arrays

问题 I'm doing program where I enter the number from keyboard. Then 2d array is created, and it's filled in spiral order till this number. All elements after the number will be equal to 0; The function fills the array in spiral order (to right -> down -> left -> up). Code is: #include <stdio.h> #include <time.h> void spiral(int array[100][100], int m, int n, int s) { int size, b, x = 0, y = 1, num = 1; size = m*n; for (num=1;num<=size+1;num++) { for (b = x; b < n; b++) { if (num <=s) { array[x][b]

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 6 months ago . Improve this question I need to create a 2D Array with 10 columns and an unspecified row amount. My idea is to malloc the array but unfortunately I don't know how to do that with a 2D Array. Can someone provide me with a simple code? So far, I have this: int arr[][10]; int rows = malloc(sizeof(int

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 6 months ago . Improve this question I need to create a 2D Array with 10 columns and an unspecified row amount. My idea is to malloc the array but unfortunately I don't know how to do that with a 2D Array. Can someone provide me with a simple code? So far, I have this: int arr[][10]; int rows = malloc(sizeof(int

问题 I have an array like vendors = [{ Name: 'Magenic', ID: 'ABC' }, { Name: 'Microsoft', ID: 'DEF' } // and so on... ]; How do I check this array to see if "Magenic" exists? I don't want to loop, unless I have to. I'm working with potentially a couple thousand records. 回答1: 2018 edit : This answer is from 2011, before browsers had widely supported array filtering methods and arrow functions. Have a look at CAFxX's answer. There is no "magic" way to check for something in an array without a loop.

问题 I'm trying to read from a file and print out what's in the file. Data in file is something like the following and consist of 100 rows and 10 columns. -1,0.53,1,1,1,0,0.8,1,0.5,0 Here is what I have tried: #include <stdio.h> #include <stdlib.h> #define NUMBEROFINPUT 100 //100 inputs. #define NUMBEROFCOLUMN 10 //10 rows. int main(){ int *dataFileInput[NUMBEROFINPUT][NUMBEROFCOLUMN]; FILE *dataFileptr; dataFileptr = fopen("group5_8.txt", "r"); if (dataFileptr == NULL){ perror("Error"); return 1;

问题 I want to update an array that I have in a mongo doc. The structure of which looks something like: { _id: id, myArray: [ {key1: val, key2: val, key3: val}, {key1: val, key2: val, key3: val}, {key1: val, key2: val, key3: val} ] } I need to be able to do something like the SQL equivalent of update WHERE. Namely, get this particular document in the collection by searching with id (which you can do trivially with MyDoc.update({_id: id}...); ) and then locate the specific object in the array based

问题 I want to update an array that I have in a mongo doc. The structure of which looks something like: { _id: id, myArray: [ {key1: val, key2: val, key3: val}, {key1: val, key2: val, key3: val}, {key1: val, key2: val, key3: val} ] } I need to be able to do something like the SQL equivalent of update WHERE. Namely, get this particular document in the collection by searching with id (which you can do trivially with MyDoc.update({_id: id}...); ) and then locate the specific object in the array based

问题 I'm trying to assign array result of function to an array. It works fine, if i try to assign one element of result array to my array, but it returns error while trying to assign whole result array to my array ("Can't assign to array"). Sub test() Dim lol(6) as Double lol = Hehe2() End Sub Function Hehe2() As Double() Dim Zliczacz(1 To 6) As Double Zliczacz(1) = 1 / 2 Zliczacz(2) = 1 / 2 Zliczacz(3) = 1 / 2 Zliczacz(4) = 1 / 2 Zliczacz(5) = 1 / 2 Zliczacz(6) = 1 / 2 Hehe2 = Zliczacz() End

问题 I'm trying to assign array result of function to an array. It works fine, if i try to assign one element of result array to my array, but it returns error while trying to assign whole result array to my array ("Can't assign to array"). Sub test() Dim lol(6) as Double lol = Hehe2() End Sub Function Hehe2() As Double() Dim Zliczacz(1 To 6) As Double Zliczacz(1) = 1 / 2 Zliczacz(2) = 1 / 2 Zliczacz(3) = 1 / 2 Zliczacz(4) = 1 / 2 Zliczacz(5) = 1 / 2 Zliczacz(6) = 1 / 2 Hehe2 = Zliczacz() End

问题 I have this list of ingredients I am trying to make a regex to look for 1 cup , or 1 tsp or 1 tablespoon and so on..... I have made this regex but It doesn't work as well. I am trying separate ingredients from the measurements. So with this string 1 Chopped Tomato it should take out the 1 as amount and output this: const output = [ { val: "Chopped Tomato", amount: "1", }, And with this string below it should be able to take out ½ tsp from ½ tsp fine salt and output this: const output = [ {