escape = This example of escape - Hello, World12345 标量运算 您将在单独的章节中看到Perl中可用的各种运算符的详细信息,但在这里我们将列出一些数字和字符串运算。 #!/usr/bin/perl$str ="hello"."world";# Concatenates strings.$num =
$var_string="Rain-Drops-On-Roses-And-Whiskers-On-Kittens"; $var_names="Larry,David,Roger,Ken,Michael,Tom"; # transform above strings into arrays. @string=split('-', $var_string); @names =split(',', $var_names); $string1=join( '-', @string ); $string2=join( ',', @names )...
The length function works only on strings, not on arrays. An array stores an ordered list and is preceded by an @ sign and populated using parentheses. To find out the length of an array, use the scalarfunction. For example: 应数是“6”,即数组中的项数。标量是数据的单个单位。它可以是一...
@array[0,1] = ("string", 46); # @array =("string",46,3,4,5) now @array[0..3] = (11, 22, 33, 44); # @array = (11,22,33,44,5) now @array[1,2,3] = @array[3,2,4]; # @array = (11,44,33,5,5) now @array[0..2] = @array[3,4]; # @array = (5,5...
#数组排序my@numbers =sort{$a <=> $b} @some_numbers;#数值my@string =sort{$a cmp $b} @some_strings;#字符串my@descending =reversesort{$a <=> $b} @some_numbers;my@descending =sort{$b <=> $a} @some_numbers;#结果同上#哈希值排序sortkeys%hash#这是对键排序sort{$hash{$b} <=> ...
my $max = maxstr(@strings); 如果对列表中的元素随机排序的话,可以用shuffle实现: use List::Util qw(shuffle); my @shuffle = shuffle(1..1000); #使列表元素的排序随机 不是CPAN自带的第三方模块:List::MoreUtils; use List::MoreUtils qw(none any all); ...
How to compare two strings case insensitive3.7.4. How to convert all the array elements in lowercase3.8. Perl lcfirst function3.8.1. The syntax forms3.8.2. How to convert the first character of a string in lowercase3.9. Perl length functionCopyright 漏 misc-perl-info.com3.9.1. The syntax...
Thereisashortcutforlistsofsingle-wordstrings, the“quoteword”function: ("bill","gates","pie","toss")#usualversion qw(billgatespietoss)#sameasabove qw(bill gates pie toss)#alsookay Slide5 Arrays Anarraycontainsalist(zeroormorescalar
argsCan be an array of strings / program arguments envUsed for setting environment variables when debugging,PATHandPERL5LIBdefault to system unless overwritten traceBoolean value to enable Debug Adapter Logging inperl-debug.logfile portNumber for port to listen for remote debuggers to connect to.(...
PERLDATA NAME - PERL DATA TYPES DESCRIPTION Variable names Context Scalar values Scalar value constructors Version Strings Special Literals Barewords Array Joining Delimiter List value constructors Subscripts Slices Typeglobs and Filehandles SEE ALSO NAME perldata - Perl data types DESCRIPTION Variable ...