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data-structures

Are duplicate keys allowed in the definition of binary search trees?

by IT Nursery

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

Tags binary-tree, computer-science, data-structures

What would a “frozen dict” be?

by IT Nursery

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

Tags data-structures, dictionary, immutability, python

How do I clear the std::queue efficiently?

by IT Nursery

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

Tags c, data-structures, queue, stl

How does the HyperLogLog algorithm work?

by IT Nursery

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

Tags algorithm, data-structures, database, hyperloglog, math

How to print binary tree diagram in Java?

by IT Nursery

How can I print a binary tree in Java so that the output is like: 4 / \ 2 5 My node: public … Read more

Tags binary-tree, data-structures, java, printing

How are multi-dimensional arrays formatted in memory?

by IT Nursery

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

Tags arrays, c, data-structures, memory, stack-memory

Get keys from HashMap in Java

by IT Nursery

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

Tags data-structures, java, java-6

How is set() implemented?

by IT Nursery

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

Tags cpython, data-structures, python, set

Array versus linked-list

by IT Nursery

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

Tags arrays, data-structures, language-agnostic, linked-list

Why do we use arrays instead of other data structures?

by IT Nursery

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

Tags arrays, data-structures
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