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) Restrict Possible Usernames
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Classroom Contents
Learn Regular Expressions (Regex) - Crash Course for Beginners
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- 1 ) Using the Test Method
- 2 ) Match Literal Strings
- 3 ) Match a Literal String with Different Possibilities
- 4 ) Ignore Case While Matching
- 5 ) Extract Matches
- 6 ) Find More Than the First Match
- 7 ) Match Anything with Wildcard Period
- 8 ) Match Single Character with Multiple Possibilities
- 9 ) Match Letters of the Alphabet
- 10 ) Match Numbers and Letters of the Alphabet
- 11 ) Match Single Characters Not Specified
- 12 ) Match Characters that Occur One or More Times
- 13 ) Match Characters that Occur Zero or More Times
- 14 ) Find Characters with Lazy Matching
- 15 ) Find One or More Criminals in a Hunt
- 16 ) Match Beginning String Patterns
- 17 ) Match Ending String Patterns
- 18 ) Match All Letters and Numbers
- 19 ) Match Everything But Letters and Numbers
- 20 ) Match All Numbers
- 21 ) Match All Non-Numbers
- 22 ) Restrict Possible Usernames
- 23 ) Match Whitespace
- 24 ) Match Non-Whitespace Characters
- 25 ) Specify Upper and Lower Number of Matches
- 26 ) Specify Only the Lower Number of Matches
- 27 ) Specify Exact Number of Matches
- 28 ) Check for All or None
- 29 ) Positive and Negative Lookahead
- 30 ) Reuse Patterns Using Capture Groups
- 31 ) Use Capture Groups to Search and Replace
- 32 ) Remove Whitespace from Start and End
