "<li>$_" } sort @{$names{$_}};
print "</ul><p>\n\n";
}
__DATA__
Alvin
Clarissa
Kappa
Bob
Bubba
Zim
There's probably a CSS way to make it so just pressing a key on the keyboard jumps to that letter, but I'm not going to complicate things.
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