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Groups > gnu.bash.bug > #15714

Two states of empty arrays

From Léa Gris <lea.gris@noiraude.net>
Newsgroups gnu.bash.bug
Subject Two states of empty arrays
Date 2019-12-12 18:08 +0100
Message-ID <mailman.736.1576170542.1979.bug-bash@gnu.org> (permalink)
References <c9224e23-ff7d-ba84-dc4f-aa68db902f72@noiraude.net>

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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

-- 
Léa Gris

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Two states of empty arrays Léa Gris <lea.gris@noiraude.net> - 2019-12-12 18:08 +0100

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