Check for leading alpha character, rest alphanumeric : Pattern matching « Regular Expression « Perl

1.	Array
2.	CGI
3.	Class
4.	Data Type
5.	Database
6.	File
7.	GUI
8.	Hash
9.	Language Basics
10.	Network
11.	Regular Expression
12.	Report
13.	Statement
14.	String
15.	Subroutine
16.	System Functions
17.	Win32
18.	XML

Java Source Code / Java Documentation

Java Open Source

Jar File Download

Photoshop Tutorials

Flash Tutorials

3ds-Max Tutorials

Illustrator Tutorials

C# / CSharp Tutorial

C# / CSharp Open Source

ASP.NET Tutorial

JavaScript DHTML

JavaScript Tutorial

JavaScript Reference

HTML CSS Reference

Python Tutorial

Python Open Source

SQL Server / T-SQL

SQL Server / T-SQL Tutorial

Oracle PL / SQL

Oracle PL/SQL Tutorial

VB.Net Tutorial

Flash / Flex / ActionScript

VBA / Excel / Access / Word

Microsoft Office PowerPoint 2007 Tutorial

Microsoft Office Excel 2007 Tutorial

Microsoft Office Word 2007 Tutorial

Perl » Regular Expression » Pattern matching

Check for leading alpha character, rest alphanumeric


    





#!/usr/bin/perl -w



foreach $patt (@ARGV) {

    # Check for leading alpha character, rest alphanumeric.

    if ($patt =~ /^[a-zA-Z]+[_0-9a-zA-Z]*$/) {

        print "\tLeading alpha, then alphanumeric in \"$patt\".\n";

    }

}

Related examples in the same category

1.	Pattern Matching Operators
2.	Pattern Modifiers
3.	Pattern Tester
4.	Pattern anchors in Perl.
5.	Pattern array
6.	Pattern match
7.	Pattern-Matching Operators(The syntax used to perform a pattern match on a string)
8.	Pattern-matching options.
9.	Patterns containing + always try to match as many characters as possible.
10.	Using variables containing matched subpatterns.
11.	Regular Expression Patterns
12.	Regular expression character patterns
13.	Regular expression metacharacters
14.	Regular expression modifiers
15.	Regular expression pattern quantifiers
16.	Regular expression: start a string with period
17.	Reversing subpatterns
18.	Repeating patterns
19.	Check for 'a'
20.	Check for 4-8 a's
21.	Check for a or b
22.	Check for and remove a trailing backslash character
23.	Check for no 'a'
24.	Check for white space
25.	A program that illustrates the use of the matching operator.
26.	/d.f/ matches d, followed by any non-newline character, followed by f
27.	/de{1,3}f/ matches d, followed by one, two, or three occurrences of e, followed by f.
28.	Print line unless it matches E
29.	Count the match times

www.java2java.com | Contact Us

Copyright 2009 - 12 Demo Source and Support. All rights reserved.

All other trademarks are property of their respective owners.