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Ever wondered how the search or replace button works? They are very useful commands. 

For beginners and professionals alike, we use these commands in our day-to-day work life, at least once a day. This is why I felt the need to build a course that could help you increase your knowledge and save time while working with strings or any sort of text.

The objective of this course is to help you get a strong grip on regular expressions, or in shorthand, regex. Instead of writing repetitive tasks, it mainly focuses on efficient searching in text files.

Regular Expressions for Programmers

Which of the following RegEx will output 4 after counting `e` on the input of “Elephant Eagle”?

Which of the following RegEx will output 4 after counting <code>e</code> on the input of “Elephant Eagle”?

Which of the following RegEx will match the text `Cat`, `cAt`, `CAT`? Select all that apply.

Which of the following RegEx will match the text <code>Cat</code>, <code>cAt</code>, <code>CAT</code>? Select all that apply.

What expression should you use to match words beginning with "wh"? `What`, `When`?

What expression should you use to match words beginning with “wh”? <code>What</code>, <code>When</code>?

What expression will match only "2.00"  from the given text? `2:00`, `2.00`, `2_00`, `2a00`, `2.00`?

What expression will match only “2.00” from the given text? <code>2:00</code>, <code>2.00</code>, <code>2_00</code>, <code>2a00</code>, <code>2.00</code>?

`.*` means any length of text. Which of the following texts will be matched by the RegEx `/.*/`? Select all that apply. 

<code>.*</code> means any length of text. Which of the following texts will be matched by the RegEx <code>/.*/</code>? Select all that apply.

Which RegEx will match the text "abc\ndef" (abc followed by def in a new-line)? Select all that apply.

Which RegEx will match the text “abc\ndef” (abc followed by def in a new-line)? Select all that apply.

Check your knowledge on literal and wildcard characters and escape characters.

Check your knowledge on literal and wildcard characters and escape characters.

Quiz yourself on different types of characters.

Introduction to RegEx

Characters

Character Set

Repetition Character

Grouping and Alteration Character

Anchor Character

Concepts about RegEx

Conclusion

Assessment 1

Quiz