RegSub question

stammer · Post by **stammer** » Wed Apr 20, 2005 3:23 am

Hi all,

i have string like this :

asfgghgfh45453*)_()([]{}!@#%^^%+-^#$#@35fsggdfg34534ASDEd45

my question is how to remove from it all except
alphabet characters --> a-z, A-Z

out string have to look like this :

asfgghgfhfsggdfgASDEd

Thanks alot.

P.S. Sorry for my bad English I'm from Bulgaria

De Kus · Post by **De Kus** » Wed Apr 20, 2005 8:19 am

take out an ASCII table and put just all ranges of that chars you don't like within [] braces like [\000-\377].

greenbear · Post by **greenbear** » Wed Apr 20, 2005 12:05 pm

Code: Select all

regsub -all -nocase {[^a-z]} $string {} cleanstring

De Kus · Post by **De Kus** » Wed Apr 20, 2005 1:34 pm

Hmm, I somehow missread that [^...] thing in the manual, very intresting indeed

. in his example a much better solution

.

For example, assume the collating sequence includes a ch multi-character collating element. Then the RE [[.ch.]]*c (zero or more ch's followed by c) matches the first five characters of `chchcc'. Also, the RE [^c]b matches all of `chb' (because [^c] matches the multi-character ch).

confused me and made me ignore that:

If the list begins with `^', it matches any single character (but see below) not from the rest of the list.

stammer · Post by **stammer** » Thu Apr 21, 2005 6:18 am

Thanks alot to all

everything working ok...

Dedan · Post by **Dedan** » Thu Apr 21, 2005 7:49 am

Code: Select all


      regsub -all -- {[^A-z]} $text "" cleanstring

De Kus · Post by **De Kus** » Fri Apr 22, 2005 11:20 am

Dedan wrote:

Code: Select all


      regsub -all -- {[^A-z]} $text "" cleanstring

whats the sense of this? if you had looked at the posted ASCII table, you would know, that "A-z" and -nocase "a-z" are NOT the same.