regular expression

Python Regex Tutorial: re.search, findall, sub and Validation with Examples

Submitted by jaypabs on

Sooner or later every programmer needs to find a pattern inside text: pull the dates out of a log file, check if an email address looks valid, clean up extra spaces in a name, or turn a title into a URL slug. You could write loops and if statements for each case, but there is a much shorter way: regular expressions (regex). Python supports them through the built-in re module, so there is nothing to install.

How to Do Pattern Matching in VB.NET

Submitted by ashok05 on
HOW TO DO PATTERN MATCHING IN VB.NET Searching for a particular text is one of the important applications in text processing. Searching becomes more difficult when the size of text increases. Regular expression is a method used to reduce the time and complexity of searching. Regular expressions also called as RegEX which describes the pattern (set of strings which needs to be searched). HOW TO

How to Validate a Registration Form Using Regular Expression in C#

Submitted by janobe on
In this tutorial, I will teach you how to validate a Registration Form using Regular Expression in C#. With this method, you can restrict all the textboxes in a form.It is also a guide for all users when they're going to fill up a registration form.

Let’s get started:

Open Microsoft Visual Studio 2008 and create new Windows Form Application for C#.

URL Validation using C#

Submitted by donbermoy on
Today, i will teach you how to create a program that will validate a URL inputted using C#. We know that a URL is the address of a specific Web site or file on the Internet. It cannot have spaces or certain other characters and uses forward slashes to denote different directories. Some examples of URLs are http://www.sourcecodester.com/, http://google.com/, etc. Now, let's start this validating a URL tutorial! 1.

Email Validation using C#

Submitted by donbermoy on
Today, I will teach you how to create a program that determines whether an inputted email is valid or not using C#. I have already a tutorial in this with vb.net but now I used C# here. So, now let's start this tutorial! 1. Let's start with creating a Windows Form Application in C# for this tutorial by following the following steps in Microsoft Visual Studio: Go to File, click New Project, and choose Windows Application and name your program ValidateEmail. 2.

Valid or Invalid Phone Number in VB.NET

Submitted by donbermoy on
Hi! This is my another tutorial in VB.NET entitled "Validating a Phone Number". We will just validate a phone number by using the System.Text.RegularExpressions namespace. So, now let's start this tutorial! 1. Let's start with creating a Windows Form Application for this tutorial by following the following steps in Microsoft Visual Studio: Go to File, click New Project, and choose Windows Application. 2. Next, add one TextBox named TextBox1 which will be used to input the phone number.
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