... & Associates, Inc.
101 Morris Street
Sebastopol, CA 95 472
800-998-9938 (in the U.S. or Canada)
70 7-829-0515 (international/local)
70 7-829-0104 (FAX)
You can also send us messages electronically. ... Modules
351
9. Strings 353
Perl Builtins
354
String-Matching Algorithms
3 57
Phonetic Algorithms
388
Stemming and Inflection
389
Parsing
394
Compression
411
10. Geometric Algorit...
... sorting is, how to do it efficiently using Perl& apos;s own sort
function, what comparing actually means, and how you can code your own sort algorithms with
Perl.
An Introduction to Sorting
Sorting ... flag in the bit. We are notcontinue
Page 79
going to play such games in Perl; the bit-twiddling that such an approach requires is too
expensive to do with an interpreter.
The oldest...
... follows:break
@scores = qw(40 53 77 49 78 20 89 35 68 55 52 71 );
print percentile(\@scores, 90), "\n";
Page 145
This will be:
77
Beating O (N log N)
All the sort algorithms so far have been ... half, 294 ,77 8, were partial
positions (the game was not yet complete). Less than half, 209,088, were wins for one player
or the other. Only a relative few, 46,080, were draw positio...
... from (85, 40) to ( 376 , 142),
and overlay it beginning at (79 , 0) with ins(). The result is shown in Figure 7- 13.
There's no way to combine two Math::MatrixReal matrices without explicitly ... $bullseye using the technique we've
already seen. The result is shown in Figure 7- 7.break
Page 254
Figure 7- 7.
The clipped bullseye
Now we're ready to add the images. Adding alw...
... O ( | E | !) possibilities, which grows extremely quickly. In many
algorithms one can pick any edge to follow, but in some algorithms it does matter in which
order the adjacent vertices are traversed. ... graphs using a simple text-based format. Edges (and unconnected vertices)
are listed separated with with commas. A directed edge is a dash, and an undirected edge is a
double-dash. (Ac...
... exhaustive search.
Encrypted Perl Code
You can get Perl to execute code that has been encrypted! (No, not the perverse sort of Perl
code that resembles line noise.) For Perl 5, you use the Filter ... ability to filter Perl source code before it
is parsed by the Perl interpreter. This filtering can be used for many purposes:
• macro expansion with cpp, m4, etc.
• decompression w...
... it. To correlate
web hits with store sales, you look at the number of hits and sales total every month for five
months:break
Page 622
@hits = (2 378 , 4024, 9696, 73 14, 77 10);
@sales = (310.94, 315.88, ... we get
54.995296 376 0691 + 2.0 170 1164212454x. That is, our best estimate of the relation between
sales and hits is that sales = 2.0 170 1164212454 × the number of hits + 54. 995296...