bite_size_js.tar.gz

RunNode12

Regular Expressions, also known as Regex, come in handy in a multitude of text processing scenarios. Regex defines a search pattern using symbols and allows you to find matches within strings. The applications of this span from software engineering to data science and beyond.

In this course, you will begin with an introduction to regex, its history, and various types of regular expressions. 

You will then learn how to create your own regular expressions using various techniques and special characters. In the latter half of the course, you will explore RegExp Objects, how to parse data, turn phrases into an array of strings, and lastly password and email pattern matching.

By the end of this course, you will be a regular expressions expert.

JavaScript Regular Expressions in Detail

Seeing the *“invalid email address”* message is quite common on log-in or sign-up forms. Sometimes this check is performed automatically by the input field since the latest version of HTML allows for the “email” type to be assigned. Thus the validation is done by the browser.


## Format of an email

Whether it’s the browser or you manually performing the validation, that task will require the use of a regular expression. Why? Because if you look at all the valid options for an email address, then you’ll find yourself creating a convoluted piece of code to verify it. That is, unless you use regular expressions.


In the case of email pattern matching, we need to validate three parts:


Seeing the *“invalid email address”* message is quite common on log-in or sign-up forms. Sometimes this check is performed automatically by the input field since the latest version of HTML allows for the “email” type to be assigned. Thus the validation is done by the browser.


# Format of an email

Whether it’s the browser or you manually performing the validation, that task will require the use of a regular expression. Why? Because if you look at all the valid options for an email address, then you’ll find yourself creating a convoluted piece of code to verify it. That is, unless you use regular expressions.


In the case of email pattern matching, we need to validate three parts:


Let's look into how we'll create the regular expression for email pattern matching. 

The Beginning of Regular Expressions

The Anatomy of Regular Expressions

The RegExp Object

Thinking in Regular Expressions

Regular Expressions in the Wild

Wrapping Up

Email Pattern Matching

Format of an email