From: Bart Schaefer <schaefer@brasslantern.com>
To: Zsh Users <zsh-users@sunsite.dk>
Subject: Re: Printing arrays for use with $()
Date: Fri, 12 Aug 2005 14:37:13 +0000 [thread overview]
Message-ID: <1050812143713.ZM13160@candle.brasslantern.com> (raw)
In-Reply-To: <20050812082909.GB354@DervishD>
On Aug 12, 10:29am, DervishD wrote:
}
} > But again all of this assumes you can control the caller, which means
} > you could just as easily require IFS=$'\0'.
}
} Do you mean something like this?:
}
} IFS=$'\0' du -s `myscript`
Yes, except that you need a semicolon ...
IFS=$'\0'; du -s `myscript`
... which also means that you probably need to save and restore the old
value of IFS. From that standpoint the "eval" is likely better.
} I'm thinking about another solution that could be better, since
} sometimes I want to manually review the list before passing it to the
} command (and the scripts generates a *different* list each time is
} called):
}
} array=(`myscript args`)
A potential way to do this would be to have myscript print the entire
assignment expression:
print -r -- array=\( ${(q)array} \)
and then have the caller simply do:
eval $(myscript args)
} Could I do the above, using 'print -N', and after that forcing
} the split in NULLs? I've tested this (doesn't work):
}
} array=(`print -N -- $list`)
This doesn't work because in an array context zsh is going to split on
$IFS during the assignment itself, so you already have the wrong thing
in $array before you even get as far as printing it. You need to use
a scalar assignment:
notyetarray=`print -N -- $list`
array=(${(s:$'\0':)notyetarray})
Or (note the double quotes):
array=( ${(ps:\0:)"$(print -rN -- $list)"} )
} Any way of doing this without much mess?
The above is about as un-messy as it gets.
next prev parent reply other threads:[~2005-08-12 14:37 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-11 16:16 DervishD
2005-08-11 16:37 ` Bart Schaefer
2005-08-11 17:01 ` DervishD
2005-08-11 22:28 ` DervishD
2005-08-12 2:07 ` Wayne Davison
2005-08-12 7:45 ` DervishD
2005-08-12 2:27 ` Bart Schaefer
2005-08-12 8:29 ` DervishD
2005-08-12 14:37 ` Bart Schaefer [this message]
2005-08-12 14:52 ` DervishD
2005-08-12 14:32 ` DervishD
2005-08-12 14:57 ` DervishD
2005-08-13 1:34 ` Bart Schaefer
2005-08-13 8:28 ` DervishD
2005-08-13 18:54 ` Bart Schaefer
2005-08-13 21:52 ` DervishD
2005-08-11 19:40 ` Dan Nelson
2005-08-11 20:09 ` DervishD
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