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Re: repost of alike 'missing a way to extract data'

From: Alex fxmbsw7 Ratchev
Subject: Re: repost of alike 'missing a way to extract data'
Date: Thu, 18 Mar 2021 14:44:06 +0100

i have currently no example
i tried converting assoc 2 arr and reverses, as for examples, with content
being weird filenames
that tries were a week ago or so, i ended up in loops instead of parsing
declare -p output sadly

but i demand extraction stuff, not just cutting away ... isnt it obvious ..
i mean .. err .. ?

${var//@(abc|cde)@(bla|blubb)/\2\1} # just like sed
and an extension for regex there

as for example, i can give you my garbage data

begin='declare -A a' end='declare -p a' per2 'a[$per]=' *
declare -A a=(["\\\\"]="" ["] \$( eval echo shitt )"]="" [$'abc
\034[22]="bar"']="" [$'\034']="" [$'\n']="" [2]="" ["]"]="" [" a   b"]=""
["' [b"]="" ["\" ["]="" [$'\' [1]=\034']="" ["];eval echo shitt"]=""
[$'foo\034 [2]="blah" ']="" [abc]="" ["abc [22]=\"bar\""]="" [blah]="" )


On Thu, Mar 18, 2021 at 2:33 PM Greg Wooledge <greg@wooledge.org> wrote:

> On Thu, Mar 18, 2021 at 02:15:19PM +0100, Alex fxmbsw7 Ratchev wrote:
> > pseudo exmaple
> Why not give a REAL example?
> > declare -A big=( mess of data )
> > var=$( declare -p big )
> >
> > now to extract the elements, beware with mess of data i dont mean 'mess'
> > 'of' 'data'
> You don't write bash code to parse bash syntax.  You let bash do it
> for you.
> Apparently you are trying to serialize an associative array and transmit
> it from one instance of bash to another.  That's totally fine, and
> declare -p is the right tool for that.
> In the second instance of bash, to reconstruct the serialized array,
> you simply eval the serialization (or source it, if it's in a file).
> In the first script:
> declare -A hash=(...)
> export serialized_hash="$(declare -p hash)"
> otherscript
> Then, inside otherscript:
> eval "$serialized_hash"
> Now you have an associative array named "hash", with a copy of the contents
> from the first script.  If you want to "extract the elements", you simply
> use "${hash[key1]}" and so on.

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