1#   This program is free software: you can redistribute it and/or modify
2#   it under the terms of the GNU General Public License as published by
3#   the Free Software Foundation, either version 3 of the License, or
4#   (at your option) any later version.
5#
6#   This program is distributed in the hope that it will be useful,
7#   but WITHOUT ANY WARRANTY; without even the implied warranty of
8#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9#   GNU General Public License for more details.
10#
11#   You should have received a copy of the GNU General Public License
12#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
13#
14typeset -a a
15a=(1 2 3 4)
16
17typeset -A A
18A=([one]=1 [two]=2 [three]=3 [four]=4)
19
20unset 'a[0]'
21typeset -p a
22
23scalar=abcd
24echo ${scalar[0]}
25
26unset 'scalar[0]'
27echo ${scalar-unset}
28
29unset 'a[@]'
30typeset -p a
31
32unset 'A[@]'
33typeset -p A
34
35typeset -a a
36a=(1 2 3 4)
37typeset -A A
38A=([one]=1 [two]=2 [three]=3 [four]=4)
39
40# supported, recommended way to unset all array elements
41a=()
42typeset -p a
43A=()
44typeset -p A
45
46declare -a foo
47declare foo='(1 2 3)'
48declare foo[1]='(4 5 6)'
49
50declare -p foo
51