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Re: [bug-gawk] Does gawk optimize length(row) in for-loop?
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From: |
Andrew J. Schorr |
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Subject: |
Re: [bug-gawk] Does gawk optimize length(row) in for-loop? |
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Date: |
Sat, 25 Mar 2017 14:21:16 -0400 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Sat, Mar 25, 2017 at 02:18:20PM -0400, Andrew J. Schorr wrote:
> If you do know that they exist, then it's probably wiser to write:
> for (i in row)
> data[i] += row[i]
> But this loses the (desirable?) side-effect of creating empty row[i]
> entries for indices that are not already in the array.
(and also the side-effect of creating zero entries in the data array).