alphanumeric string

[vishal.r]

How to check for an alphanumeric string using Regexp function?

[jcarmody]

[^\d\w]

[vishal.r]

Thanks a lot. But the above VI fails if i give underscore or empty space so we should add condition for it i guess.

I also got it in a similar way . I am trying without using regexp , by using ASCII . Is there any way of achieving it , suppose i give a single character and it should check for alphanum.

I have also enclosed in my VI for conversion and checking for alphanum string.

[jcarmody]

Why do you want to avoid using regular expressions?  Unless you're using this in a loop that needs to go very fast, a regexp is fine (and much cooler).

Sorry about forgetting the underscore; how's this?  The "pipe" is an OR operator.  This regexp looks for anything that's not a word character (letters, digits and underscores) and then looks for an underscore.  If it finds either, the input string is not alphanumeric.

[ben64]

I agree with Jim about the coolness of regex.

NOTE: The pipe and underscope should be included in the character class, the correct regex is [^\w|_]

Ben64

[jcarmody]

---

@ben64 wrote:

[...]

NOTE: The pipe and underscope should be included in the character class, the correct regex is [^\w|_]

---

That won't work.  My regexp is looking for anything that's not a word character or IS an underscore.  Yours looks for anything that's not a word character or an underscore, which is redundant and misses the underscore.

[ben64]

Sorry about that, I guess I misunderstood what is asked. I thought the OP was looking for anything that's not ( a word character or an underscore ).

Ben64

[Darin.K]

Remember that you can capitalize a character class for negation.

[Yamaeda]

"Any technology sofisticated enough is indistinguishable from magic."

Regexp is magic.

/Y

[JÞB]

of course there is the Lexical class function on the comparision palatte to do all the regexs for you!

Hmmmmm This round thing is neat--- I should call it a "Wheel"