Teach Yourself Perl 5 in 21 DaysTeach Yourself Perl 5 in 21 Days, Second Edition is the ideal book for beginning - and intermediate - level users who want to gain a solid understanding of this programming language. Using step-by-step tutorials and the easy-to-follow approach, you can Teach yourself Perl 5 in 21 Days! Through various teaching elements, you'll learn everything you need to know about this popular programming language. You'll discover how to manipulate text, generate reports, and perform system tasks. Through practical, hands-on instructions, logically organized lessons, and helpful Q & A sections, you'll master Perl functions and concepts and be developing robust programs in no time. Plus, Do/Don't boxes show you how to avoid potential programming pitfalls, illustrations explain constructs such as associative arrays, and tables serve as handy references. |
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Contents
Week at a Glance | 1 |
Basic Operators and Control Flow | 21 |
Understanding Scalar Values | 51 |
Copyright | |
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arguments ARGV array element array slice array variable assignment operator associative array bitwise BUG BUSTER character string child process chop command line conditional expression conditional statements contains converted count count++ create curdir debugger default defined digits enables error evaluated example executed exponent file variable file1 file2 filename floating-point number following statement foreach header hexadecimal input line inputline integer library function line of input loop machine MYFILE newline character nonzero notation NOTE null string octal operand option OUTFILE package parentheses pattern matches Perl interpreter Perl program pointer print format printf quiz reference result retrieve retval round-off error scalar value scalar variable socket specified standard input file standard output standard output file statement block STDIN STDOUT subarray subroutine subscript substring syntax system variable tells the Perl TYPE Listing UNIX user ID usr/local/bin/perl value stored var1 var2 variable name waitpid words Write a program zero