Regular Expression (1)

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Chapter 1 Regular Expressions
20.1 character matching
20.2 optional character set
20.3 or match
20.4 Number of delimiters
20.5 greed and laziness
20.6 positioning Operator
20.7 group and back-Reference
20.8 Replace text
20.9 non-capture grouping and pre-Query
1. Non-capturing group? :
2. Forward pre-query? =
3. Reverse pre-query? <=
4. negative and positive pre-query ?!
5. Negative Reverse pre-query? <!
6. Notes #
20.10 regular expression class
20.11 Regular Expression options
20.12 exercise: Verify user input