Substitution question

Substitution question

[Björn Lindström]

Can somebody tell me what type of patterns are supported in l, in the
$x:s/l/r syntax?

I'd like to do something like:

$x:gs/[^A-Za-z0-9]/_

to replace all characters except for the ones listed with underscore.

Re: Substitution question

[DervishD]

    Hi Björn :)

 * Björn Lindström <bkhl@elektrubadur.se> dixit:
> Can somebody tell me what type of patterns are supported in l, in the
> $x:s/l/r syntax?

    Read the info manual, section 'History Expansion', node
'Modifiers'. Scroll down a bit and you'll find the answer. The 'l'
part is not a regex :(
 
> I'd like to do something like:
> 
> $x:gs/[^A-Za-z0-9]/_
> 
> to replace all characters except for the ones listed with underscore.

    ¿How about using ${x//PATTERN/REPLACEMENT}? Then you can use the
patterns valid for filename generation (sort of a regex, more or less
powerful depending on the option 'EXTENDED_GLOB'. For your example, I
would do:

    print ${x//[^[:alnum:]]/_}

    Whether to use 'print' or not is up to your particular use. The
double '//' is to say 'make substitutions global, not only the
first', and the 'regex' is to say 'al non alphanumeric characters'.
Hope this helps.

    Raúl Núñez de Arenas Coronado

-- 
Linux Registered User 88736
http://www.pleyades.net & http://raul.pleyades.net/