remove util.js, common/Util.js

common/Util.js

@@ -0,0 +1,28 @@
+// get a unique id
+export const uniqId = () => Date.now().toString(36) + Math.random().toString(36).substring(2)
+
+// get a random int between min and max (inclusive)
+export const randomInt = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min
+
+// get one random item from the given array
+export const choice = (array) => array[randomInt(0, array.length - 1)]
+
+// return a shuffled (shallow) copy of the given array
+export const shuffle = (array) => {
+  let arr = array.slice()
+  for (let i = 0; i <= arr.length - 2; i++)
+  {
+    const j = randomInt(i, arr.length -1);
+    const tmp = arr[i];
+    arr[i] = arr[j];
+    arr[j] = tmp;
+  }
+  return arr
+}
+
+export default {
+  uniqId,
+  randomInt,
+  choice,
+  shuffle,
+}