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a[0]='/'
set -- /
# these should all result in the empty (null) string
recho "${a[0]%?}"
recho "${a[*]%?}"
recho "${a[@]%?}"
recho "${*%?}"
recho "${@%?}"
recho "${a[0]#?}"
recho "${a[*]#?}"
recho "${a[@]#?}"
recho "${*#?}"
recho "${@#?}"
recho "${a[0]/\//}"
recho "${a[*]/\//}"
recho "${a[@]/\//}"
recho "${*/\//}"
recho "${@/\//}"
recho "${a[0]:1:1}"
# these next four will all echo /
# arrays are zero-based
recho "${a[*]:0:1}"
recho "${a[@]:0:1}"
# but the positional parameters start at 1
recho "${*:1:1}"
recho "${@:1:1}"
a[0]=''
set -- ''
# arrays are zero-based
recho "${a[*]:0:1}"
recho "${a[@]:0:1}"
recho "${*:1:1}"
recho "${@:1:1}"
# these should all result in the empty (null) string, or quoted as such
recho "${a[0]@Q}"
recho "${a[*]@Q}"
recho "${a[@]@Q}"
recho "${*@Q}"
recho "${@@Q}"
recho "${a[0]@L}"
recho "${a[*]@L}"
recho "${a[@]@L}"
recho "${*@L}"
recho "${@@L}"
# examples from the bug report
unset -v a
a[0]='/'
for i in "${a[@]%/}"; do recho "$i"; done
a[0]=''
for i in "${a[@]}"; do recho "$i"; done
a[0]='/'
a[1]="//"
for i in "${a[@]%/}"; do recho "$i"; done
unset -v x y
x=('/')
y=("${x[@]%/}")
echo "${#x[@]}:${#y[@]}"
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