multidimensional-array

问题 Sir, I am confused what should be exact title of this issues. Below is my problem I have a multidimensional array like below Array ( [0] => Array ( [0] => 2017-11-01 [1] => 9 Am ) [1] => Array ( [0] => 2017-11-02 [1] => 07 Pm ) [2] => Array ( [0] => 2017-11-03 [1] => 11 Pm ) [3] => Array ( [0] => 2017-11-04 [1] => 03 Pm ) [4] => Array ( [0] => 2017-11-01 [1] => 11 Am ) [5] => Array ( [0] => 2017-11-02 [1] => 05 Pm ) ) Now, I want to make unique date beside time should be into another array. I

问题 This question already has answers here : Return a 2d array from a function (3 answers) Return a 2d array from a function (9 answers) Closed 6 years ago . I have looked for this for quite sometime but haven't found a satisfactory solution. How do I return a double dimensional array in a C function? float **KE() { float K[2][2]={{1,2},{3,4}}; return K; } For the above code, I get the error error: cannot convert 'float<*>[2]' to 'float**' in return 回答1: Put it in a struct: struct dar { float

问题 Im working with a sparse matrix and im given a text file like this: 0 3 1.2 2 5 3.2 3 0 2.1 3 5 4.2 4 5 2.2 0 0 5.2 Basically the way it works is the number 1.2 goes on the position [0] [3] and the elements of the matriz that are not mentioned stay at 0, so in this case it should look like this: 5.2 0 0 1.2 0 0 0 0 0 0 0 0 0 0 0 0 0 3.2 2.1 0 0 0 0 4.2 0 0 0 0 0 2.2 回答1: OP wrote this in the comments: Im so sorry but my teacher clarified everything just now... it turns out that, for each line

问题 I was wondering if it was possible to print a 2D array in C like it is in python. For example, if I have int array1[10][10]; then fill in the array then printf("%li", array1) does not seem to work. In C, is there something like printf that can print array1 as [1, 2, 3, 4] ? in python it would just be print(array1) 回答1: Unfortunately, there is no standard way to do that. The way to print your array would be: int array1[] = {1, 2, 3, 4}; size_t i = 0; for (i = 0; i < 4; i++){ printf("%d ",

问题 At the moment I can only output data of a specific key (index) with console.log(auction[index].id); but I need the data using console.log(auction.id); . How do I accomplish this? I'm using nodejs and my WebSocket receives data just like this: 42["stream",{"streamArray":[[{"id":20,"pid":2,"nr":4,"price":5.73,"pe":506.08,"duration":14,"hb":361262},{"id":23,"pid":17,"nr":4,"price":5.59,"pe":189.13,"duration":7,"hb":null},{"id":12,"pid":8,"nr":3,"price":5.59,"pe":90.23,"duration":7,"hb":null}]]}]

问题 At the moment I can only output data of a specific key (index) with console.log(auction[index].id); but I need the data using console.log(auction.id); . How do I accomplish this? I'm using nodejs and my WebSocket receives data just like this: 42["stream",{"streamArray":[[{"id":20,"pid":2,"nr":4,"price":5.73,"pe":506.08,"duration":14,"hb":361262},{"id":23,"pid":17,"nr":4,"price":5.59,"pe":189.13,"duration":7,"hb":null},{"id":12,"pid":8,"nr":3,"price":5.59,"pe":90.23,"duration":7,"hb":null}]]}]

问题 Have this code: $text = '{"token_name":"C_ROOT","token_group":"C_BLOCK","group":true,"body":[[{"token_name_org":"T_VARIABLE","token":320,"value":"sort","line":2,"token_group":"VARIABLES","token_name":"C_VARIABLE"},{"token_name_org":"C_ASSIGNMENT_EQUAL","line":2,"value":"=","token":"VALUE","token_group":"ASSIGNMENTS"},{"token_name_org":"T_VARIABLE","token":320,"value":"_GET","line":2,"token_group":"VARIABLES","token_name":"C_VARIABLE","args":[[{"token_name_org":"T_CONSTANT_ENCAPSED_STRING",

问题 I have an array with this structure: $grades = array( 'Grade 1' => array( 'title' => 'Grade 1 Class', 'students' => 5, 'teacher' => 'Smith', ), 'Grade 2' => array( 'title' => 'Grade 2 Class', 'students' => 5, 'teacher' => 'Smith', ), 'Grade 3' => array( 'title' =>'Grade 3 Class', 'students' => 8, 'teacher' => 'John', ), 'Grade 4' => array( 'title' =>'Grade 4 Class', 'students' => 8, 'teacher' => 'John', ), 'Grade 5' => array( 'title' =>'Grade 5 Class', 'students' => 8, 'teacher' => 'John', ),

问题 I am trying to change a value in the Object[][] data in a defaultTableModel but I am getting a nullpointerexception at if (data[i][j] == userFolderName) I have tried changing the variable to "Kathy" just in case it wasn't reading the userName correctly but it still throws the exception. Can you please have a look at my code and see where I'm going wrong? public class Statistics extends JPanel { public Object[][] data; public DefaultTableModel model; public Statistics() { super(new GridLayout

问题 I am trying to change a value in the Object[][] data in a defaultTableModel but I am getting a nullpointerexception at if (data[i][j] == userFolderName) I have tried changing the variable to "Kathy" just in case it wasn't reading the userName correctly but it still throws the exception. Can you please have a look at my code and see where I'm going wrong? public class Statistics extends JPanel { public Object[][] data; public DefaultTableModel model; public Statistics() { super(new GridLayout