Regular Expressions Hexadecimal number validation with .net

In mathematics and computer science, hexadecimal (also base-16, hexa, or hex) is a numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the symbols 0–9 to represent values zero to nine, and A, B, C, D, E, F (or a through f) to represent values ten to fifteen.

Regular Expression Pattern

^[a-fA-F0-9]+$

A description of the regular expression:

Beginning of line or string
Any character in this class: [a-fA-F0-9], one or more repetitions
End of line or string

Read the rest of this entry »

Finding Four and(or) Six letter words using regular expressions

In this regular expression we are going to find out All Four to Six letter words. A word is a unit (member) of language that represents a concept which can be expressively communicated with meaning. A word consists of one or more morphemes which are linked more or less tightly together, and has a phonetic value. Get more information about Finding Words using regular expressions.

Regular Expression Pattern

(?<=(?:\s|\G|\A))(\w{4}|\w{6})(?=(?:\s|\Z|\.|\?|\!))

Read the rest of this entry »

Finding Four to Six letter words using regular expressions

In this regular expression we are going to find out All Four to Six letter words. A word is a unit (member) of language that represents a concept which can be expressively communicated with meaning. A word consists of one or more morphemes which are linked more or less tightly together, and has a phonetic value. Get more information about Finding Words using regular expressions.

Regular Expression Pattern

(?< =(?:\s|\G|\A))\w{4,6}(?=(?:\s|\Z|\.|\?|\!))

Read the rest of this entry »

In this regular expression we are going to find out All Words. A word is a unit (member) of language that represents a concept which can be expressively communicated with meaning. A word consists of one or more morphemes which are linked more or less tightly together, and has a phonetic value.

Regular Expression Pattern

^\b\w+\b$

A description of the regular expression:

First or last character in a word
Alphanumeric, one or more repetitions
First or last character in a word

How It Works

This regular expression will check First or last character in a word. An Alphanumeric, one or more repetitions and First or last character in a word.

Read the rest of this entry »

Finding Blank Lines using regular expressions

In this regular expression we are going to find out blank lines. Means we are going to search lines containing only spaces (or Whitespace) and end of line.

Regular Expression Pattern

^\s*$

A description of the regular expression:

Beginning of line or string
Whitespace, any number of repetitions
End of line or string

How It Works

This regular expression will check for blank lines contains only spaces (Whitespace). Here we are going to search Beginning of line followed by Whitespace, any number of repetitions and End of line or string.

Read the rest of this entry »