The Complete Regular Expressions(Regex) Course For Beginners

Name: The Complete Regular Expressions(Regex) Course For Beginners
Rating: 4.8 (7967 reviews)

Regular Expressions (Regex) for Java,Linux,JavaScript,Python or other languages, with 30 illustrated exercises/examples.

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Highest Rated

Created byGeorge Sonora

Last updated 6/2026

English

What you'll learn

Learn Regular Expressions(regex) - A must have skills for an IT professional or a data scientist today in today's world.
Understand the core concepts. Once you understand the core concepts, regular expressions(regex) are a piece of cake!
Once you learn the basic technique, you can apply your knowledge of regex to any programming language like Java, Python, JavaScript, Linux command line etc.
Avoid rote learning, and follow beautifully designed illustrations to understand the core techniques of regular expressions(regex).
30 hands on examples; Each example comes with a step-by-step solution, with graphical illustrations.
Follow a well defined step-by-step process , exclusively designed by yours truly, which will enable you to create, use and apply regular expressions(regex) in any scenario that calls for it.
Hands-on sessions for multiple regex engines like Java, grep etc. The techniques will be taught in such a way, that you can apply it to ANY regex engine of your choice.
Follow standards while learning, so that the regex techniques that you learn in this course can be applied to any standard regex engine like Java, Python, Javascript, grep, sed etc.
Take up regex challenges once you have grasped the core concepts.
The whole course is scripted to perfection with subtitles.
Hand-typed subtitles are provided, which are 100% accurate. The auto generated speech-to-text subtitles are usually of not much use because of low accuracy.

Course content

6 sections • 34 lectures • 3h 33m total length

Introduction5:01
Explore how regular expressions search for patterns in data sets, show their use across Java, Javascript, Python, Ruby, and Linux, and help solve everyday problems.
Use Cases For Regular Expressions9:50
Course RoadMap5:03
About Course Subtitles1:40
Deep Dive - First Example7:11
Resources for Download0:03
A generic solution to any regex problem2:47
Hands-on with Linux Grep regex engine4:06
Learn how POSIX compliant regex engines unify patterns across languages and practice Linux grep to match patterns in a sample file, observing four of six entries.
Hands-on with Java regex engine3:40
Building a Foundation

Introduction1:01
Explore the POSIX basic set of regular expression symbols through examples and hands-on sessions, studying each symbol thoroughly and moving on to the remaining basics in the next module.
The Wildcard Symbol6:05
The lecture demonstrates using the dot wildcard in regex to match exactly one character between fixed prefixes foo and bar, forming the pattern foo...bar and validating it with grep.
Wildcard Asterisk Combo4:55
Representing Whitespaces4:24
Character Classes17:21
Character Classes With Ranges18:17
Apply character class ranges to differentiate green and red strings ending in oo, using j-m, union with z, and two-range patterns, then test with grep.
Escaping With Backslash22:05
Learn to escape regex metacharacters with a backslash to treat symbols like the period as literals, and build patterns such as x*\.y* or character classes to match x and y.
Anchors12:38
Regex: The Basic Set

Introduction0:55
Explore the POSIX-based regular expressions extended set, building on the basic set, and learn symbol-by-symbol meanings through examples and hands-on sessions.
Curly Braces Repeater10:18
Single Ended Curly Braces Repeater10:03
The Plus Repeater4:03
The Question Mark Binary4:09
Making Choices With Pipe3:32
Master the pipe to create alternatives in regular expressions, building a pattern like (log|ply)wood to match logwood or plywood.
Regex: The Extended Set

Introduction1:46
Learn to use regex to perform find and replace operations, define capture groups, craft substitution strings, and apply replacements with a regex engine through practical examples.
The Monitor Resolutions Problem12:37
Explore capturing numbers from monitor resolutions with regex and reformat them, for example 1280x720 to 1280 pix by 720 pix. Learn capture groups and references in sed and Java.
The First Name Last Name Problem6:30
The Clock Time Problem6:15
The Phone Number Problem7:01
Master masking 10-digit phone numbers with regex by capturing the last four digits and replacing the first six with x, using a backreference like \1 in the substitution.
The Date Problem6:55
Another Phone Number Problem7:08
Learn regex techniques to transform phone numbers using capture groups and replacement patterns, including literal escapes and sed substitutions, in the complete regex course for beginners.
Regex: Find and Replace with Capture Groups

Requirements

All you need is a PC and any tool or programming language of your choice,that has a regex engine. Even notepad++ will do!

Description

Regular expressions(regex) is a moderately difficult topic to grasp, as well as teach. It is really important that you grasp the core concepts thoroughly. Once you get the fundamentals right, regular expressions(regex) will come naturally to you. I struggled to learn regular expressions(regex) myself a couple of decades back. I completely understand the pain points. I have seen tons of free youtube videos on regular expressions(regex), but they all fail in something fundamental. They do NOT care about getting the basics right. I have taken immense efforts to prepare this course material. Each and every concept, each and every exercise, has been meticulously planned in such a way that it sticks to your brain easily. I have created graphical illustrations wherever possible to drive home the point. Each of the 30 examples come with graphical illustrations on how the regex techniques are applied in a step-by-step way, to come up with a solution.

I teach regular expressions(regex) using the POSIX standard. I have done so because the POSIX standard is followed by ALL regex engines. So if you know how to apply the techniques that you learn from this course, you can play around with regular expressions(regex) in ANY programming language of your choice. You could even try it out in Notepad++ (Yes, Notepad++ comes with a basic regex engine.)

I have hands-on sessions for ALL the 30 exercises in this course. Even if you are not familiar with the programming language, you will be able to follow it easily and apply it to your case.

I have kept my voice narration to a very slow pace on purpose. You can put me on 1.5x or even 2x speed on the Udemy player, if you think I am slow.

Something else that is special about this course - The subtitles are hand-scripted and accurate. I have even checked the timings to guarantee accuracy. Most courses come with subtitles that are auto-generated using a Speech-To-Text Engine, the accuracy of which is fairly low. But not mine! I have taken pains to script my course to perfection and include the subtitles too. So if you are at work, and you want to put me on mute, please feel free, although I would like you to hear my voice narration. If you want to put me on mute, just enable the subtitles in Udemy and play!

Who this course is for:

Anyone who wants to learn Regular Expressions(regex) inside out and apply them to solve day-to-day problems, Programmers, Developers, or even anyone who deals with data like data scientists etc.

The Complete Regular Expressions(Regex) Course For Beginners

What you'll learn

Explore related topics

Course content

Building a Foundation9 lectures • 39min

Regex: The Basic Set8 lectures • 1hr 27min

Regex: The Extended Set6 lectures • 33min

Regex: Find and Replace with Capture Groups7 lectures • 48min

Regex: Challenges2 lectures • 5min

Wrap up2 lectures • 1min

Requirements

Description

Who this course is for: