refactor: start files migration nightmare

src/utils/arrayUtils.ts

@@ -0,0 +1,33 @@
+import {UINT16_MAX, UINT32_MAX, UINT8_MAX} from "../constants";
+
+export function last<T>(array: T[]) {
+  return array[array.length - 1];
+}
+
+export function unique<T>(array: T[]) {
+  return [...new Set(array)];
+}
+
+function getTypedArray(maxValue: number) {
+  console.assert(
+    Number.isInteger(maxValue) && maxValue >= 0 && maxValue <= UINT32_MAX,
+    `Array maxValue must be an integer between 0 and ${UINT32_MAX}, got ${maxValue}`
+  );
+
+  if (maxValue <= UINT8_MAX) return Uint8Array;
+  if (maxValue <= UINT16_MAX) return Uint16Array;
+  if (maxValue <= UINT32_MAX) return Uint32Array;
+  return Uint32Array;
+}
+
+interface ICreateTypedArray {
+  maxValue: number;
+  length: number;
+  from: ArrayLike<number>;
+}
+
+export function createTypedArray({maxValue, length, from}: ICreateTypedArray) {
+  const typedArray = getTypedArray(maxValue);
+  if (!from) return new typedArray(length);
+  return typedArray.from(from);
+}