I am trying to come up with a regular expression to help me validate the blood type field – it should only accept A [– ], B [– ], AB [–] and O [– ].
This is the regular expression I came up w
I am trying to come up with a regular expression to help me validate the blood type field – it should only accept A [– ], B [– ], AB [–] and O [– ].
This is the regular expression I came up w