multidimensional-array

问题 my problem is quite simple. When using MPI_Sendrecv, its generates systematically a segfault. I had the same problem earlier with the use of 2D array and a basic MPI_Send but finally solved it. As I tried the same solution that work in the last case, this did not change anything. Thus I'm asking help ! So basically, I allocate all my matrix by this code : double** allocateMatrix(int rows, int cols) { double **M; // Row pointer double *Mdata; // Where data will be actually storde M = calloc

问题 I have two 2D arrays, I want to compare them using JavaScript, ignore the matches and if there are mismatches to return the entire row into a new array. var array1 = [ ['52a1fd0296fc','DEF'], ['52a1fd0296fc','DEF'], ['52a1fd0296fc','DEF'], ['52a1fd0296fc','DEF'], [null,'ABC'], ['6f93cfa0106f','xxx'], ]; var array2 = [ ['52a1fd0296fc','ABC'], ['6f93cfa0106f','xxx'], ['52a1fd0296fc','ABC'], ['52a1fd0296fc','ABC'], ['52a1fd0296fc','DEF'], ['52a1fd0296fcasd','DEF'], ]; I want to take this output,

问题 I have a single array populated with some values that I receive from another method, and I want to populate a bidimensional array with values from the first, example: int[] singleArray; // there's no values here to demonstrate, // let's think that's populated int[][] bidimArray = new int[80][80]; for (int i = 0; i < 80; i++) { for (int j = 0; j < 80; j++) { for (int x = 0; x < singleArray.length; x++) { bidimArray[i][j] = singleArray[x]; } } } I thought in the solution above, besides it seems

问题 Please help, I'm having trouble how to sort Array of Strings in two columns. So, I have two columns: Both of it contains a string. I need to sort the first column in alphabetical order while the second column should not shuffle, thus, it should correspond to the first column after sorting. Can anyone see where I need to put sorting method in my code below: public static void main(String[] args) { String[][] emp = { {"Victor ", "ZSA"}, {"Fred ", "HAN"}, {"Drake ", "SOL"}, {"Albert ", "TUR"}, {

问题 Please help, I'm having trouble how to sort Array of Strings in two columns. So, I have two columns: Both of it contains a string. I need to sort the first column in alphabetical order while the second column should not shuffle, thus, it should correspond to the first column after sorting. Can anyone see where I need to put sorting method in my code below: public static void main(String[] args) { String[][] emp = { {"Victor ", "ZSA"}, {"Fred ", "HAN"}, {"Drake ", "SOL"}, {"Albert ", "TUR"}, {

问题 My array is of type [[Int]] array = [[1,2,3], [4,5,6], [7,8,9,10], [11,12,13], [14,15,16]] I want the transpose result as: array = [[1,4,7,11,14], [2,5,8,12,15], [3,6,9,13,16], [0,0,10,0,0]] How to pad 0's to an array which does not have an equal row or column mapping. I want the transpose to work for both rows and columns with unequal mapping elements. Please help. 回答1: Here is an implementation that does what you want: func transpose(_ input: [[Int]]) -> [[Int]] { let columns = input.count

问题 I am working with PHP cUrl to query a form. It does a POST query, so I am using an associative array. This is what the form looks like: <form action="form.php" method="POST"> ... <input type="hidden" name="var" value="value1"> <input type="hidden" name="var" value="value2"> <input type="hidden" name="var" value="value3"> <input type="hidden" name="var" value="value4"> <input type="hidden" name="var" value="value5"> ... </form> While doing my cUrl query, I have the following code: $postfields

问题 I need to group my multidimensional array by dates. For example: Array ( [0] => Array ( [product_id] => 52 [date] => 2017-07-28 ) [1] => Array ( [product_id] => 53 [date] => 2017-07-30 ) [2] => Array ( [product_id] => 123 [date] => 2017-07-30 ) ) I need this result: Array ( [2017-07-30] => Array ( [0] => Array ( [product_id] => 123 [date] => 2017-07-30 ) [1] => Array ( [product_id] => 53 [date] => 2017-07-30 ) ) [2017-07-28] => Array ( [product_id] => 52 [date] => 2017-07-28 ) ) This is my

问题 My goal for this is to be able to access properties of a nested array in a for loop, for example given the array. [[1 , "one"], [0.2 , "two"], [0.3 , "three"]] I'd like to be able to access index 0 over a loop. My current way of doing this is: function printArray() { for (var i = arguments.length; i >= 0; i--) { print(arguments[i][0]); } } How ever this produces this error Uncaught TypeError: Cannot read property '0' of undefined When I expected 0.3 0.2 1 What is the correct way of looping

问题 How can I group by Source and date then SUM Pageviews and revenue this array below Array ( [0] => Array ( [Source] => Analytics [Date] => 2017-10-31 [Source] => Google [visits] => 6000 [Pageviews] => 12,214 [Revenue] => 25 ) [1] => Array ( [Source] => Analytics [Date] => 2017-10-31 [Source] => Google [visits] => 600 [Pageviews] => 1015 [Revenue] => 10 ) [2] => Array ( [Source] => Analytics [Date] => 2017-10-31 [Source] => Facebook [visits] => 600 [Pageviews] => 1144 [Revenue] => 40 ) [3] =>