Mastering Algorithms with Perl phần 7 ppsx

... 1234.5 678 . We'll start off with %d: printf "%d", 1234.5 678 ; # prints "1234" printf "%2d", 1234.5 678 ; # prints "1234" printf "%6d", 1234.5 678 ; ... "%.2f", 1234.5 678 ; # prints "1234. 57& quot; printf "%.3f", 1234.5 678 ; # prints "1234.568" printf "%.4f", 1234.5 678 ; # prints "1...

Ngày tải lên: 12/08/2014, 21:20

... % 83559 67) + 66 * (256**3 % 83559 67) + 67 * (256**2 % 83559 67) + 68 * 256 + 69 == 65 * 1 671 2192 + 66 * 65282 + 67 * 65536 + 68 * 256 + 69 == == 377 804 We may check the final result ... 1 47, 483, 6 47. The reason for using 2, 1 47, 483, 6 47, 2 31 - 1, instead of 4,294,9 67, 295, 2 32 - 1, will be explained shortly. The prime we are looking for is 8,355,9 67. (For more .....

Ngày tải lên: 12/08/2014, 21:20

... & 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...

Ngày tải lên: 12/08/2014, 21:20

... 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...

Ngày tải lên: 12/08/2014, 21:20

... 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...

Ngày tải lên: 12/08/2014, 21:20

... 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...

Ngày tải lên: 12/08/2014, 21:20

... 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...

Ngày tải lên: 12/08/2014, 21:20

... 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...

Ngày tải lên: 12/08/2014, 21:20

... 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...

Ngày tải lên: 12/08/2014, 21:20

... Paul, 1 17, 170 , 423, 562 match heuristic, 373 matching strings (see regular expressions) Math modules Math: :BigFloat module, 477 -480 Math: :BigInt module, 363, 477 -480 random BigInts, 579 -581 Math: ... at least one, 571 birthday conundrum, 570 conditional probability, 589-590 cryptography and, 526 density functions, 575 algorithms for (list), 592-598 distributions, 566, 574 - 576...

Ngày tải lên: 12/08/2014, 21:20