Are duplicate keys allowed in the definition of binary search trees?
I’m trying to find the definition of a binary search tree and I keep finding different definitions everywhere. Some say that for any … Read more
data-structures
What would a “frozen dict” be?
A frozen set is a frozenset. A frozen list could be a tuple. What would a frozen dict be? An immutable, hashable dict. … Read more
How do I clear the std::queue efficiently?
I am using std::queue for implementing JobQueue class. ( Basically this class process each job in FIFO manner). In one scenario, I want … Read more
How does the HyperLogLog algorithm work?
I’ve been learning about different algorithms in my spare time recently, and one that I came across which appears to be very interesting … Read more
How to print binary tree diagram in Java?
How can I print a binary tree in Java so that the output is like: 4 / \ 2 5 My node: public … Read more
How are multi-dimensional arrays formatted in memory?
In C, I know I can dynamically allocate a two-dimensional array on the heap using the following code: int** someNumbers = malloc(arrayRows*sizeof(int*)); for … Read more
Get keys from HashMap in Java
I have a Hashmap in Java like this: private Map<String, Integer> team1 = new HashMap<String, Integer>(); Then I fill it like this: team1.put(“United”, … Read more
How is set() implemented?
I’ve seen people say that set objects in python have O(1) membership-checking. How are they implemented internally to allow this? What sort of … Read more
Array versus linked-list
Why would someone want to use a linked-list over an array? Coding a linked-list is, no doubt, a bit more work than using … Read more
Why do we use arrays instead of other data structures?
As I was programming, I haven’t seen an instance where an array is better for storing information than another form thereof. I had … Read more