Regex formulas are immensely helpful tool for standardizing a sequence of characters. At their base, they define a search pattern and work across most languages. Ensuring user inputs are provided in the correct format, preventing incorrect data from undermining database integrity, and searching a document are just a few of the valuable uses for regular expression.
/^([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/
One of the most common and useful regex expressions is the expression above uses to define email address.
Like all regex, this expression can be broken down into parts. This gist will breakdown the code above.