Bash 关联数组大小
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Bash associative array size
提问by wick
Is there a way to get size of associative array in bash:
有没有办法在 bash 中获取关联数组的大小：
declare -A array
...without iterating through the elements?
...不遍历元素？
The size of interest is both: just number of elements, and memory amount it consumes?
感兴趣的大小是：只是元素数量和它消耗的内存量？
回答by devnull
${#array[@]}would return you the size of the array.
${#array[@]}将返回数组的大小。
$ declare -A array
$ array[foo]='something'
$ array[bar]='blah'
$ array[42]='nothing'
$ echo ${#array[@]}
3
回答by paul
You can use ${#array[@]}to get the number of elements.
您可以使用${#array[@]}来获取元素的数量。
I don't think it is possible to get the amount of memory it consumes however.
但是，我认为不可能获得它消耗的内存量。
