Very Computer

The problem is this: a script generates (very) many
variables that have a certain pattern to them, like this:

   $ AB_0_0=1
   $ AB_0_1=2

At some point I need to 'unset' all of them:

   $ unset AB_0_0 AB_0_1

This is practical only for a few of them. Is there a way
to unset all of them in some simple fashion, like

   $ unset AB*  

I know the above (which is meant to be 'regexp-like')
doesn't work, but this is the idea I am after.

If the variables were all exported, one could think of
something like (not pretty):

   $ env | grep '^AB' | while read var
                        do unset ${var%%=*}
                        done

but my variables are not exported (so 'env' doesn't output
them).

Any idea?

---Zdenek

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Quote:

>If the variables were all exported, one could think of
>something like (not pretty):

>   $ env | grep '^AB' | while read var
>                        do unset ${var%%=*}
> done

>but my variables are not exported (so 'env' doesn't output
>them).

set | grep '^AB' | ...

Quote:

>>If the variables were all exported, one could think of
>>something like (not pretty):

>>   $ env | grep '^AB' | while read var
>>                        do unset ${var%%=*}
>> done

>>but my variables are not exported (so 'env' doesn't output
>>them).

>set | grep '^AB' | ...

Argh, completely overlooked this one...thanks!

---Zdenek

You are one of the few people I know to be using ksh93, Zdenek; is
this true? If so, you have the capability of doing:

unset ${!AB*}

=Brian

Hi, Brian, actually both (88/93) but your 93 way above really
intrigued me so I went back to THE book (B&K) and obviously it's all
there, clearly spelled out. Maybe I should read that book more often!
Thanks for putting me on the right track!

---Zdenek