split and join 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

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

Use in common to perl,python,awk,r, although Java,c,c++,vala also learned but do not like, you say how to do.It seems the life of the script.Perl@rray = split/pattern/, STRING, LIMITYou can see that split consists of 2 parts (String,pattern) and an

One, List A list is a sequence of values enclosed in parentheses that can be any value or NULL, such as: (1, 5.3, "Hello", 2), empty list: ().Note: A list containing only one numeric value (for example: (43.2)) is different from the value itself

Perl Arraysa Perl array is a list variable that stores scalar values, and variables can be of different types. array variables begin with @. Access array elements are read using the $ + variable name + [index value] format. 1. Creating an array1.

As we all know, Perl is very powerful in processing strings, and Perl (Practical Extraction and Reporting Language) is also very powerful in processing formats. Here we start to learn some Perl formats and string processing. Familiar with the three

1. Simple Variables ============== 1. Integer$ X = 123456;Perl stores integer data in floating-point registers. In fact, integer variables are treated as floating-point numbers in Perl, but they are only a special column of floating-point data.The

Here is the DNA sequence, stored under window F:\perl\data.txt: Copy Code code as follows: Aaaaaaaaaaaaaagggggggttttcccccccc Cccccgtcgtagtaaagtatgcagtagcvg Ccccccccccggggggggaaaaaaaaaaaaaaattttttat Aaacg Here's the

Perl language learning notes 9 Regular Expressions for text processing, perl Language Learning 1. Replacement S/PATTERN/REPLACE/; # returns the Boolean value of whether the replacement is successful. You can use capture variables, such as s/(\ w)/$1/