What is the principle of implementing a stack in Golang…

In the Go language, a stack is a data structure implemented based on arrays or slices, following the Last-In-First-Out (LIFO) principle. The implementation principle of a stack mainly includes the following points:

1. In Go language, you can implement a stack using arrays or slices. Arrays need a fixed size when created, while slices can dynamically resize as needed.
2. Top pointer: the stack internally maintains a top pointer that points to the top element of the stack. Initially, the stack is empty, and the top pointer points to -1 (for array implementation) or nil (for slice implementation).
3. Push operation: place the new element at the position pointed to by the top of the stack pointer, then increment the stack pointer to point to the new top element.
4. Pop operation: remove the top element from the stack and decrement the top pointer to point to the next top element.
5. Checking if the stack is empty: By examining if the top pointer is -1 (for array implementation) or nil (for slice implementation), we can determine if the stack is empty.
6. Stack full check (array implementation): when the number of elements in the stack reaches the maximum capacity of the array, it is considered as a full stack. In the case of a stack implemented using slices, there is typically no full stack situation because it can dynamically expand.

In summary, the stack implementation in Go primarily uses arrays or slices to store data, and controls push and pop operations through a stack pointer. The size of the stack is determined by the size of the array or slice, and can be dynamically resized as needed.