/// 取出栈底的数 func getAndRemoveLastElement(_ items: inout [Int]) -> Int { let value = items.remove(at: 0) if (items.isEmpty) { return value } let last = getAndRemoveLastElement(&items) items.insert(value, at: 0) return last } func reverse(_ items: ino…
栈操作时遇到一个问题 getFragmentManager().beginTransaction() .replace(R.id.fl_container,bFragment) .addToBackStack(null).commitNowAllowingStateLoss(); 抛出异常: java.lang.IllegalStateException: This transaction is already being added to the back stack at androidx.…
直接上代码: class ArrayStack{ //用数组模拟栈 int maxSize; int[] stack; int top = -1;//表示栈顶 public ArrayStack(int maxSize) { this.maxSize = maxSize; this.stack = new int[maxSize]; } //1, 入栈 public void pushStack(int value){ //判断是否满 if(IsFull()){ System.out.print…