Validating with regular expressions dealing with parents against interracial dating
On a 12-hour clock, if the first digit is 0, the second digit allows all 10 digits, but if the first digit is 1, the second digit must be 0, 1, or 2. On a 24-hour clock, if the first digit is 0 or 1, the second digit allows all 10 digits, but if the first digit is 2, the second digit must be between 0 and 3. Again, the question mark allows the first 10 hours to be written with a single digit.
Whether you’re working with a 12- or 24-hour clock, remove the question mark to require two digits.
micky.o'[email protected] not appreciate your code stopping them entering their address ...
apostrophes are perfectly valid in email addresses.
Unlike before, this regex will not match any part of This chapter has several other recipes for matching dates and times. matches a digit between 0 and 5, followed by a digit between 0 and 9.This correctly matches any number between 0 and 59.Recipe 2.9 explains how parentheses create capturing groups.Recipe 3.9 explains how you can retrieve the text matched by those capturing groups in procedural code.