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Dù bằng cách nào, giá trị của biểu thức đánh giá trở thành giá trị của toàn bộ biểu thức. 4.5.11.3 Comma điều hành Trong một bối cảnh danh sách, "," danh sách đối số phân cách và chèn cả [Chương 4] 4,5 Các nhà khai thác | Chapter 8 8.15 B Disassembler PERL IN A NUTSHELL SEARCH 41 PREVIOUS Chapter 8 Standard Modules NEXT 8.15 B Disassembler Disassembles Perl bytecode. PREVIOUS 8.14 B Deparse KOMI BOOK INDEX HEXT 8.16 B Lint Library Home Perl in a Nutshell Learning Perl Learning Perl on Win32 Programming Perl Advanced Perl Programming Perl Cookbook http www.crypto.nc1uw1aoi420d85w1sos.de documents oreilly perl perlnut ch08_15.htm 2 7 2001 10 31 09 PM Chapter 8 8.16 B Lint IN A NUTSHELL 41 PREVIOUS Chapter 8 Standard Modules NEXT 8.16 B Lint Provides program checking for Perl programs equivalent to running Perl with the -w option. Named after the Unix lint program for checking C programs. Invoked as perl -MO Lint options program program is the name of the Perl program to be checked. The options are separated by commas and follow normal backend option conventions. Most of the options are lint-check options where each option is a word specifying one lint check. Preceding an option with no- turns off that option. Options specified later override earlier options. There is also one non-lint-check option -u. Here is the list of available options all Turns all warnings on. context Warns whenever an array is used in implicit scalar context. dollar-underscore Warns whenever _ is explicitly used anywhere or whenever it is used as the implicit argument of a print statement. implicit-read Warns whenever an operation implicitly reads a Perl special variable. implicit-write Warns whenever an operation implicitly writes to a Perl special variable. none Turns off all warnings. private-names Warns whenever any variable subroutine or method name lives in a non-current package but begins with an underscore _ doesn t warn about an underscore as a single-character name e.g. _. http www.crypto.nc1uw1aoi420d85w1sos.de documents oreilly perl perlnut ch08_16.htm 1 of 2 2 7 2001 10 31 11 PM Chapter 8 8.16 B Lint regexp-variables Warns whenever one of the regular-expression variables or is used. -u .
