Start implementation

src/misc.ts

@@ -0,0 +1,15 @@
+export function assert(x: unknown): asserts x {
+	if (!x) {
+		throw new Error('Assertion failed.');
+	}
+}
+
+export type TransformationMatrix = [number, number, number, number, number, number, number, number, number];
+
+export const last = <T>(arr: T[]) => {
+	return arr && arr[arr.length - 1];
+};
+
+export const isU32 = (value: number) => {
+	return value >= 0 && value < 2**32;
+};