multidimensional-array

问题 I am trying to write a code in java that would look if all elements in a row and column are the same and print out the indexes of it. So for example if I had two dimensional array of { 1, 0, 0, 0, 0} { 1, 0, 0, 0, 0} { 1, 1, 1, 1, 1} I want to print out 2,0 which means that in the row 2 all the elements are the same and in column 0 all the elements are the same too and they are equal to each other. I was trying to do it with for statements int[][] array_1 = { {1}, {1} }; for(int row=0; row

问题 I am growing a 2D array by it's column and row size in c programming. #include <stdio.h> #include <malloc.h> //#include <conio.h> //#include <stdlib.h> void func(int** p, int d, int** sizes) { static int count = 0; int* item = NULL; int* temp = NULL; if (d == 5) return; *sizes = (int*) realloc(*sizes, (d + 1) * sizeof(*sizes)); *sizes[count] = d + 1; // <=== in second recursive call it throws memory allocation errors here in runtime //p = (int**) realloc(p, (count + 1) * sizeof(int*)); /

问题 I'm trying to extract information from Gmail into Google Spreadsheet. The information in the email has a table structure with the following columns List of Products, QTY Sold and the Subtotal for each product. These repeat N times. When accesing the information using message.getPlainBody() I get the following text: Product Quantity Price Chocolate 1 $8.58 Apples 2 $40.40 Bananas 1 $95.99 Candy 1 $4.99 Subtotal: $149.96 Progress First I tried to use a regular expression to identify each row

问题 I Want to write the code below as Pythonic way, applying mean over two axis. What the best way to do this? import numpy as np m = np.random.rand(30, 10, 10) m_mean = np.zeros((30, 1)) for j in range(30): m_mean[j, 0] = m[j, :, :].mean() 回答1: If you have a sufficiently recent NumPy, you can do m_mean = m.mean(axis=(1, 2)) I believe this was introduced in 1.7, though I'm not sure. The documentation was only updated to reflect this in 1.10, but it worked earlier than that. If your NumPy is too

问题 How to delete a specific row and column from 2D array in C#? int[,] array= {{1,2,3},{4,5,6},{7,8,9}}; lets say I want to delete row i and column i (skipping them) ... for nXn array not just 3x3 and store the remaining array in a new array... so the output would be: {5,6},{8,9} 回答1: There's no built-in way to do that, you can do it yourself: static void Main() { int[,] array = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } }; var trim = TrimArray(0, 2, array); } public static int[,] TrimArray(int

问题 I want to apply skip and limit for paging in nested array of a document how can I perform this [Efficient Way] My Document recored like { "_id":"", "name":"", "ObjectArray":[{ "url":"", "value":"" }] } I want to retrieve multiple document and every document contain 'n' number of record. I am using $in in find query to retrieve multiple record on basis of _id but how can i get certain number of element of ObjectArray in every document? 回答1: You can try like this - db.collection.find({},

问题 I want to apply skip and limit for paging in nested array of a document how can I perform this [Efficient Way] My Document recored like { "_id":"", "name":"", "ObjectArray":[{ "url":"", "value":"" }] } I want to retrieve multiple document and every document contain 'n' number of record. I am using $in in find query to retrieve multiple record on basis of _id but how can i get certain number of element of ObjectArray in every document? 回答1: You can try like this - db.collection.find({},

问题 I have used a MultiDimesional Array as follows string[,] Columns = { { "clientA", "clientB" }} if (Columns.Length != 0) { for (int i = 0; i < Columns.Length / 2; i++) { bulkCopy.ColumnMappings.Add(Columns[i, 0], Columns[i, 1]); } } After code analysis I got warning message as Severity Code Description Project File Line Suppression State Warning CA1814 'Order.GetLastOrderID()' uses a multidimensional array of 'string[,]'. Replace it with a jagged array if possible. I have researched jagged

问题 Is there a way to tell the compiler that I've allocated a memory of size N * M and I wanna treat this pointer as N * M array? In other words, is there a way to write something like this?: int arr[N][M] = (int[N][M])malloc(N * M * sizeof(int)); arr[x][y] = 123; I know that the compiler doesn't know the dimensions of the array, all it knows is that that's a pointer. so my question is: can I somehow tell the compiler that this pointer returned by malloc is an array pointer and it's dimensions

问题 I have a string of month and years: var months= "2010_1,2010_3,2011_4,2011_7"; I want to make this into a 2d array with the year in the first position of each array and the month in the second position. In other words, I want to end up with this: var monthArray2d = [[2010,1],[2010,3][2011,4],[2011,7]]; The way I do this currently is: //array of selected months var monthArray = months.split(","); //split each selected month into [year, month] array var monthArray2d = new Array(); for (var i =