Regular Expressions (RegEx) Complete Tutorial.
A RegEx, or Regular Expression, is a sequence of characters that forms a search pattern.
RegEx can be used to check if a string contains the specified search pattern
Topics discussed here:-
- Notation, Conventions & Modes of Regex
- Literal Characters
- Meta Characters
- Special Characters
- Exercise 1
- Character Set & Range
- Negative MetaCharacters
- How to Define Metacharacters Inside Characterset
- Exercise 2
- Repetition Metacharacters
- Quantifiers Regex
- Greedy & Lazy Approach
- Exercise 3
- Anchors & Multiline
- Grouping & Alternation
Usage of Regex :-
- Matching a password.
- Matching Phone Number.
- Refactoring HTML Code.
- WebScraping.
& many more...
Regex is widely used in coding world.
Let's master it :)
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