[Solved] How to shrink at runtime a struct matrix (using realloc() for example)

You should reduce the number of columsn, not rows. Not mat1 but mat1->array should be reallocated. Not nrow and ncol (not updated) but mat1->nrows and mat1->ncols (updated) should be used for the new size. The elements are size_t, so allocating for int mayn’t be enough. Using the variable for calculating size is safe. In the … Read more

[Solved] Dynamically allocated C array suddenly getting modified [closed]

At least this statement array->values = realloc(array->values, array->capacity); shall be rewritten like array->values = realloc(array->values, array->capacity * sizeof( Value ) ); Though it would be more safer to use an intermediate pointer like for example Value *tmp = realloc(array->values, array->capacity * sizeof( Value ) ); if ( tmp != NULL ) { array->values = tmp; … Read more

[Solved] malloc: *** error for object 0x147606ac0: pointer being realloc’d was not allocated

The function is not updating the caller’s value of client_details, you need one more level of pointer: void func(struct client_detail **client_details,int *size){ *client_details = realloc(*client_details, (*size + 1) * sizeof(**client_details)); *size = *size + 1; } int main() { struct group_detail *group_details = malloc(0 * sizeof(*group_details)); struct client_detail *client_details = malloc(1 * sizeof(*client_details)); int size … Read more

[Solved] How can I get the values of data attributes in JavaScript code?

You need to access the dataset property: document.getElementById(“the-span”).addEventListener(“click”, function() { var json = JSON.stringify({ id: parseInt(this.dataset.typeid), subject: this.dataset.type, points: parseInt(this.dataset.points), user: “Luïs” }); }); Result: // json would equal: { “id”: 123, “subject”: “topic”, “points”: -1, “user”: “Luïs” } 2 solved How can I get the values of data attributes in JavaScript code?

[Solved] how can i change String array to String [closed]

You can try the below code to convert string array to string public class JavaApplication20 { public static void main(String[] args) { // TODO code application logic here String test1 = “”; String[] test = {“this”,”this2″}; int length = test.length; //System.out.println(“Length :”+length); for(int i=0; i<length; i++){ //System.out.println(test[i]); test1 += test[i]+”,”; } int len = test1.length(); … Read more