Randomly apply manipulator when applying manipulator with limit

[seongahjo]

ArbitraryNodes found by expression has fixed ordering.
So applying manipulator with parameter limit, which parameter used as limiting the number of applied ArbitraryNode, always returns same applied ArbitraryNode.
It is not an intuitive result.

In short, this issue is to shuffle all ArbitraryNodes found by ArbitraryExpression.

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적용 회수를 입력받는 연산 (limit 을 입력받는 연산)에서 조회한 노드 순서대로 적용하는 게 아니라 랜덤하게 적용하도록 수정합니다.

[sandrawangyx]

Hi @seongahjo, I'm interested in working on this issue.
if it is ok with you, do you mind putting the description in English when you get a chance?
Thank you!

[seongahjo]

@sandrawangyx
Yes, sure.
Thank you for paying attention to good first issue

This issue could be translated as below.

ArbitraryNodes found by expression has fixed ordering.
So applying manipulator with parameter `limit`, which parameter used as limiting the number of applied ArbitraryNode, always returns same applied ArbitraryNode.
It is not an intuitive result.

In short, this issue is to shuffle all `ArbitraryNodes` found by `ArbitraryExpression`.

If you have any question, feel free to ask!
Thank you

[sandrawangyx]

Hi @seongahjo thanks for the comment.
My initial thought on the approach is to re-arrange the tree node.
Let me know if I am on the right track.
we should update the arbitrary tree whenever we update it, is this correct?

[seongahjo]

@sandrawangyx
yes, but I think you should not need to rearrange nodes on tree actually.

Because there are some situations below.
set("*.*", "value" , 5)
"*.*" is hard to refer on tree.

In addition, it is no need to maintain same order.

So I think rearranging nodes found by expression is better.
Feel free to share other opinions.