声明数组但不定义数组（Shell脚本）

Question

There are alot of guides , guides out there which show how to declare and define an array

foo[0] = "abc" 
foo[1] = "def"

What i am trying to achieve is to declare an array but not define it because it does not have to be define immediately , in most programming languages it will look something like this

int bar[100];

Is this possible in shell scripting lanuage ??

Answer 1

You can do that using bash declare statement

declare -a bar

And then you can add values using

bar[0]=1
bar[1]=2
bar[2]=3

And print it using

echo ${bar[0]}
echo ${bar[1]}
echo ${bar[2]}

to output

1
2
3

You can read more here