- Match the line for every U.S. President: 46
/^\d{1,2},.+,\d{4},(?:\d{4})?,.+,.+,.+$/gm
- Whose home state was not Virginia or Massachusetts: 37
...,(?!Virginia|Massachusetts).+,...
- Whose last name is longer than 7 characters: 15
[A-Za-z.\s]+? \s [A-Za-z\s]+,
- First expressions says to use any letter.
- Any period or space repeated lazily, not greedy.
- The space comes after that.
...,[A-Za-z.\s]+?\s[A-Za-z\s]{8,},- Can also be a positive lookahead assertion as well:
...,(?=[A-Za-z.\s]+?\s[A-Za-z\s]{8,},).+,
- Whose name dose not include a middle initial: 29
...,[A-Za-z\s]+,......,[^.]+,...
- The above would look like
...,(?=[^.]+,).+,...
- Whose term in office began on or after 1900: 21
...,(?=19|20)\d{4},......,(?:19|20)\d{2},...- Should be only 1 president whom meets all the above requirements.
/^.+$/ matches each line from beginning to end.- You can then put all of the above requirements together into one string.
- The above would match the following string only:
“26,Theodore Roosevelt,1901,1909,Republican,New York, https://en.wikipedia.org/wiki/Theodore_Roosevelt”
- Don’t get frustrated if your regex don’t work out at the start.