On Mon, Apr 24, 2017 at 08:44:11AM -0400, Greg Wooledge wrote:
> On Mon, Apr 24, 2017 at 12:59:01PM +0200, wer...@suse.de wrote:
> > V_NAME=Friday
> > for (( INDEX=0; INDEX<$((10-$(expr length $V_NAME))); INDEX++ ))
>
> The outer (( )) in the C-style for loop already create an arithmetic
> expression context. You don't need to use $(( )) inside them. You can
> simply write:
>
> for (( INDEX=0; INDEX<10-${#V_NAME};; INDEX++ ))
>
> By the way, the [ ] index syntax in an indexed (not associative) array
> expansion works the same way. You can simply write:
>
> "${a[x+1]}"
>
> instead of
>
> "${a[$((x+1))]}"
Yes I know ... nevertheless, the initial code should not trigger an error
... to make it sure, the initial example was given by a user asking me
why this triggers an error, which IMHO it should not.
--
"Having a smoking section in a restaurant is like having
a peeing section in a swimming pool." -- Edward Burr
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