/usr/bin/perl$age =25;# An integer assignment$name ="John Paul";# A string$salary =1445.50;# A floating pointprint"Age = $age\n";print"Name = $name\n";print"Salary = $salary\n";12345678 这将产生以下结果 - Age = 25 Name = John Paul Salary = 1445.5 1234 数字标量 标量通常是数...
Ok, but how about when you want to really see your data, what's in that dynamic variable, just before using it? 如何查看动态变量的值呢?先来看下面的代码: #!/usr/bin/perlusestrict;my$key='welcome';my%data=('this'=> qw(that),'tom'=> qw(and jerry),'welcome'=> q(Hello World),...
"My name is Sam" Perl also has many special variables, which are denoted by altering the normal variable indicators, as shown inthis list. An example of a more advanced program from Perl.org is below. This program sends an email using Perl script: #!/usr/bin/perl use strict; use warni...
NAME , binmode FILEHANDLE, LAYER , binmode FILEHANDLE, bless REF,CLASSNAME , bless REF, break, caller EXPR , caller, chdir EXPR , chdir FILEHANDLE, chdir DIRHANDLE, chdir, chmod LIST , chomp VARIABLE , chomp( LIST ), chomp, chop VARIABLE , chop( LIST ), chop, chown LIST , chr ...
#!/usr/local/bin/perl $name = "Ali"; $age = 10; $status = ($age > 60 )? "A senior citizen" : "Not a senior citizen"; print "$name is - $status\n"; 123456 这将产生以下结果 - Ali is - Not a senior citizen 12 Perl - Loops ...
In fact, a dynamic variable (also known as package or global variables) are still accessible using the fully qualified :: notation even while a lexical of the same name is also visible: package main; local $x = 10; my $x = 20; print "$x and $::x\n"; That will print out 20 ...
Perl动态/符号函数引用使用一个表达式产生一个变量的名字，而这个表达式需要一个变量名，这被称为符号引用...
or until the next"package"declaration. Unqualified dynamic identifiers will be in this namespace, except for those few identifiers that, if unqualified, default to the main package instead of the current one as described below. A"package"statement affects only dynamic global symbols, including subro...
To avoid creating a newSVevery time"SaveSub2"is called, the function first checks to see if it has been called before. If not, then space for a newSVis allocated and the reference to the Perl subroutine"name"is copied to the variable"keepSub"in one operation using"newSVsv". Thereafter...
NAME Workflow - Simple, flexible system to implement workflows VERSION This documentation describes version 2.01 of Workflow SYNOPSIS use Workflow::Factory qw( FACTORY ); # Defines a workflow of type 'myworkflow' my $workflow_conf = 'workflow.xml'; # contents of 'workflow.xml' <workflow> <typ...