Learn regex with code editor (vs-code).
At find control,
- enable regex,
- enable case-sensitive.
After enter your regex, press "ENTER" to navigate the next matched character.
- It only matches 1 character at a time.
. - Any Character Except New Line
\d - Digit (0-9)
\D - Not a Digit (0-9)
\w - Word Character
\W - Not a Word Character
\s - Whitespace (space, tab, newline)
\S - Not a Whitespace (space, tab, newline)
\b - Word boundary
\B - Not a Word boundary
^ - Beginning of a String
$ - End of a String
[] - Matches Characters in brackets
[^ ] - Matches Characters NOT in brackets
| - Either or
( ) - Group - to match a group of characters at one time.
By default, they only matches 1 character at a time. Use quantifier to match multiple Characters
Quantifiers:
* - 0 or more
+ - 1 or more
? - 0 or 1
{3} - Exact Number
{3,4} - Range of Numbers (Minimum, Maximum)
- email.in
/\S*@\S+//\S*@[a-zA-Z-]+\.(com|net|edu)/
- url.in (grab domain name + top-level-domain w/o www)
/(http|https)://[a-zA-Z.]+//https?://(www\.)?\w+\.\w+/- to capture both domain + top-level-domain.
/https?://(www\.)?(\w+)(\.\w+)/
To replace the captured group, use $1,$2,$3
- aoc.in (capture number of colored bags)
- my attempt.
/(\d+) (\w+ \w+) bags?/ - alternative,
/(\d) (.+?) bags?[,.]/
- htlm.in (put greediness to end)
- bad, because its greedy
/<.+>/ - correct, be greedy until you met '>' sign.
/<.+?>/
- rhb-account-selector (to capture the account number)
- first attempt
/i\s*([\d|-]+)/. I felt like this one is more succinct compared to 2nd attempt. - second attempt
/i\s*(\d+[\d|-]+)/. Trying to shake off the dependency on characteri. Since they might change to other characters. - third attempt
\s+(\d[\d|-]+)\s+. I think this is the best version. I'm grabbing something that is surrounded by at least 1 space. That account number should prefix with a number, followed by either digits or '-' symbol.
- great intro. https://www.youtube.com/watch?v=sa-TUpSx1JA
- put greediness to end. https://www.youtube.com/watch?v=EkluES9Rvak