# this is needed so that the bad assignments (b[]=bcde, for example) do not
# cause fatal shell errors when in posix mode
set +o posix

set +a
# The calls to egrep -v are to filter out builtin array variables that are
# automatically set and possibly contain values that vary.

# make sure declare -a converts an existing variable to an array
unset a
a=abcde
declare -a a
echo ${a[0]}

unset a
a=abcde
a[2]=bdef

declare -a b[256]

unset c[2]
unset c[*]

a[1]=

_ENV=/bin/true
x=${_ENV[(_$-=0)+(_=1)-_${-%%*i*}]}

declare -r c[100]

echo ${a[0]} ${a[4]}
echo ${a[@]}

echo ${a[*]}

# this should print out values, too
declare -a | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'

unset a[7]
echo ${a[*]}

unset a[4]
echo ${a[*]}

echo ${a}
echo "${a}"
echo $a

unset a[0]
echo ${a}

echo ${a[@]}

a[5]="hello world"
echo ${a[5]}
echo ${#a[5]}

echo ${#a[@]}

a[4+5/2]="test expression"
echo ${a[@]}

readonly a[5]
readonly a
# these two lines should output `declare' commands
readonly -a | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'
declare -ar | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'
# this line should output `readonly' commands, even for arrays
set -o posix
readonly -a | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'
set +o posix

declare -a d='([1]="" [2]="bdef" [5]="hello world" "test")'
d[9]="ninth element"

declare -a e[10]=test
declare -a e[10]='(test)'

pass=/etc/passwd
declare -a f='("${d[@]}")'
b=([0]=this [1]=is [2]=a [3]=test [4]="$PS1" [5]=$pass)

echo ${b[@]:2:3}

declare -pa | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'

a[3]="this is a test"

b[]=bcde
b[*]=aaa
echo ${b[   ]}

c[-2]=4
echo ${c[-4]}

d[7]=(abdedfegeee)

d=([]=abcde [1]="test test" [*]=last [-65]=negative )

unset d[12]
unset e[*]

declare -a | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'

ps1='hello'
unset ps1[2]
unset ${ps1[2]}

declare +a ps1
declare +a c

# the prompt should not print when using a here doc
read -p "array test: " -a rv <<!
this is a test of read using arrays
!

echo ${rv[0]} ${rv[4]}
echo ${rv[@]}

# the variable should be converted to an array when `read -a' is done
vv=1
read -a vv <<!
this is a test of arrays
!
echo ${vv[0]} ${vv[3]}
echo ${vv[@]}
unset vv

declare -a | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'

export rv
#set

x[4]=bbb
x=abde
echo $x
echo ${x[0]}
echo ${x[4]}
echo efgh | ( read x[1] ; echo ${x[1]} )
echo wxyz | ( declare -a x ; read x ; echo $x ; echo ${x[0]} )

# Make sure that arrays can be used to save the positional paramters verbatim
set -- a 'b c' d 'e f g' h

ARGV=( [0]=$0 "$@" )

for z in "${ARGV[@]}"
do
	echo "$z"
done

echo "$0"
for z in "$@"
do
	echo "$z"
done

# do various pattern removal and length tests
XPATH=/bin:/usr/bin:/usr/ucb:/usr/local/bin:.:/sbin:/usr/sbin

xpath=( $( IFS=: ; echo $XPATH ) )

echo ${xpath[@]}
echo ${xpath[@]##*/}
echo ${xpath[0]##*/}
echo ${xpath[@]%%[!/]*}
echo ${xpath[0]%%[!/]*}

# let's try to make it a DOS-style path

zecho "${xpath[@]/\//\\}"
zecho "${xpath[@]//\//\\}"
zecho "${xpath[@]//[\/]/\\}"

# length of the first element of the array, since array without subscript
# is equivalent to referencing first element
echo ${#xpath} -- ${#xpath[0]}

# number of elements in the array
nelem=${#xpath[@]}
echo ${#xpath[@]} -- $nelem

# total length of all elements in the array, including space separators
xx="${xpath[*]}"
echo ${#xx}

# total length of all elements in the array
xx=$( IFS='' ; echo "${xpath[*]}" )
echo ${#xx}

unset xpath[nelem-1]

nelem=${#xpath[@]}
echo ${#xpath[@]} -- $nelem

# arrays and things that look like index assignments
array=(42 [1]=14 [2]=44)

array2=(grep [ 123 ] \*)

echo ${array[@]}
echo "${array2[@]}"

# arrays and implicit arithmetic evaluation
declare -i -a iarray

iarray=( 2+4 1+6 7+2 )
echo ${iarray[@]}

iarray[4]=4+1
echo ${iarray[@]}

# make sure assignment using the compound assignment syntax removes all
# of the old elements from the array value
barray=(old1 old2 old3 old4 old5)
barray=(new1 new2 new3)
echo "length = ${#barray[@]}"
echo "value = ${barray[*]}"

# make sure the array code behaves correctly with respect to unset variables
set -u
( echo ${#narray[4]} )