added u.shuffle

src/_exports.ts

@@ -37,6 +37,7 @@ export * from './resolveObjectProperty'
 export * from './rmfast'
 export * from './round'
 export * from './setmanip'
+export * from './shuffle'
 export * from './sleep'
 export * from './splice'
 export * from './split'

src/shuffle.ts

@@ -0,0 +1,14 @@
+import { randint } from './randint'
+import { randUniqueList } from './randUniqueList'
+
+/**
+ * Shuffle elements in an array
+ */
+export function shuffle <T> (arr: T[]): void {
+  const indices = randUniqueList(() => randint(arr.length), arr.length)
+  const values = indices.map(i => arr[i])
+
+  for (let i = 0; i < arr.length; i++) {
+    arr[i] = values[i]
+  }
+}