Question

我是新手来编写脚本但是在访问数组时遇到问题。（或者我认为是一个数组）我使用文件glob来获取数组的内容。

我只想打印每个文件，然后允许用户根据其索引选择一个文件。但是我注意到所有内容都存储在数组的第一个元素中。我错过了什么？文件全球化不是我想要的最好的想法吗？

files=templates/*.tex
fnum=0
for file in $files
do
        echo $fnum : $file
        # bash expression is ((expression)) $(( expression )) expects a command
        (( fnum++ ))
done
read -p "Which file would you like to include: " answer
if [ $answer -ge 0 ] && [ $answer -lt $fnum ]
then
        echo ${$files[0]}
else
        echo bad range...
        exit 1
fi

Answer 1

files不是数组; files=( templates/*.tex )是。

files=( templates/*.tex )
fnum=0
for file in "${files[@]}"
do
        echo "$fnum : $file"
        (( fnum++ ))
done
read -p "Which file would you like to include: " answer
if [ "$answer" -ge 0 ] && [ "$answer" -lt "$fnum" ]
then
        echo "${files[answer]}"
else
        echo bad range...
        exit 1
fi

在bash中更具惯用性（不完全相同，但更简洁地提供相同的基本功能）：

PS3="Which file would you like to include: "
select answer in "${files[@]}"; do
    echo "$answer"
    break
done

Answer 2

你的files变量是一个字符串，试试files=( templates/*.tex )如果我没有误会这应该是一个文件数组

要遍历数组，您应该使用for file in "${files[@]}"

Bash数组访问文件全局

2 个答案: