Add set function for dyn arr

include/htd/data_structure/dynamic_array.h

@@ -15,6 +15,8 @@ void dynarr_init(DynamicArray* arr, usize size);
 
 void* dynarr_at(DynamicArray* arr, usize idx);
 
+void dynarr_set(DynamicArray* arr, usize idx, void* data);
+
 void dynarr_push(DynamicArray* arr, void* data);
 
 void dynarr_free(DynamicArray* arr);

src/data_structure/dynamic_array.c

@@ -18,6 +18,10 @@ void* dynarr_at(DynamicArray* arr, usize idx) {
     return &((u8*)arr->data)[arr->data_size * idx];
 }
 
+void dynarr_set(DynamicArray* arr, usize idx, void* data) {
+    memcpy(&((u8*)arr->data)[arr->data_size * idx], data, arr->data_size);
+}
+
 void* dynarr_last(DynamicArray* arr) {
     return &((u8*)arr->data)[arr->data_size * (arr->len - 1)];
 }