init

Tool/number.js

@@ -0,0 +1,22 @@
+//生成从minNum到maxNum的随机数
+export function randomNum (minNum, maxNum) {
+    switch (arguments.length) {
+        case 1:
+            return parseInt(Math.random() * minNum + 1, 10);
+        case 2:
+            return parseInt(Math.random() * (maxNum - minNum + 1) + minNum, 10);
+        default:
+            return 0;
+    }
+}
+
+
+/*
+ * 数组循环函数
+ * @param {Array} arr 
+ * @param {number} index 
+ */
+export function nextArray(arr, index) {
+    index--;
+    return arr.slice(index + 1, arr.length).concat(arr.slice(0, index + 1));
+}