perl convert string to number

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

Learning Perl 4ed Reading Notes Chapter2 scalar data1. Numbers. All data (INT, float) is of the double type in Perl. Of course, sometimes Perl also uses integer to represent int internally, because this can improve the running speed of the program,

Reference Common Perl Command Line options Common unix Commands: perl implements sed awk tr nl   Perl, sed, awk, tr, grep, nl, and other common commandsSed Task Sed Perl Replace12WithTwelve sed 's/12/twelve/g' perl -pe '

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

Reprinted: http://blog.csdn.net/jallin2001/archive/2009/11/13/4808618.aspx   The regular expression character set is often used to extract or exclude Chinese characters from a string. However, this is very troublesome and the effect is not very

Preface: Definition:The concept of singular and plural: Scalar is a single thing. perl uses scalar (the simplest data type in perl) to call a single thing. For most scalar values, it is either a number or a string composed of characters (perl does

Part I Programming Perl 1 Perl Data Types 1.1 Funny Characters Type Character Example is a name for: Scalar $ $cents An individual value (number or string) Array @ @large

Incident I rummaged over the books that spread the case. These books are all about programming and system management. After so many years of working as a programmer, there have been countless projects and software. Every new friend asks me this