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From: Greg Wooledge <wooledg@eeg.ccf.org>
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Subject: Re: comment on RFE: 'shift'' [N] ARRAYNAME
Date: Thu, 27 Sep 2018 11:57:36 -0400
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On Thu, Sep 27, 2018 at 06:47:33PM +0300, Ilkka Virta wrote:
> Can you make an array whose name even starts with a digit?

No, that's also disallowed.  Bash variable names (including arrays) must
begin with a letter or underscore.