The answer is: u[0] = 6, u[1] = 9, u[2] = 12 I will explain how the loop goes. for (int i = 0; i < u.length; i++){ u[i] = b[0][i]; for (int j = 1; j < b.length; j++) u[i] += b[j][i]; } First loop: outer for loop: u[i] = b[0][i]; –> u[0] = … Read more
You mean like this?: $array = array( array(‘id’ => 1, ‘status’ => -1), array(‘id’ => 2, ‘status’ => 1), array(‘id’ => 3, ‘status’ => 2), array(‘id’ => 4, ‘status’ => 2), array(‘id’ => 5, ‘status’ => 2) ); $statuses = array(); foreach($array as $one){ if(!isset($statuses[$one[‘status’]])){ $statuses[$one[‘status’]] = 0; } $statuses[$one[‘status’]]++; } $newArray = array(); foreach($statuses … Read more
Here’s what I’ve got, took me a while but this will do what I was looking for: it takes each combination of the arrays (t1, t2, t3, t4) and adds their elements and returns whatever combinatorial you choose for n, (in this example i left it as 3). If there’s any more optimizations you can … Read more
Assuming you have the number of rows “r” and the number of columns “c”, you can do this: int **arr; arr = malloc(r*sizeof(int*)); for(int i=0; i < r; i++) { arr[i] = malloc(c*sizeof(int)); } this dynamically allocates an array of pointers to integers, and then allocates arrays of integers to each pointer. Don’t forget to … Read more
foreach($specials as $val) { foreach($val as $key => $valData) { // $key is now either ‘word’ or ‘digit’ foreach($valData as $value) { echo “<div class=”$key”>$value</div>”; } } } 12 solved PHP Specials foreach multidimensional array
A three dimensional vector follows the same format that a 2 dimension vector has. If A, B, C … are defined as std::vector<std::vector<double> > A (6,std::vector<double>(6)); Then their type is std::vector<std::vector<double> >. To create a vector that will hold 8 of those then you need to use std::vector<std::vector<std::vector<double>>> someName(8); If you want to have the … Read more
I think that you needed string, not 2D-Array. You can be written out to a string like write to the standard output by implementing a string that a simple extension. #include <stdio.h> #include <stdlib.h> #include <string.h> typedef struct char_vec { char *v; size_t capacity; size_t used; } sstream; sstream *ss_new(void); void ss_free(sstream *ss); void ss_putc(sstream … Read more
string snack2[][]=new string[Math.Round(snacks.Length/2)][2]; int cnt=0; for(int i=0;i<Math.Round(snacks.Length/2);i++) { for (int j=0;j<2;j++) { snacks2[i][j]=snack[cnt++]; } } 3 solved How To convert 1D array to 2D array in C# [closed]
In the line char ** domain[] = new char * [rows]; char ** domain[] tries to make an array of char **. If the compiler didn’t complain about not having a valid array size in the [] and you would have a 3D structure. You want just plain old char ** for a 2D structure, … Read more
A little helper makes life easier: public static JSONArray jsonArray(Object… values) { JSONArray arr = new JSONArray(); arr.addAll(Arrays.asList(values)); return arr; } Then: JSONObject obj = new JSONObject(); obj.put(“data”, jsonArray(jsonArray(“1”, “YES”, “sp_1”, “1”, “xxx”), jsonArray(“2”, “NO” , “sp_2”, “2”, “yyyy”), jsonArray(“3”, “YES”, “sp_3”, “2”, “zzzz”))); System.out.println(obj.toJSONString()); Output {“data”:[[“1″,”YES”,”sp_1″,”1″,”xxx”],[“2″,”NO”,”sp_2″,”2″,”yyyy”],[“3″,”YES”,”sp_3″,”2″,”zzzz”]]} 1 solved create a JSON file in java … Read more
int column=1; //in your example int row=1;//in your example //for rows for(int i = 0; i<numberofrows; i++) { array[i][column]=0; } //for columns for(int i = 0; i<numberofcolumns; i++) { array[row][i]=0; } 1 solved How to zero specific column of 2d array [closed]
Python does not have arrays like in C, unless you install the Numpy library (which I recommend if you are trying to work mathematical and numerical processing problems). Numpy is not necessary to solve this problem. If you want a 2D array you can use nested lists: each row is a list, like this: board … Read more
You may want to pass a single dimension array: bool latin(int const * const arr, unsigned int capacity) { int counter = 0; int s; // Please initialize this. for (int row = 0; row < MAXIMUM_ROWS; ++row) { for (int column = 0; column < MAXIMUM_COLUMNS; ++column) { const int value = *(arr + … Read more
An external frame means that you have to add two rows/columns each (left and right/ upper and lower), so you need to increase the size of your new matrix by an additional row and column. The loops for setting the frame to 0 were fine. At the last inner loop you set the reduced size … Read more
Because there is no value set in int a,b, int ArrayA[a][b] doesn’t do whatever you expected it to do. Give a and b some value, like int a=2, b=2 or something, then it will work. 1 solved c++ Multidimensional array second row overwriting the first row