扩展bash数组仅给出第一个元素 [英] Expanding a bash array only gives the first element

问题描述

我想将当前目录的文件放在一个数组中，并使用此脚本回显每个文件:

I want to put the files of the current directory in an array and echo each file with this script:

#!/bin/bash

files=(*)

for file in $files
do
    echo $file
done

# This demonstrates that the array in fact has more values from (*)
echo ${files[0]}  ${files[1]} 

echo done

输出:

echo.sh
echo.sh read_output.sh
done

有人知道为什么在此for循环中仅打印第一个元素吗?

Does anyone know why only the first element is printed in this for loop?

推荐答案

$files扩展到数组的第一个元素. 尝试echo $files，它将仅显示数组的第一个元素. 出于相同的原因，for循环仅打印一个元素.

$files expands to the first element of the array. Try echo $files, it will only print the first element of the array. The for loop prints only one element for the same reason.

要扩展到数组的所有元素，您需要编写为${files[@]}.

To expand to all elements of the array you need to write as ${files[@]}.

迭代Bash数组元素的正确方法:

The correct way to iterate over elements of a Bash array:

for file in "${files[@]}"

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