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The following should be matched:
AAA123 ABCDEFGH123 XXXX123 can I do: ".*123" ?
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To match a character having special meaning in regex, you need to use a escape sequence prefix with a backslash ( \ ). E.g., \. matches "." ; regex \+ matches "+" ; and regex \( matches "(" . You also need to use regex \\ to match "\" (back-slash).
Use square brackets [] to match any characters in a set. Use \w to match any single alphanumeric character: 0-9 , a-z , A-Z , and _ (underscore). Use \d to match any single digit. Use \s to match any single whitespace character.
[abc] : matches a, b, or c. [a-z] : matches every character between a and z (in Unicode code point order). [^abc] : matches anything except a, b, or c.
To run a “whole words only” search using a regular expression, simply place the word between two word boundaries, as we did with ‹ \bcat\b ›. The first ‹ \b › requires the ‹ c › to occur at the very start of the string, or after a nonword character.
Yes, you can. That should work.
. = any char except newline\. = the actual dot character.? = .{0,1} = match any char except newline zero or one times.* = .{0,} = match any char except newline zero or more times.+ = .{1,} = match any char except newline one or more times
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