替换命令的一般形式如下： :[range]s/{pattern}/{string}/[flags] [count] 该命令在[range]中的...
perl -00 -e 'print reverse <>' file1 file2 file3 ... 8、用随机数重写 # replace string XYZ with a random number less than 611 in these files perl -i.bak -pe "s/XYZ/int rand(611)/e" f1 f2 f3 9、揭示几个文件的基本性质 # 1. Run basename on contents of file perl -pe "s@...
die "You must provide $0 with a replacement string for the IP 111.111.111.111" unless $replacement; # we require that $replacement be JUST a valid IP address die "Invalid IP address provided: [$replacement]" unless $replacement =~ m/^$RE{net}{IPv4}$/; # replace the string in each f...
die "You must provide $0 with a replacement string for the IP 111.111.111.111" unless $replacement; # we require that $replacement be JUST a valid IP address die "Invalid IP address provided: [$replacement]" unless $replacement =~ m/^$RE{net}{IPv4}$/; # replace the string in each f...
my $utf8_string = decode("ISO-8859-1", $iso_string); 使用正确的文件句柄 在处理UTF-8文件时,需要使用正确的文件句柄。例如,可以使用以下代码打开一个UTF-8编码的文件: 代码语言:perl 复制 open(my $fh, "<:encoding(UTF-8)", "file.txt") or die "Cannot open file: $!"; 在读取或写入文件...
perl -pi -e ‘s/pattern/replacement/g’ file # 在文件中替换所有匹配模式的字符串 2. 使用Perl命令执行系统管理任务: perl -pi -e ‘$_=”disabled” if /service/’ file # 将文件中包含”service”的行替换为”disabled” perl -e ‘print join(“,”, @ARGV)’ file1 file2 # 打印多个文件名...
preg_replace():替换匹配的部分。 split():根据正则表达式拆分字符串。 $string = "Hello, World!"; if ($string =~ /World/) { print "Found 'World' in the string.\n"; } $new_string = s/World/Perl/; print "$new_string\n"; # 输出: Hello, Perl! 五...
$string="Hello world";$result=$string=~s/Hello/Hi/;# replace Hello with Hiprint$result;# prints 1 (success)print$string;# prints Hi world$result=$string=~s/o/a/g;# replace all o with a globallyprint$result;# prints 2 (success)print$string;# prints Hia warld$result=$string=~s/z...
$string = "43"; $number = 28; $result = $string + $number; # $result = 71 若字符串中含有非数字的字符,则从左起至第一个非数字的字符,如: $result = "hello" * 5; # $result = 0 $result = "12a34" +1; # $result = 13 ...
Replaces word prefixes in the following output. In this case words likefooSomeWordwill becomebarSomeWord. Macro <?:macro some_perl_code; ?> will runsome_perl_code;at the time of script generation. Whatever output the perl code produces will be included verbatim in the script output. Within...