multidimensional-array

问题 I'm trying to dynamically allocate memory for a 2D array inside a function in C++. A question exactly like this has been asked except that it is written using malloc and dealloc, so I was wondering if you could help me convert it to use new and delete. Here is the other question: Allocate memory 2d array in function C I tried changing it to the following code, but I'm getting errors. void assign_memory_for_board(int ROWS, int COLS, int *** board) { *board = new int**[ROWS]; for (int i = 0; i

问题 I am using C# in a console application. I need to load data from a text file and load it into a 2d array. This is what I tried, but when I try to print out the contents of what gets returned nothing gets printed. public static int[,] LoadMap() { const string path = @"1.txt"; string[] fileLines = File.ReadAllLines(path); int[,] map = new int[fileLines.Length, 15]; string line; for (int i = 0; i < fileLines.Length; ++i) { line = fileLines[i]; for (int j = 0; j < line.Length; ++j) { map[i, j] =

问题 I am using C# in a console application. I need to load data from a text file and load it into a 2d array. This is what I tried, but when I try to print out the contents of what gets returned nothing gets printed. public static int[,] LoadMap() { const string path = @"1.txt"; string[] fileLines = File.ReadAllLines(path); int[,] map = new int[fileLines.Length, 15]; string line; for (int i = 0; i < fileLines.Length; ++i) { line = fileLines[i]; for (int j = 0; j < line.Length; ++j) { map[i, j] =

问题 Using C#, I have a 2D Jagged array containing objects, what I want to achieve is to sort this Jagged array based on a public property within these objects I have created a sample below of my problem, I have limited experience with using LINQ, but I have attemped using it and have failed, I have also proceeded to create a swap method if needed. Any insight would be much welcomed, thank you //[][] of Objects private MyObject[][] jaggedArray = new MyObject[3][] { new MyObject[5] { new MyObject()

问题 I have this multidimensional array and I need to merge the fields that are equal and sum the sum values var data = [ [ {field: 123, sum: 100}, {field: 345, sum: 98} ],[ {field: 123, sum: 12}, {field: 345, sum: 20} ] ]; So from this array I need a new one like this. var newArray = [ {field: 123, sum: 112}, {field: 345, sum: 118} ]; and here is my code. var newArray = []; for(var i = 0; i < data.length; i++) { for(var j = 0; j < data[i].length; j++) { var matched = false; for(var c = 0; c <

问题 Say that we have an array A, that has arbitrary dimension dim(A). Say that we have a coordinate index vector V. Is there any way to access the element of A with coordinates V? Doing something like A[V] doesn't work obviously. If V=c(1,2,3) then A[V] will just give us the 1st, 2nd, and 3rd element of A. What if we want A[1,2,3] instead? If we know dim(A) ahead of time, this is easy obviously. But what if we want to make code that works no matter how many dimensions A has? 回答1: We may use do

问题 I have two arrays with the same length in my program, courseGrades and courseCredits, that look something like this: courseGrades[] = {A, A, B, A, C, A}; courseCredits[] = {1, 2, 1, 3, 2, 1}; I want to combine them into one two-dimensional array that would display like this: A A B A C A 1 2 1 3 2 1 How would I do this in Java? Additionally, how would you refer to each element in this array? Sorry for the very simple question, I'm still a beginner at java. 回答1: You can create a Pair class,

问题 I have two arrays with the same length in my program, courseGrades and courseCredits, that look something like this: courseGrades[] = {A, A, B, A, C, A}; courseCredits[] = {1, 2, 1, 3, 2, 1}; I want to combine them into one two-dimensional array that would display like this: A A B A C A 1 2 1 3 2 1 How would I do this in Java? Additionally, how would you refer to each element in this array? Sorry for the very simple question, I'm still a beginner at java. 回答1: You can create a Pair class,

问题 I have a nd python array (not a numpy array) , and it looks something like this [[[1,2,3], [4,5,6]]] I'd like to be able to remove all the unnecessary arrays so that I end up with [[1,2,3], [4,5,6]] And I wrote a function to handle this def remove_unnecessary(array:list) -> list: while True: try: array = *array except TypeError: return array However this doesn't work, and that's mainly due to my lack of knowledge on using starred expressions to unwrap lists. Does anyone have an idea on how I

问题 I have a nd python array (not a numpy array) , and it looks something like this [[[1,2,3], [4,5,6]]] I'd like to be able to remove all the unnecessary arrays so that I end up with [[1,2,3], [4,5,6]] And I wrote a function to handle this def remove_unnecessary(array:list) -> list: while True: try: array = *array except TypeError: return array However this doesn't work, and that's mainly due to my lack of knowledge on using starred expressions to unwrap lists. Does anyone have an idea on how I