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Re: [Help-bash] Pathname expansion without word splitting

From: Sebastian Unger
Subject: Re: [Help-bash] Pathname expansion without word splitting
Date: Thu, 17 Sep 2015 20:35:38 +1200

Brilliant. I'm not entirely sure why I didn't arrive at that myself. I did
even think about setting IFS to null like so:
IFS= eval 'array=("address@hidden")'
Obviously with the double quotes the pathname expansion doesn't happen, but
I must have trained myself so hard over the years to ALWAYS double-quote
variable expansions, that I couldn't even conceive of a solution without
them anymore.

I think this is the first time in about 20 years bash scripting that I have
found a legitimate (and required) use of unquoted variable expansion.

On 17 Sep 2015 7:58 pm, "Geir Hauge" <address@hidden> wrote:

> On Thu, Sep 17, 2015 at 12:41:45PM +1200, Sebastian Unger wrote:
> > Hi There,
> >
> > I have tried to work this out by myself, but despite many years
> experience
> > writing bash scripts I was stumped a bit by this one:
> >
> > Given an array of pathname patterns, create a new array with all matching
> > file names (and only those) without running an external command. Be aware
> > that the pathname patterns may contain blanks (otherwise it would be too
> > simple ;-).
> You disable word splitting by assigning the empty string to IFS
>     shopt -s nullglob
>     IFS=
>     array=( address@hidden )
> --
> Geir Hauge


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