Bash 间接引用关联数组 [英] Bash indirect reference to an associative array

问题描述

在这个非常简单的例子中，我需要同时处理数组元素的键和值:

In this very simplified example, I need to address both key and value of an array element:

declare -A writer
writer[H.P.]=Lovecraft
writer[Stephen]=King
writer[Clive]=Barker
writer[Jack]=Ketchum

for i in ${!writer[@]}
do
    echo "$i ${writer[$i]}"
done

fullname()
{
    pointer=$1[@]
    for i in "${!pointer}"
    do
        echo "? $i"
    done
}
fullname writer

该函数必须以与之前的示例循环相同的格式显示输出，并且它应该接收数组名称、键或值列表，所有这些我都尝试过，但都没有成功.非常感谢任何建议.

The function must display the output in the same format as the example loop before it, and it should receive either array name, list of keys or values, all of which I tried, without success. Any suggestions are greatly appreciated.

推荐答案

indir_keys() {
    eval "echo ${!$1[@]}"
}

indir_val() {
    eval "echo ${$1[$2]}"
}

fullname()
{
    pointer=$1
    for i in $(indir_keys $pointer)
    do  
        echo "$i $(indir_val $pointer $i)"
    done
}

给予:

Jack Ketchum
Clive Barker
Stephen King
H.P. Lovecraft

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