英文:
zsh: "unknown file attribute" when adding an item to an array in a for loop
问题
适当的格式是在使用 zsh 的 for 循环和变量时向数组添加元素的方式是：
当我尝试运行
declare -a numbers
for i in {1..5}
do
numbers+=($i)
done
我得到 unknown file attribute: 1。
英文:
What is the proper format for adding an element to an array in zsh when using a for loop and variables?
When I try to run
declare -a $numbers
for i in {1..5}
do
$numbers+=($i)
done
I get unknown file attribute: 1.
答案1
得分: 0
在另一个情境中进行这项工作时，我发现在引用数组时不应该使用 $。而应该使用
numbers+=($i)
编辑
根据 @chepner 的评论，我还声明了数组在 $numbers 上，而不是在 numbers 上。这在这个特定示例中并没有引起明显问题，因为该变量尚不存在，但我可以看到在更复杂的情况下可能会引发问题。
英文:
While working on this in another context, I discovered that I'm not supposed to use $ when referencing the array. Instead of
$numbers+=($i)
I need to use
numbers+=($i)
Edit
Per the comment by @chepner, I was also declaring the array on $numbers instead of numbers. This didn't cause any obvious issues with this particular example because that variable didn't already exist, but I can see it causing problems in more complex situations.
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