如何通过一个关联数组作为参数传递给bash中的一种功能？ [英] How to pass an associative array as argument to a function in Bash?

问题描述

如何传递一个关联数组作为参数传递给函数？这是可能的Bash的？

下code未按预期工作：

 功能iterateArray
{
    当地ADATA =$ {@}＃关联数组在关键的$ {！ADATA [@]}
做
    回声键 -  $ {}键
    回声值：$ {ADATA [$关键]}DONE}
 

传递关联数组给函数像普通数组不工作：

  iterateArray$ A_DATA
 

或

  iterateArray$ A_DATA [@]
 

解决方案

我有完全相同的问题，上周想了好一阵子。

看来，该关​​联数组无法序列或复制。有一个很好的Bash FAQ项关联数组其中解释加以详细。最后一节给我的想法如下这对我的作品：

 功能print_array {
    ＃EVAL串入一个新的assocociative阵列
    EVAL声明-A func_assoc_array =$ {1＃* =}
    ＃证明阵列已成功创建
    声明-p func_assoc_array
}＃声明assocociative数组
声明-A assoc_array =（[键1] =值1[键2] =值2）
＃显示assocociative数组定义
声明-p assoc_array＃通过字符串形式assocociative阵列的功能
print_array$（申报-p assoc_array）
 

How do you pass an associative array as an argument to a function? Is this possible in Bash?

The code below is not working as expected:

function iterateArray
{
    local ADATA="${@}"            # associative array

for key in "${!ADATA[@]}"
do
    echo "key - ${key}"
    echo "value: ${ADATA[$key]}"

done

}

Passing associative arrays to a function like normal arrays does not work:

iterateArray "$A_DATA"

or

iterateArray "$A_DATA[@]"

解决方案

I had exactly the same problem last week and thought about it for quite a while.

It seems, that associative arrays can't be serialized or copied. There's a good Bash FAQ entry to associative arrays which explains them in detail. The last section gave me the following idea which works for me:

function print_array {
    # eval string into a new assocociative array
    eval "declare -A func_assoc_array="${1#*=}
    # proof that array was successfully created
    declare -p func_assoc_array
}

# declare an assocociative array
declare -A assoc_array=(["key1"]="value1" ["key2"]="value2")
# show assocociative array definition
declare -p assoc_array

# pass assocociative array in string form to function
print_array "$(declare -p assoc_array)" 

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