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Regular Expression Tutorial (TOC)

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Jessica Brown

By Jessica Brown in Tutorials

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Regular Expressions Tutorial Table of Contents

Regular Expression Tutorial pg 1

Word Boundaries pg 10

Understanding Atomic Grouping in Regular Expressions pg 19

Different Regular Expression Engines pg 2

Alternation with the Vertical Bar or Pipeline Symbol pg 11

Understanding Lookahead and Lookbehind in Regular Expressions (Lookaround) pg 20

Literal Characters pg 3

Optional Items pg 12

Testing Multiple Conditions on the Same Part of a String with Lookaround pg 21

Special Characters pg 4

Repetition with Star and Plus pg 13

Understanding the \G Anchor in Regular Expressions pg 22

Non-Printable Characters pg 5

Grouping with Round Brackets pg 14

Using If-Then-Else Conditionals in Regular Expressions pg 23

First Look at How a Regex Engine Works Internally pg 6

Named Capturing Groups pg 15

XML Schema Character Classes and Subtraction Explained pg 24

Character Classes or Character Sets pg 7

Unicode Regular Expressions pg 16

Understanding POSIX Bracket Expressions in Regular Expressions pg 25

The Dot Matches (Almost) Any Character pg 8

Regex Matching Modes pg 17

Adding Comments to Regular Expressions: Making Your Regex More Readable pg 26

Start of String and End of String Anchors pg 9

Possessive Quantifiers pg 18

Free-Spacing Mode in Regular Expressions: Improving Readability pg 27

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