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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