Capturar ultimo caracter de una linea

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5 total messages Started by speeter Tue, 07 Mar 2006 15:21

#1258

Author: speeter
Date: Tue, 07 Mar 2006 15:21

8 lines
1152 bytes

Hola a todos

Estoy haciendo un script en bash y necesito capturar el ultimo caracter 
de una linea, en una variable.

Alguna idea?

Saludos

Re: Capturar ultimo caracter de una linea

#1259

Author: Pascal Bourguignon
Date: Tue, 07 Mar 2006 15:41

11 lines
1579 bytes

speeter <speeter@terra.es> writes:
> Estoy haciendo un script en bash y necesito capturar el ultimo
> caracter de una linea, en una variable.

linea="abcdef"
ultimo_caracter="${linea:$((${#linea}-1))}"
printf "%s\n" "$ultimo_caracter"


-- 
__Pascal Bourguignon__                     http://www.informatimago.com/

Re: Capturar ultimo caracter de una linea

#1260

Author: speeter
Date: Tue, 07 Mar 2006 16:00

19 lines
1571 bytes

Pascal Bourguignon wrote:

> speeter <speeter@terra.es> writes:
> 
>>Estoy haciendo un script en bash y necesito capturar el ultimo
>>caracter de una linea, en una variable.
> 
> 
> linea="abcdef"
> ultimo_caracter="${linea:$((${#linea}-1))}"
> printf "%s\n" "$ultimo_caracter"
> 
> 
Gracias Pascal, funciona ok.

Donde (pagina man, manual, etc) puedo consultar la sintaxis de lo que me 
pones?

Saludos

Re: Capturar ultimo caracter de una linea

#1163

Author: Han Solo
Date: Tue, 07 Mar 2006 16:01

35 lines
1941 bytes

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speeter <speeter@terra.es> writes:

> Hola a todos
>
> Estoy haciendo un script en bash y necesito capturar el ultimo
> caracter de una linea, en una variable.
>
> Alguna idea?

Seguro que se puede hacer mejor. A m� me gusta el perl...

echo "Esto es una cadena de prueba"|perl -e 'while (<>){/(.)$/;print "$1\n"}'

Un Saludo
- -- 
Han Solo
The Rebel Alliance

Emacs is not on every system

So what? [...] Do you tell your administrative people to stick with
notepad.exe? Do you tell your fat kids they can only have the crummy
games that come with their video games or plain dress that comes with
Barbie?
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Re: Capturar ultimo caracter de una linea

#1164

Author: Pascal Bourguignon
Date: Tue, 07 Mar 2006 16:29

37 lines
2495 bytes

speeter <speeter@terra.es> writes:

> Pascal Bourguignon wrote:
>
>> speeter <speeter@terra.es> writes:
>> 
>>>Estoy haciendo un script en bash y necesito capturar el ultimo
>>>caracter de una linea, en una variable.
>> linea="abcdef"
>> ultimo_caracter="${linea:$((${#linea}-1))}"
>> printf "%s\n" "$ultimo_caracter"
>> 
> Gracias Pascal, funciona ok.
>
> Donde (pagina man, manual, etc) puedo consultar la sintaxis de lo que
> me pones?

Por supuesto, esta en:
   man bash


    [...]
       ${parameter:offset:length}
              Substring Expansion.  Expands  to  up  to  length  characters  of
              parameter  starting  at  the  character  specified by offset.  If
              length is omitted, expands to the substring of parameter starting
              at  the  character  specified  by  offset.  length and offset are
    [...]


-- 
__Pascal Bourguignon__                     http://www.informatimago.com/

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