问题描述
我想提出一个bash脚本,我已经遇到了一个问题。所以我们可以说我得到了这个
I am making a bash script and I have encountered a problem. So let's say I got this
function create_some_array(){
for i in 0 1 2 3 .. 10
do
a[i]=$i
done
}
create_some_array
echo ${a[*]}
有没有什么办法可以使这项工作?我寻觅了很多,没有什么我找到的工作。
我想制作 A []
全局变量应该工作,但我无法找到的东西,实际工作中我的code。有什么办法从函数的数组返回主程序?
Is there any way I can make this work? I have searched quite a lot and nothing I found worked.I think making the a[]
a global variable should work but I can't find something that actually works in my code. Is there any way to return the array from the function to main program?
在此先感谢
推荐答案
描述这工作得很好。最可能的原因是不实际的code工作,是因为你碰巧在子shell中运行它:
This works fine as described. The most likely reason it doesn't work in your actual code is because you happen to run it in a subshell:
cat textfile | create_some_array
echo ${a[*]}
是行不通的,因为在管道运行的每一个元素在子shell,以及
would not work, because each element in a pipeline runs in a subshell, and
myvalue=$(create_some_array)
echo ${a[*]}
是行不通的,因为命令扩展在子shell中发生的。
would not work, since command expansion happens in a subshell.
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