Question

我正在尝试使用bash for循环来选择一个数组，我希望将其成员用作for循环中的变量一级。我的问题是在第二个for循环中进行扩展，我无法弄清楚。

first_two_models=( model_one model_two )
second_two_models=( model_three model_four )


for name in first_two second_two; do
    for model in ${"$name_models"[@]}; do
        echo $model
    done
done

感谢您提供任何帮助！

Answer 1

for name in 'first_two_models[@]' 'second_two_models[@]'; do
    for model in "${!name}"; do
        echo "$model"
    done
done

Answer 2

您需要首先将数组引用构建为字符串，然后对该字符串使用间接引用来提取值：

first_two_models=( model_one model_two )
second_two_models=( model_three model_four )

for name in first_two second_two; do
    array="${name}_models[@]"     # build reference as string
    for model in "${!array}"; do  # use indirect reference to access
        echo "$model"
    done
done

用bash代替循环变量来获取数组名

2 个答案: