peekOrNull method

E? peekOrNull()

Returns the top element of the stack without removing it.

Returns null if the stack is empty.

Example:

final stack = LinkedStack<String>();
print(stack.peekOrNull()); // null
stack.push('item');
print(stack.peekOrNull()); // 'item'

Implementation

E? peekOrNull() {
  return _top?.data;
}