Re: Curious bash evaluation
On Mon, 2010-12-27 at 10:46 -0600, inode0 wrote:
On Mon, Dec 27, 2010 at 10:05 AM, Rodolfo Alcazar Portillo
<nospaze(a)gmail.com> wrote:
> Hello. See this:
>
> # A="echo 'hi'"
>
> # echo $($A)
> 'hi'
That seems rather convoluted. Are you sure you don't just want to
"eval $A" anyway?
Very sure. Not "bash", nor "eval". Just simple command substitution.
Another reason: it's shorter. Another reason: It must be understood, not
just avoided in a micro$oft software fashion.
I realize your example may be a simple abstraction of something more
complex.
Of course. I'm building a short script from some string. The rest is
boring.
Another failing example:
cat script
echo "hello"
$(<script)
"hello"
The $(<file) form is documented in the manual:
http://www.faqs.org/docs/bashman/bashref_30.html
Thanks!
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Rodolfo Alcazar Portillo - nospaze(a)gmail.com
otbits.blogspot.com / counter.li.org: #367962
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