bitview: reorg part 2

websites/bitview/scripts/core/array.js

@@ -0,0 +1,20 @@
+/**
+ * @param {number} start
+ * @param {number} end
+ */
+export function range(start, end) {
+  const range = [];
+  while (start <= end) {
+    range.push(start);
+    start += 1;
+  }
+  return range;
+}
+
+/**
+ * @template T
+ * @param {T[]} array
+ */
+export function random(array) {
+  return array[Math.floor(Math.random() * array.length)];
+}