data-structures Archives

How to check queue length in Python

January 11, 2021 Ollie MC

Question or problem about Python programming: How to check Queue’s length in python?

Using a class as a data container

January 8, 2021 Oceane Wilson

Question or problem about Python programming: Sometimes it makes sense to cluster related data together. I tend to do so with a dict, e.g.,

Difference between tuples and frozensets in Python

January 7, 2021 Bell Jacquise

Question or problem about Python programming: I’m learning Python 3 using The Quick Python Book, where the author talks about frozensets, stating that since sets are mutable and hence unhashable, thereby becoming unfit for being dictionary keys, their frozen counterparts were introduced. Other than the obvious difference that a tuple is an ordered data structure […]

Converting from one struct to another

January 6, 2021 Andrew Rocky

Question or problem in the Swift programming language: I am converting some Objective-C code to Swift code and I have the following problem:

Python is a powerful general-purpose programming language.

How to make heapq evaluate the heap off of a specific attribute?

January 4, 2021 Andrew Rocky

Question or problem about Python programming: I wish to hold a heap of objects, not just numbers. They will have an integer attribute in them that the heap can sort by. The easiest way to use heaps in python is heapq, but how do I tell it to sort by a specific attribute when using […]

Array map vs. forEach in Swift

January 1, 2021 Oceane Wilson

Question or problem in the Swift programming language: In Swift arrays you can do:

How to make a python dictionary that returns key for keys missing from the dictionary instead of raising KeyError?

December 31, 2020 Oceane Wilson

Question or problem about Python programming: I want to create a python dictionary that returns me the key value for the keys are missing from the dictionary.

How to change a value of struct that is in array?

December 31, 2020 Abreonia Ng

Question or problem in the Swift programming language: I’m using swift for my project.

How to pass a Swift struct as a parameter to an Objective-C method

December 31, 2020 Oceane Wilson

Question or problem in the Swift programming language: I have an Objective-C method that accepts a parameter of type id and I want to pass it a Swift struct.

If arrays are value types and therefore get copied, then how are they not thread safe?

December 30, 2020 Oceane Wilson

Question or problem in the Swift programming language: Reading this I learn that: