Regular expression for validating ip address
Each of the four numbers has a valid range of 0 to 255.
The following bash script contains a bash function which returns true if it is passed a valid IP address and false otherwise.
NET framework makes working with regular expressions quite easy.
I came across this fact while researching how to best go about validating a user-entered IP address in a Ruby application. It turns out the Resolv standard library includes the Resolv:: IPv4 class and the Resolv:: IPv6 class, each of which expose a regular expression to validate their respective formats.
Regex has never been included in C/C , until the very recent standards.
The ending quotation mark must not be preceded by a backslash character (\).
If the first character is a quotation mark, match a beginning quotation mark followed by at least one occurrence of any character, followed by an ending quotation mark.