02 - Regular Expressions ( [^] + * \w \d \s \b )

| VBScript (.vbs) Tutorial
Before we apply regular expressions let's learn how to use them.
This video goes over the items:

Character Classes Matching:
[n-s] = [nopqrs]
[4-7] = [4567]
[^$%#Uy7] = matches everything but these characters after the ^
\d = [0-9]
\D = [^0-9]
\w = [a-zA-Z_0-9]
\W = [^a-zA-Z_0-9]
\s = [ \t\r\n\v\f]
\S = [^ \t\r\n\v\f]

Position Matching:
\b = matches word boundary
\B = matches non-word boundary

Repetition Matching:
? = {0,1}
* = {0, ...}
+ = {1, ...}

[robwheelut]

Thanks for the word boundary explanation. You did it concisely, very clear.

[igu]

Thank for the boundary explanation now i understands this is simple

[prasannakumar]

Thanks for your reply. I really like your way of explanation very much. I think you are very knowledgeable person, that's why you are explaining in better way. So many people are just copy pasting definitions and examples.from different websites but your's examples are very different and understandable to everyone. I appreciate for making videos like this. Good job.

[conrat]

Wonderful and simple explanation. Thank you much!

[learningbegins]

Thanks a lot for such clear cut explanation.

[troyswanson]

This is a very helpful video. Thank you!

[charliemaguire]

Very helpful and clear video. Just one thing though, in the text below the video the \W and \S equivalents are missing the caret(^)

[joelkhan]

Came across your videos. I love the step by step explanations. By any chance do you teach hands on or live classes? I would love to be part of your class or your team of students. I am a Texan as well!

[Manojshankar]

what is the shorthand regular expression for - [a-zA-Z0-9] and [a-zA-Z] (no underscore)!!!

[prasannakumar]

Sir, could you please clarify me a doubt if don't mind and if time permits?
I need to match 4 digit words like 1234 (23456) with or without brackets for that I have written objRe.pattern="\(?\d{4}\)?" it is working as expected but I need to apply boundary for this as I dont want it matches with 1112345 333(23456) . For this I have written num.pattern="\b\(?\d{4}\)?\b" but it is not working as I expected. it matching even match is part of some other string.

[suhasmahamuni]

How to find "Error or error or Error Handling" words from a large notepad?