All Questions
29 questions
2
votes
1
answer
106
views
Swift: Find neighbor-elements within an array
I need a function which finds the left and right neighbor-element within an integer-array, based upon a given index. If the given element is 0, then it shall return largest index as left neighbor. ...
- 5,022
4
votes
1
answer
106
views
Swift Arrays: Write a rotate-right function
Task:
Write a function which rotates all elements of a given array to the right.
Example: [1, 2, 3] => [3, 1, 2]
My solution:
...
- 5,022
3
votes
1
answer
177
views
Swift - efficient array searching
I am trying to find a way to search an Int array (all numbers are > 0) and identify sequences where the sum of each element is a specific number. One element can ...
- 179
5
votes
3
answers
295
views
3
votes
2
answers
436
views
Optimize Leetcode 239. Sliding Window Maximum using Swift
LeetCode problem 239. Sliding Window Maximum
You are given an array of integers nums,
there is a sliding window of size k which ...
- 253
3
votes
1
answer
343
views
Unwrapping optionals for max of a 2D array in swift
I'm working in swift and I've got a custom class Array2D to handle fixed-width, two-dimensional arrays of integers. What I'm trying to do is write a simple, ideally-...
- 133
4
votes
1
answer
1k
views
Find minimum count of items where sum of them is X from an array
I recently faced an interview question where you have to find minimum needed items from an array that can added together to generate X value.
For example giving:
<...
- 143
3
votes
2
answers
4k
views
Working with Arrays in Swift
It's an exercise from a Swift-course I'm currently taking.
You are given an array of integers. Make an additional array named
computedNumbers. computedNumbers should multiply each element in the
...
- 5,022
3
votes
1
answer
1k
views
Swift function to find a specific set of combinations of 3 digits within a larger integer array
I asked this question on Stack Overflow and was directed here. I'm working on a function that will help me quickly find all the upper structure triads (3-note chord) that I can add to a 4-note 7th ...
- 133
3
votes
3
answers
506
views
Efficient way of flat mapping a range of a multidimensional random access collection
I've recently answered a question about reading elements from an array of arrays. A way it could be interpreted is that the OP wanted to read a range that could span over multiple subarrays of the 2D ...
- 889
1
vote
2
answers
1k
views
A scalable way to remove duplicates from Arrays without extensions in Swift 4
This method is an attempt at removing duplicates from arrays without the use of extensions.
...
user184635
4
votes
1
answer
2k
views
Swift - Finding longest binary gap of a given integer
I recently had the chance to try Codility's algorithm training, and the very first one in the list is finding the longest binary gap of a given integer.
I tried to implement this in Swift, and after ...
- 227
4
votes
1
answer
165
views
"What To Do" App
I am starting to build up my portfolio, so I am starting to build projects whenever an idea pops up in my head. So, I decided to build an app that helps you decide what to do. Basically how it works ...
4
votes
2
answers
469
views
Initializing an Array of Alternating Values
My goal in this project is to make something that can—as, quickly, effectively, and efficiently as Array(repeating: , count: )—initialize an ...
- 281
7
votes
1
answer
14k
views
Grouping Date Objects by year and month
I have an array of date objects, which I want to group by year and month. The data structure I have chosen for my target is an array of arrays of Date objects.
Two Date objects should be in the same ...
- 617