N-Puzzle | An app that let 's you play the N-Puzzle game | Game Engine library

i am trying to combine two arrays, i tried this:
const admin_navigation = [...AdminNav, ...initialNav] - not working right its over writing one array
i also tried, const admin_navigation = AdminNav.concat(initialNav); - give me an error (TypeError: AdminNav.concat is not a function)

what i am trying to create is one array that combine both arrays into one like the bottom example.

=== Array 1 ===

I am making a n-puzzle solver for my Artificial Intelligence class using A* in Python. The problem I have with my solution is , that the solve_puzzle() is not working as it should. While searching through the nodes it gets just deeper and deeper, but it never ends, the depth goes into really high numbers (depth of some child node is 5k for example).

I think it gets stuck in some loop and it keeps just looping through the same nodes (That is just what I think, I am not sure about that). I don't really know, I tried 3 different A* solutions, but the result is the same - the search loop never ends and never reaches the Goal.

I can solve very primitive puzzle like
start -> 0, 1, 2, 3, 4, 5, 6, 7, 8
goal -> 1, 2, 0, 3, 4, 5, 6, 7, 8 (just two moves to left are made)
but for just a little more complex puzzle like
start = 0, 1, 2, 3, 4, 5, 6, 7, 8
goal = 1, 2, 5, 0, 3, 4, 6, 7, 8 it is a never ending search.

I move the tile with number, not the blank tile.

Below is the whole code:

When I go browser then 'Active session' menu is by default open, I want to it's open when I click on 'Active session' menu. Found in the debugging, I need to remove 'open' class on default. Please see my below code and screenshot and please suggest me, Thanks. I'm using below code for showing menu.

DefaultLayout.js: