I need a Stack data structure for my use case. I should be able to push items into the data structure and I only want to retrieve the last item from the Stack. The JavaDoc for Stack says : A more complete and consistent set of LIFO stack operations is provided by the Deque interface … Read more
What is stack unwinding? Searched through but couldn’t find enlightening answer! 12 Answers 12
I need to add elements to an ArrayList queue whatever, but when I call the function to add an element, I want it to add the element at the beginning of the array (so it has the lowest index) and if the array has 10 elements adding a new results in deleting the oldest element … Read more
I have the following piece of code which fails with the following error: RuntimeError: maximum recursion depth exceeded I attempted to rewrite this to allow for tail recursion optimization (TCO). I believe that this code should have been successful if a TCO had taken place. def trisum(n, csum): if n == 0: return csum else: … Read more
I am executing my a.out file. After execution the program runs for some time then exits with the message: **** stack smashing detected ***: ./a.out terminated* *======= Backtrace: =========* */lib/tls/i686/cmov/libc.so.6(__fortify_fail+0x48)Aborted* What could be the possible reasons for this and how do I rectify it? 10 Answers 10
In Android I have some activities, let’s say A, B, C. In A, I use this code to open B: Intent intent = new Intent(this, B.class); startActivity(intent); In B, I use this code to open C: Intent intent = new Intent(this, C.class); startActivity(intent); When the user taps a button in C, I want to go … Read more
Suppose we have two stacks and no other temporary variable. Is to possible to “construct” a queue data structure using only the two stacks? 21 Answers 21
alloca() allocates memory on the stack rather than on the heap, as in the case of malloc(). So, when I return from the routine the memory is freed. So, actually this solves my problem of freeing up dynamically allocated memory. Freeing of memory allocated through malloc() is a major headache and if somehow missed leads … Read more
This question may sound fairly elementary, but this is a debate I had with another developer I work with. I was taking care to stack allocate things where I could, instead of heap allocating them. He was talking to me and watching over my shoulder and commented that it wasn’t necessary because they are the … Read more
Why is Java Vector considered a legacy class, obsolete or deprecated? Isn’t its use valid when working with concurrency? And if I don’t want to manually synchronize objects and just want to use a thread-safe collection without needing to make fresh copies of the underlying array (as CopyOnWriteArrayList does), then is it fine to use … Read more
