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Re: undo local variable with unset
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From: |
Chet Ramey |
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Subject: |
Re: undo local variable with unset |
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Date: |
Tue, 06 Jan 2015 09:11:37 -0500 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 |
On 1/5/15 3:14 PM, Poor Yorick wrote:
> In the following script, the effect of calling f0 is that the value global $i
> is still 5, but the effect of calling f1 is that the value of the global $i is
> 9. It's nice to be able to create a function like unlocal that moves local
> variables out of the way, but I'm wondering if it can be relied on in future
> versions:
This is a consequence of bash's dynamic scoping and the idea that a local
variable should stay local if it's unset at the current scope. I don't
have any plans to change that.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/