Variable substitution
am 27.08.2007 12:30:13 von Dattu
Hi All,
I have the below requirement. I Checked in google and
few of the sites and groups and unable to find the solution.
Requirement is as follows.
===
A="XYZ"
B="ABC"
XYZ_ABC="Status_300"
I would like to construct the string XYZ_ABC using $A abd $B and print
the value of $XYZ_ABC
It's like
> echo $A_$B
XYZ_ABC
Using the above values of $A_$B
Print the value of $XYZ_ABC
Something like
> echo $ ( $A_$B) should print the value "Status_300"
Thanks in advance,
Rao
Re: Variable substitution
am 27.08.2007 12:54:27 von cichomitiko
"Dattu" wrote ...
[...]
> Requirement is as follows.
>
> ===
> A="XYZ"
> B="ABC"
> XYZ_ABC="Status_300"
>
> I would like to construct the string XYZ_ABC using $A abd $B and print
> the value of $XYZ_ABC
>
> It's like
>
> > echo $A_$B
> XYZ_ABC
>
> Using the above values of $A_$B
>
> Print the value of $XYZ_ABC
[...]
bash 3.2.25(16) $ A="XYZ"
bash 3.2.25(16) $ B="ABC"
bash 3.2.25(16) $ XYZ_ABC="Status_300"
bash 3.2.25(16) $ eval "echo \$${A}_${B}"
Status_300
Dimitre
Re: Variable substitution
am 27.08.2007 12:58:49 von Dattu
Thanks a lot for the reply ....
Any other ways to caliculate the same ?
Thanks,
Rao
Re: Variable substitution
am 27.08.2007 13:01:31 von Janis Papanagnou
On 27 Aug., 13:58, Dattu wrote:
> Thanks a lot for the reply ....
>
> Any other ways to caliculate the same ?
What "the same"? Please quote context!
And what's wrong with the posted solution?
>
> Thanks,
> Rao
Re: Variable substitution
am 27.08.2007 13:07:42 von Dattu
Hi Janis,
Sorry for the confusion.
On Aug 27, 4:01 pm, Janis wrote:
> On 27 Aug., 13:58, Dattu wrote:
>
> > Thanks a lot for the reply ....
>
> > Any other ways to caliculate the same ?
> What "the same"? Please quote context!
"the same" means for the posted problem as above(Original post).
> And what's wrong with the posted solution?
Nothing worng with solution. It's working fine for me. But, I would
like to know the other kinds of solutions for the problem.
>
>
>
>
>
> > Thanks,
> > Rao- Hide quoted text -
>
> - Show quoted text -
Re: Variable substitution
am 27.08.2007 13:23:38 von cichomitiko
"Dattu" wrote in message ...
[...]
>> "Dattu" wrote ...
>> [...]
>>> Requirement is as follows.
>>>
>>> ===
>>> A="XYZ"
>>> B="ABC"
>>> XYZ_ABC="Status_300"
>>>
>>> I would like to construct the string XYZ_ABC using $A abd $B and print
>>> the value of $XYZ_ABC
>>>
>>> It's like
>>>
>> >> echo $A_$B
>>> XYZ_ABC
>>>
>>> Using the above values of $A_$B
>>>
>>> Print the value of $XYZ_ABC
>> [...]
>>
>> bash 3.2.25(16) $ A="XYZ"
>> bash 3.2.25(16) $ B="ABC"
>> bash 3.2.25(16) $ XYZ_ABC="Status_300"
>> bash 3.2.25(16) $ eval "echo \$${A}_${B}"
>> Status_300
[...]
> But, I would
> like to know the other kinds of solutions for the problem.
zsh 4.3.2 % eval print $"${!A}_${!B}"
eval print $"${A="XYZ"}_${B="ABC"}"
Status_300
Dimitre
Re: Variable substitution
am 27.08.2007 17:34:39 von Janis Papanagnou
On 27 Aug., 14:07, Dattu wrote:
> Hi Janis,
>
> Sorry for the confusion.
>
> On Aug 27, 4:01 pm, Janis wrote:
>
> > On 27 Aug., 13:58, Dattu wrote:
>
> > > Thanks a lot for the reply ....
>
> > > Any other ways to caliculate the same ?
> > What "the same"? Please quote context!
>
> "the same" means for the posted problem as above(Original post).
I thought so, but since this is Usenet and not a web forum you
should always quote all necessary context.
>
> > And what's wrong with the posted solution?
>
> Nothing worng with solution. It's working fine for me. But, I would
> like to know the other kinds of solutions for the problem.
Using eval is the standard way for this kind of "meta-indirection".
Janis
>
>
>
> > > Thanks,
> > > Rao- Hide quoted text -
>
> > - Show quoted text -