Validates that a DNS hostname is well-formed only. You will still need to check that the overall length of the hostname, including the implied trailing "." (if not present), does not exceed 255 bytes.

Match a MasterCard with new range for 2017: 51-55 and 2221-2720 @incarnated

Validates CPA (Código Postal Argentino, spanish for Argentinian Postal Code).

Validates the two valid postal codes in Argentina

looks for blank keys in the query string and remove it, in order to make shorter request.

MasterCard - ^5[1-5]\d+ Visa - ^4\d+ Amex - ^3[47]\d+ Discover - 6011|65|64...

Funciona para campos decimais para moeda nacional brasileira. Aceita números inteiros, separação por milhar e a separação decimal.

Created for purpose of reading an INI file in C# applications. Supports comments and comment escape characters. I plan to add more escape characters (such as \=). s - Section scp - Section Comment Prefix sc - Section Comment...

Cloud Flare

email format control

With this C# regex, you can easily match/Parse Nested HTML tags. Example input: ...

Checks for valid UK/British postcodes. There was another on here that had for some reason been upvoted, but it was actually incorrect as it worked on none of my valid own postcodes! Namely that it assumed two letters and a number (BS3) when you can have variations (M20). Allows for an optional spac...

Attempts to mimic Google search box behavior, returning an array with the separated search strings (that keep the +/- indicator for following operations)

This may be useful or not to test whether a given string is a valid (more or less) html color value. It matches color values such as: #123 - short hex color value #123456 - hex color value rgb(255,255,0) - rgb color value rgba(255,255,0,1.0) - rgba color value hsl(360,100%,100%) - hsl color value...

Trim leading and trailing whitespace from a string.

Matches text within quotes (", ') and escapes the charecters.