我想在bash中实现以下伪代码
function gen_items() {
dict=$1 # $1 is a name of a dictionary declared globally
for key in $dict[@]
do
echo $key ${dict[$key]}
# process the key and its value in the dictionary
done
}
我遇到的最好的是
function gen_items() {
dict=$1
tmp="${dict}[@]"
for key in "${!tmp}"
do
echo $key
done
}
这实际上只从字典中获取值,但我也需要键。
答案 0 :(得分:1)
使用nameref:
show_dict() {
((BASH_VERSINFO[0] < 4 || ((BASH_VERSINFO[0] == 4 && BASH_VERSINFO[1] < 3)))) &&
{ printf '%s\n' "Need Bash version 4.3 or above" >&2; exit 1; }
declare -n hash=$1
for key in "${!hash[@]}"; do
echo key=$key
done
}
declare -A h
h=([one]=1 [two]=2 [three]=3)
show_dict h
输出:
key=two
key=three
key=one
请参阅: