A sub-array is a subset of an array.
Questions tagged [sub-array]
434 questions
2
votes
2 answers
Swift: Mutating array in struct
I am trying to create a Matrix class in Swift but I am getting an error on the self.data[row * columns..<(row + 1) * columns] = data line in my setRow() function. The error is 'Cannot assign value of type '[Double]' to type 'ArraySlice''
struct…
BenJacob
- 957
- 10
- 31
2
votes
2 answers
how to check if any subarray doesn't contain an item from other subarray? Ruby
I have an array
animals = [
[{"name" => "Alex", "spices" => "dog", "vname" => "colour", "value" => "black"},
{"name" => "Alf", "spices" => "dog", "vname" => "colour", "value" => "white"},
{"name" => "Sonia", "spices" => "dog", "vname" =>…
ag.lis
- 31
- 1
2
votes
4 answers
How to add subarrays to itself? Ruby
I have an array containing of subarrays like this:
arr = [[{"big" => "2055", "small" => -"-10", "thin" => "i"},
{"big" => "2785", "small" => "0", "thin" => "l"}],
[{"big" => "7890", "small" => "3", "thin" => "t"},
{"big" =>…
mia102aim
- 103
- 1
- 7
2
votes
4 answers
Group 2d array by column, preserve multiple other column values and push 2 column values into subarrays
I have a array with repeated values like this:
[
[
'id' => 112,
'name' => 'John',
'country' => 'Spain',
'age' => 24,
'company' => 'One',
'price' => 10
],
[
'id' => 112,
…
kurtko
- 1,978
- 4
- 30
- 47
2
votes
2 answers
How to rearrange an array by subarray elegantly in numpy?
Let's say I have a 3-D array:
[[[0,1,2],
[0,1,2],
[0,1,2]],
[[3,4,5],
[3,4,5],
[3,4,5]]]
And I want to rearrange this by the columns:
[[0,1,2,3,4,5],
[0,1,2,3,4,5],
[0,1,2,3,4,5]]
What would be an elegant python numpy code for doing…
StatsNoob
- 360
- 1
- 5
- 15
2
votes
2 answers
Filter subarrays in an array
I must be losing my mind. Suppose I have an array of arrays. I want to filter the subarrays and end up with an array of filtered subarrays. Say my filter is "greater than 3". So
let nested = [[1,2],[3,4],[5,6]]
// [[],[4][5,6]]
After some…
rswerve
- 169
- 1
- 3
- 7
2
votes
2 answers
How do I print the number of negative subarrays from a given array?
Problem Statement:
Given an array of n integers, find and print its number of negative subarrays on a new line.(A subarray is negative if the total sum of its elements is negative.)
Sample Input
5
1 -2 4 -5 1
Sample Output
9
Result that my code…
Ganesh Ramachandran
- 140
- 2
- 8
2
votes
2 answers
Boolean expression for if list is within other list
What is a efficient way to check if a list is within another list? Something like:
[2,3] in [1,2,3,4] #evaluates True
[1,5,4] in [5,1,5,4] #evaluates True
[1,2] in [4,3,2,1] #evaluates False
Order within the list matters.
Sarah Pierson
- 149
- 10
2
votes
2 answers
Range of maximum product subarray (Kadane algorithm variant)
I have been trying to get the range of a Maximum Product of a subarray (studying for job interviews).
This has been already asked here (but no valid answers have been provided).
Getting range of max product subarray using Kadanes algorithm
The…
Sanjay
- 23
- 5
2
votes
2 answers
Split array based on sum of the values of each element
Suppose the elements of an input array are arranged in ascending order, as in this sample:
int[] a= {23,24,25,30,34,36,40,41,43,45,50};
I need to split the array into different sub-arrays. Each sub-array will contain elements such that their sum…
ramansingh
- 45
- 8
1
vote
2 answers
Ruby - split and rename subarrays
As the title says... if I have an array containing subarrays is it possible to split the array and rename the new split arrays? I know I could simply type new_array=array[0] and so on but the problem is that the original array containing the sub…
JoMojo
- 404
- 1
- 7
- 22
1
vote
0 answers
Subarray XOR having odd number of set bits
How can I find the number of subarrays where bitwise XOR of the element of the subarray has odd number of set bits.
Basically I need to find the solution in linear time. I could solve in O(N^2).
What concept is required to solve this problem?
Snehasish Bhakat
- 11
- 2
1
vote
3 answers
How to get the arrays not contained in another array?
I have two Python arrays with arrays inside:
first = [[0,10],[0,11],[0,12],[0,13]]
second = [[0,10],[0,11]]
and I want to get as a result the array that is in the first one, but not in the other:
difference(first,second)
#returns…
BSDash
- 13
- 2
1
vote
2 answers
Count subarrays in A with sum less than k
For the question below:
Given an array A of N non-negative numbers and a non-negative number B,you need to find the number of subarrays in A with a sum less than B.
I have found 2 solutions:
Brute force:
let count = 0;
for (let i=0; i
Ashy Ashcsi
- 1,529
- 7
- 22
- 54
1
vote
1 answer
Sumproduct of sub-arrays in excel
I need to find a performant and smart way to redesign the formula or the tables on which it depends (COSTO_DUMMY and GG_TARGET). Can you help me, please? I can add new support tables if…
Franco
- 87
- 9