multidimensional-array

问题 i have a code that create 2d array using user input and it work fine but now i have 2 questions the first one: how to convert 2d array to 1d array? second question: how to choose or trace the elements above the right diagonal in the 2d array? anyone can help me to fix this code? this my code package question3; import java.util.Arrays; import java.util.Collection; import java.util.Scanner; public class Array2d { public static void main(String[] args) { int[][] matrix = new int[3][3]; int[]

问题 i have a code that create 2d array using user input and it work fine but now i have 2 questions the first one: how to convert 2d array to 1d array? second question: how to choose or trace the elements above the right diagonal in the 2d array? anyone can help me to fix this code? this my code package question3; import java.util.Arrays; import java.util.Collection; import java.util.Scanner; public class Array2d { public static void main(String[] args) { int[][] matrix = new int[3][3]; int[]

问题 If you have this PHP array: $args = array( 'a' => array( 'zebra' => 1, ), 'b' => array( 'zebra' => 0, ), 'c' => array( 'zebra' => 0, ), 'd' => array( 'zebra' => 0, ), 'e' => array( 'zebra' => 1, ), ); Is there a way to algorithmically change the order of this array by the "zebra" key value, but instead of being "incremental" (0,0,0,1,1), they would alternate (0,1,0,1,0). So using the example above, the desired finished array will look like this: $ordered_args = array( 'b' => array( 'zebra' =>

问题 If you have this PHP array: $args = array( 'a' => array( 'zebra' => 1, ), 'b' => array( 'zebra' => 0, ), 'c' => array( 'zebra' => 0, ), 'd' => array( 'zebra' => 0, ), 'e' => array( 'zebra' => 1, ), ); Is there a way to algorithmically change the order of this array by the "zebra" key value, but instead of being "incremental" (0,0,0,1,1), they would alternate (0,1,0,1,0). So using the example above, the desired finished array will look like this: $ordered_args = array( 'b' => array( 'zebra' =>

问题 We have an array and need to sort the above array Array ( [0] => stdClass Object ( [id] => 229 [firstname] => ggg [lastname] => fff ) [1] => stdClass Object ( [id] => 230 [firstname] => aaa [lastname] => jjj ) ) I want to sort the array as (Sort by firstname) Array ( [0] => stdClass Object ( [id] => 230 [firstname] => aaa [lastname] => jjj ) [1] => stdClass Object ( [id] => 229 [name] => ggg [lastname] => fff ) ) 回答1: Use usort: usort($ar, function($a, $b) { return strcmp($a->firstname, $b-

问题 I have a C struct that basically contains two 2D char arrays called List. One for appended items and another for inserted items. Then use external functions that add C strings to these arrays called add_to_array. The problem I'm having is when I call add_to_array once it goes through without issues but once called a second time, I get a segmentation fault. With test code, I discovered for what ever reason that I can't figure out, the 2D array(s) in List remain NULL after calling add_to_array.

问题 In java, multidimensional arrays of objects diclared like this (A is type of object): A[][] array = new A[5][5]; for(int i = 0;i<5;i++){ for(int j = 0;j<5;j++){ array[i][j] = new A(); } } how can I do the same in C++? 回答1: Another idea for a multi dimensional array is if you use std::vector #include <vector> class A{ //Set properties here }; int main(){ //Init vector std::vector<std::vector<A>> array; std::vector<A> tempVec; for(int i = 0;i<5;i++){ for(int j = 0;j<5;j++){ A aValue; //Set

问题 In java, multidimensional arrays of objects diclared like this (A is type of object): A[][] array = new A[5][5]; for(int i = 0;i<5;i++){ for(int j = 0;j<5;j++){ array[i][j] = new A(); } } how can I do the same in C++? 回答1: Another idea for a multi dimensional array is if you use std::vector #include <vector> class A{ //Set properties here }; int main(){ //Init vector std::vector<std::vector<A>> array; std::vector<A> tempVec; for(int i = 0;i<5;i++){ for(int j = 0;j<5;j++){ A aValue; //Set

问题 I have passed one multi-dimensional array to another activity using putSerializable() and retrieve using getSerializable. But I got some problems. Please help me to solve my problem.. First activity: String [][] selected_list= new String[10][]; Bundle list_bundle=new Bundle(); list_bundle.putSerializable("lists",selected_list); Intent list_intent= new Intent(v.getContext(), second_activity.class); list_intent.putExtras(list_bundle); startActivityForResult(list_intent, 2); Second Activity:

问题 Hi and thank you very much for your help. I'm new to swift and have thoroughly researched the other answers but they all are not working for me. I have sample data in the format: ["10-24-2015", "124", "Yes", "No", "No", "Yes", "Yes", "NA", "NA"] There are only 3 entries with varying dates and values and they're all in a master array. It's been written to a file already and so I start my code below from a loaded file. All I would like to do is to sort the arrays by date which is the first