Perl regex for street number street name, at least, one digit, one upper case letter, least two lowercase and one whitespace

I know this won't be perfect but I am looking for a regex to take a guess if a line in a file is a street address (w/o city state zip).

For example:

112 N Main

3525 Webster

1 Stone Ave

Morrison Number 34

So the recipe I am shooting for is: at least one digit, at least one upper case letter, at least two lowercase letters and at least one white space somewhere in the middle of the string. So far what I have is unsuccessful:

/[1-9][A-Z]{1}[a-z]{2}\s/

The pattern that you tried must match in the specified order, and does not handle that the mandatory characters are present in any order.

You might use:

^(?=[^\n\d]*\d)(?=\h*\S+\h+\S)(?=[^A-Z\n]*[A-Z])(?:[^a-z\n]*[a-z]){2}.*

The pattern matches:

• ^ Start of string
• (?=[^\n\d]*\d) Assert a digit using a negated character class ( the \n is there no not cross newlines)
• (?=\h*\S+\h+\S) Assert a horizontal whitespace char between 2 non whitspace chars
• (?=[^A-Z\n]*[A-Z]) Assert an uppercase char A-Z
• (?:[^a-z\n]*[a-z]){2} Match 2 lowercase chars a-z
• .* Match the rest of the line

See a regex demo

Note that in your regex you don't have to use the {1} as that is default, and if you want to match a digit 1-9 instead of 0-9 then you can change \d to [1-9]

Using \s can also match a newline, I have used \h to match a horizontal whitespace char but you could change that of course.