Should accept alphabets and with regex_only one space but not in begin and end; no number and special chars allowed

Question

1.00/5 (1 vote)

See more:

Hi Friends,

Please will you provide regular express for the below.

should accept alphabets and with only one space but not in begin and end; no number and special chars allowed

The following should pass:
"A"
"A B"
"Hello There"

The following should fail:

" A"
"A "
" A "
" test"

What I have tried:

"^([a-zA-Z]+\S{0,1})*[a-zA-Z]+$"

Posted 20-Jun-17 23:28pm

kyswamy

Updated 20-Jun-17 23:48pm

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)

Patrice T · Answer 1 · 2017-06-20T23:48:00

Quote:
^([a-zA-Z]+\S{0,1})*[a-zA-Z]+$

As far as I can see, your RegEx is correct. You need to provide more informaions on how it fail.

Just a few interesting links to help building and debugging RegEx.
Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx:
Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]