ref function in perl

Perl's original designer was Larry Wall (Larry Wall), which was published on December 18, 1987. Perl borrows the features of C, sed, awk, shell scripting, and many other programming languages. Larry Wall Published version 1.0 of the Perl scripting

Perl ref Functions We all know that Perl has a reference concept: a group of data is actually a reference of another group of data. These references are called pointers. The first group of data stores the header address of the second group of data.

Chapter 2: References References are declared as scalar types (named variables starting with $), and reference is obtained using the \ operator. Modifying the referenced variable is equivalent to modifying the reference pointing to the

This is notes from reading the "Object Oriented Perl programming ". Elements of the @ _ array are special in that they are not copies of the actual arguments of the function call. rather they are aliases for those arguments. that means that if

In Perl, references to subroutines are often used to make callback functions (callback), closures (closure), especially anonymous subroutines.callback function (callback)For a callback function, see the article Understand: lexical scope, dynamic

Perl object-oriented first let's take a look at the three basic definitions of Perl Object-Oriented Programming: 1. an "object" refers to a simple reference that "there is a way to know which class it belongs. (An object is a reference variable) 2.

Source:Http://www.cnblogs.com/itech/archive/2012/08/21/2649580.htmlPerl Object Oriented first let's look at three basic definitions of Perl object-oriented Programming: 1. An "object" refers to a simple reference that "has a way of knowing which

First, let's look at three basic definitions of Perl object-oriented programming: 1. An "object" refers to a simple reference that "there is a way to know which class it belongs to". (object is reference variable)2. A "class" refers to a simple

Syntax There are only two ways to create a 'quot. Create reference Create Rule 1If you add a '/' sign before a variable, you will get the 'quota' of the variable '. $ Aref = // @ array; # $ Aref saves the 'quot' pointing to @ Array'$ Href =/% hash;

GrammarThere are only two ways to create ' references ', and they are two. Creating references Create Rule 1If you add a '/' number in front of a variable, you get a ' reference ' to the variable. $aref =/@array; # $aref Keep a ' reference ' to