perl getopt long example

We often use a program in Linux to add parameters. Now let's take a look at the functions related to control parameters in Perl. getopt. in Linux, there are two types of parameters. one is-help and the other is-H. that is, the difference between-and.

We often use a program in Linux to add parameters, and now it is much more powerful to understand the module Getopt::long in Perl about control parameters than to use @ARGV arrays directly. I think you know there are two different types of

We often use a program in Linux to add parameters. Now let's take a look at the functions related to control parameters in Perl. getopt. in Linux, there are two types of parameters. one is -- help, and the other is-H. that is, the difference between-

We often use a program in Linux to add parameters. Now let's take a look at the functions related to control parameters in Perl. getopt. in Linux, there are two types of parameters. one is-help and the other is-H. that is, the difference between-and.

I. Data Types(Data type): Perl has four data types: Scalar (variable), Scalar Array (Array), Hash Array (Hash), and References (pointer ), it seems to be rare, but it is more than enough to use it. Especially when writing Perl programs, you do not

one. DataType (data type ):Perl's data types are roughly four: Scalar (variables), Scalar Array (array), hash array (hash), References (pointer), but they seem to be small but more than sufficient. In particular, you can write a Perl program without

CPAN appconfig module and database-oriented Configuration     Level:

Python,perl,bash command line parameter part Idaily recurring and perl,python,bash dealings, but often confused between them, on the command line of the special and index differences, Python is really humanized, but the command line is very

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

There are two ways in which a Perl program needs to handle user input parameters:The first method is to use the @argv arrayThe second approach is to call the Getopt::long module, which is convenient and powerful. This article mainly introduces this