Two states of empty arryays

From	Léa Gris <lea@nomail.invalid>
Newsgroups	gnu.bash.bug
Subject	Two states of empty arryays
Date	2019-12-12 17:38 +0100
Organization	French Data Network
Message-ID	<mailman.738.1576170768.1979.bug-bash@gnu.org> (permalink)
References	<qstqe9$d93$1@solo.fdn.fr>

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Hello,

Depending on how an empty array is declared, it is not stored with the
same state.

# Empty array declared without parenthesis
unset myArr
declare -a myArr
typeset -p myArr
echo "${#myArr[@]}"

output:
declare -a myArr
0

# Empty array declared without parenthesis
unset myArr
declare -a myArr=()
typeset -p myArr
echo "${#myArr[@]}"

output:
declare -a myArr=()
0

What is the reason for having different states for empty arrays?

-- 
Lea Gris

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Two states of empty arryays Léa Gris <lea@nomail.invalid> - 2019-12-12 17:38 +0100

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