#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
typeset -a a
a=(1 2 3 4)

typeset -A A
A=([one]=1 [two]=2 [three]=3 [four]=4)

unset 'a[0]'
typeset -p a

scalar=abcd
echo ${scalar[0]}

unset 'scalar[0]'
echo ${scalar-unset}

unset 'a[@]'
typeset -p a

unset 'A[@]'
typeset -p A

typeset -a a
a=(1 2 3 4)
typeset -A A
A=([one]=1 [two]=2 [three]=3 [four]=4)

# supported, recommended way to unset all array elements
a=()
typeset -p a
A=()
typeset -p A

declare -a foo
declare foo='(1 2 3)'
declare foo[1]='(4 5 6)'

declare -p foo