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Questions tagged [sub-array]

A sub-array is a subset of an array.

434 questions
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Creating Boggle game - linking coordinates to letters

There is a 4x4 board with a total of 16 letters. In this array [2,1] represents the letter in the third row, second column. const coordPairs = [ [ [2, 1], [4, 1] ] [ [4, 0], [4, 1], [4, 2], [4, 3] ] [ [0, 0], [0, 1], [0, 2] ], [ [1, 0], [3,…
kalecrush
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PHP usort array based on subarray elements not working right - buggy?

Here's my current code, using php 7.1.20-1+ubuntu18.04.1+deb.sury.org+1: (Four columns to sort by, 5th column just a subarray reference number.) $dud = [[2,3,"2018-07-19","08:23",1], [2,3,"2018-07-19","08:30",2], …
Everett Staley
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php if array has another array

Seems weird matter. Is there any way to detect array that contains sub-array in php, such parent-child concept in css, jquery. I want to insert data only if array has subarray Dynamic Menu
  • Dipak
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    MPI - Difference between mpi_type_get_extent and mpi_type_get_true_extent

    I have some problem in understanding the difference between mpi_type_get_extent and mpi_type_get_true_extent. In practice, I was using the former, expecting the results I then obtained with the latter, so I checked the MPI 3.1 Standard, where I…
    Enlico
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    what's the difference between np.array[:,0] and np.array[:,[0]]?

    I have a numpy array cols2: print(type(cols2)) print(cols2.shape) (97, 2) I was trying to get the first column of this 2d numpy array using the first code below, then i got a vector instead of my ideal one column of data.…
    Pumpkin C
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    Maximum submatrix (2D) by ignoring at most one element

    I know the algorithm to find the maximum 2D submatrix is O(m^2*n) with the use of Kadane's algorithm, where m is the columns and n is the rows. But is there an algorithm for finding the maximum 2D submatrix if we have to ignore exactly 1 element in…
    Alex Borgue
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    How to insert array elements as sub array like first element is the parent of second,second is the parent of third and so on?

    I need to convert an array that is like $data = array('Image','Thumbnail','size') to $data= array('Image'=>array('Thumbnail'=>array('size'=>'test'))); format. How it will be possible?. I had tried something like below. $count=…
    Sujith Johnson
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    Possibly simpler O(n) solution to find the Sub-array of length K (or more) with the maximum average

    I saw this question on a coding competition site. Suppose you are given an array of n integers and an integer k (n<= 10^5, 1<=k<=n). How to find the sub-array(contiguous) with maximum average whose length is more than k. There's an O(n) solution…
    user1968919
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    Find maximum non contiguous subarray that respect a specific rule

    Given these two arrays: [5, 3, 4, 1, 2] [1, 3, 2, 4, 5] Find the maximum subsequence in both arrays that the index of the elements are in a crescent order: Example: [3, 4] it's an answer because the indexes are in a crescent way in both arrays.…
    Emanuel Huber
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    C - Debugging a particular sub array of 2D arrays

    I am writing a C program in VS 2013 and I want to debug a particular sub-array from full 2D matrix of ints. For example, using debugger watch window, I can print like, Mat // this shows the full NxM Mat matrix values Mat[i][j] // this shows…
    Sazzad Hissain Khan
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    Many Subarray Sum Queries

    Subarray problem: Given integer array A (only positive numbers), is there a continuous subarray of any length with sum S? Sliding window solution to this is O(N). Now if we have many such queries S on static array, we can do preprocessing. We can…
    Filip Nguyen
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    Split array by list of sub-array indices

    Suppose I have an array X and a list of indices k_ar, the maximum of which is K - 1. What I want to do is basically split X in such a way that X[i] goes into sub-array k_ar[i]. The O(n) way to do this would be the following: X = [5, 1, 3, 2, 2,…
    Hameer Abbasi
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    Subarrays not working in Swift 3

    In Swift 3 I have two variables declared like this: let patternArray = [true,true,false,true,true,false,true,true] var resultArray = [Bool]() Later in my code I have this, to get part of the array: resultArray = patternArray [0..<4] Whe compliling…
    Michel
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    Algorithm that finds the start and the finish of many sub-arrays?

    so I have this question in C: Given an array that only contains 0's and 1's (Example: [1,1,0,0,0,0,1,0,1,0,1,1]). I need to find the start of a "ring interval" and the finish of the same "ring interval" (there could be many rings like that, we'll…
    Buk Lau
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    How to create sub-array in array in mongodb using C code?

    I'm working on project where i have to prepopulate array. I need to update this function so that arrays 'time' and 'values' become arrays with sub-arrays full of '0' but i can't figute it out how am i suppose to do this. I'll be grateful for any…
    Xander
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