12.11. Practice Problems - Regular Expressions¶
Construct a regex that matches both cat and cats.
Construct a regex that matches abc followed by zero to many digits (0-9).
Construct a regex that matches both gray and grey.
Construct a regex that matches br followed by any single character except for a new line and then a 3.
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Construct a regex that matches t.forward.
Construct a regex that matches a word that starts with an uppercase letter followed by at least one lowercase letter, like “Apple”, “Banana”, or “Carrot”.
Construct a regex that matches eight word characters (letter, digit, or underscore).
Construct a regex that matches one or more lowercase letters (a-z) followed by a space character and then two to four digits.
Construct a regex to capture numbers with 5-7 digits. For example: 48105, 103028, 1234567.
Construct a regex that captures strings that have two digits followed by a period and then four letters from a to z.