perl pattern matching

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

First, Introductionpattern refers to the character of a particular sequence that is searched for in a string, which is included by a backslash:/def/, Mode def. Its usage, such as combining function split, splits a string into multiple words in a

First, Introduction Pattern refers to the character of a particular sequence that is searched for in a string, which is included by a backslash:/def/, Mode def. Its usage, such as combining function split, splits a string into multiple words in a

  Chapter 6 pattern matching By flamephoenix I. IntroductionIi. Matching Operators3. Special characters in the Mode1. Character +2. characters [] and [^]3. characters * and?4. escape characters5. match any letter or number6. Anchor Mode7. replace

About the origins and characteristics of Perl and Python Perl is the abbreviation of practical extraction and report Language, created by Larry Wall in 1987, originally designed to facilitate the processing of reports on UNIX, and has become a fully

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

Sixth chapter Pattern Matchingby FlamephoenixFirst, IntroductionSecond, match operatorThird, special characters in the pattern1, character +2, characters [] and [^]3, characters * and?4. Escape character5. Match any letter or number6. Anchor Mode7.

A regular expression, which is an object that describes the character pattern. The RegExp class for JavaScript represents regular expressions, and both string and RegExp define methods, which use regular expressions for powerful pattern matching and

Introduction to Perl syntax 1.PERL variables 1.1.Perl Variable Classification 1.2.Perl variables 1.2.1 Scalar variable 1.2.2 Array Variables 1.2.3 Scalar and array variables 1.2.4 Associative arrays 2