regular expressions help!

Question

3.00/5 (2 votes)

See more:

hi im really struggling with regular expression i have to give english descriptions of the following regular expressions can anyone please please please help me..

i. a(aa)*
ii. a(b*ab*ab*)*
iii. b(b*ab*ab*)*

Posted 24-Oct-11 0:40am

gerface12

Updated 24-Oct-11 0:42am

Prerak Patel

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Amir Mahfoozi · Answer 1 · 2011-10-24T00:52:00

i. Find a "a" followed by either zero or more times "aa"s should be seen
ii. Find a "a" followed by either zero or more times of this pattern :
(
zero or more times "b" followed by zero or more times "ab" followed by zero or more times "ab"
)
iii. Find a "b" followed by either zero or more times of this pattern :
(
zero or more times "b" followed by zero or more times "ab" followed by zero or more times "ab"
)

I think two ab* could be merged to a one ab*. Don't you think so ?