Galaxy / Script / Language Overview / Arrays
Arrays are a way to store and use multiple values of the same type.
int[10] list; int i = 0; while (i < 10) { list[i] = i * i; i += 1; } print(list[5]); // 25 print(list[10]); // error, index overflow
The list then has 10 values in it, indexed from 0 to 9, filled with the values { 0, 1, 4, 9, 16, 25, 36, 49, 64, 81 }.
Arrays must have their length pre-declared. As far as Galaxy is concerned, int[10] is a completely different type from int[12].
Arrays can be of any type.
struct MyType { int alpha; fixed bravo; }; MyType[5] list;
Dynamic collections
There is no current way to make a dynamically-sized array or array-like structure, but you can simulate it by making a large array and keeping the current length around.
const int c_maxListLength = 100; struct List { fixed[c_maxListLength] data; int length; }; void List_Add(List* self, fixed value) { self.data[self.length] = value; self.length += 1; } fixed List_Pop(List* self) { self.length -= 1; } void List_Clear(List* self) { self.length = 0; } List list; List_Add(&list, 5.0); List_Add(&list, 10.0); print(list.length); // 2 print(list.data[0]); // 5.0 print(list.data[1]); // 10.0
Multidimensional Arrays
Multidimensional arrays are available in Galaxy.
int[4][2] matrix; int i = 0; int j; while (i < 4) { j = 0; while (j < 2) { matrix[i][j] = i * j; j += 1; } i += 1; } print(matrix[3][1]); // 3 print(matrix[2][0]); // 0
