装备：洗练

shared/pubUtils/util.ts

@@ -180,7 +180,7 @@ export function shouldRefreshWeek(preTime: Date, now: Date, day: number = 1, hou
  */
 export function getRandEelm<T>(source: Array<T> = [], cnt = 1): Array<T> {
     if (cnt == 0) return [];
-    if (cnt >= source.length) return source;
+    if (cnt >= source.length) return sortArrRandom(source);
     let idxs = new Set();
 
     while (1) {
@@ -337,6 +337,11 @@ export const cal = {
     }
 };
 
+export function getDecimalCnt(num: number) {
+    let str = num.toString();
+    return str.split('.')[1]? str.split('.')[1].length: 0;
+}
+
 //计算公式
 // export function calculateNum(ratio: { A: number, B: number }, params: { num: number }, defaultVal = 0) {
 //     // result = a * num + b