Beginning Perl Third Edition PHẦN 8 pdf

... Exercises 1. Using Person8.pm, write a program to do the following: Create three different Person8 objects. Print the number of Person8 objects. Loop through the Person8 objects and print a ... (methods). Perl makes object–oriented programming neat and simple: • An object is a reference that has been blessed into a class. • A class is an ordinary Perl package. • A method is an...

Ngày tải lên: 09/08/2014, 14:21

... it through Perl. You should see something like this: $ perl currency1.pl 495 18 Yen is 547.462 686 567164 dollars 360 Yen is 3. 980 099502 487 56 dollars 30510 Yen is 337.31343 283 582 1 dollars ... undefined: #!/usr/bin /perl # defined.pl CHAPTER 2 ■ SCALARS 48 my $times = 8; print "This is the $timesth time.\n"; This is syntactically incorrect, because...

Ngày tải lên: 09/08/2014, 14:21

... 73 else and else if 77 Comparing Strings 78 The switch Statement 79 Looping — The for and while Statements 84 The for Loop 84 The for in Loop 87 The while Loop 88 The do while loop 90 The break and ... per-copy fee to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (9 78) 750 -84 00, fax (9 78) 646 -86 00. Requests to the Publisher for permission should be addr...

Ngày tải lên: 09/08/2014, 14:21

... setDate(15 + 28) . In the third line you set the date to the current date, plus 28 days. You stored the current day of the month in currentDay, so now you just add 28 to that to move 28 days ahead. If ... date is the January 15 and you use setDate( 28) , it’s not 28 days from the fifteenth of January, but 28 days from the first of January. What you want is 28 days from the current d...

Ngày tải lên: 09/08/2014, 14:21

... Window fraMainfraMenu fraBottomfraTop Top window fraMenufraBottom fraTop fraMain 2 48 Chapter 7: Windows and Frames 10_051511 ch07.qxp 4/13/07 6:17 PM Page 2 48 Next, you create a new Option object by passing the text ... UpperWindow.htm. The final page is very similar to it: 2 38 Chapter 7: Windows and Frames 10_051511 ch07.qxp 4/13/07 6:17 PM Page 2 38 09_051511 ch06.qxp 4/13/07 6:20 P...

Ngày tải lên: 09/08/2014, 14:21

... elements. XML requires properly nested elements; they cannot overlap as they can in HTML. For example, the fol- lowing XML document is not well formed: <?xml version=”1.0” encoding=”iso -88 59-1”?> <myDogs> <name>Morgan</name> <name>Molly </myDogs></name> This ... enable a web site’s content to be displayed on myriad devices. 5 68 Chapter 14: JavaScr...

Ngày tải lên: 09/08/2014, 14:21

... Joins 377 Perl, DBI, and CGI 3 78 What We Didn’t Talk About 385 Summary 386 Exercises 386 ■Appendix: Exercise Solutions 387 C H A P T E R 1 ■ ■ ■ 1 First Steps in Perl Every ... Exercises 79 ■Chapter 4: Lists and Arrays 81 Lists 81 Simple Lists 82 More Complex Lists 83 Creating Lists Easily with qw// 84 Accessing List Values 87 Arrays 91 Assigning Arrays 91...

Ngày tải lên: 09/08/2014, 14:21

... There’s no difference at all between any of these three lists: (3, 8, 5, 15) ((3, 8) , (5, 15)) (3, (8, 5), 15) Similarly, Perl sees each of these lists exactly the same as the others: ('one', ... wrong prefix, Perl will complain with a warning. #!/usr/bin /perl # badprefix.pl use warnings; use strict; my @array = (1, 3, 5, 7, 9); print @array[1]; w...

Ngày tải lên: 09/08/2014, 14:21

... SUBROUTINES/FUNCTIONS 134 Now, we’re starting to look like a real utility: $ perl hello2.pl -v Beginning Perl& apos;s "Hello, world." version 2.0 Hello, world. $ The first ... printed with its new value—20, as we can see: $ perl global2.pl before: 10 in change_global(): 20 after: 20 $ CHAPTER 4 ■ LISTS AND ARRAYS 1 08 Why? There are four elements...

Ngày tải lên: 09/08/2014, 14:21

... $passwd2\n"; $ perl join.pl Login name : kake User ID : 100 18 Home directory : /home/kake Original password : kake:x:100 18: 10020::/home/kake:/bin/bash New password : kake#x#100 18# 10020##/home/kake#/bin/bash ... wrong: ^ goes at the beginning, $ goes at the end. A dollar sign anywhere else in the string makes Perl try to interpolate a variable. CHAPTER 8 ■ FILES A...

Ngày tải lên: 09/08/2014, 14:21