From 55a5055db3a0e3bb4468d05adcda450a375e1eb1 Mon Sep 17 00:00:00 2001
From: yigencong <yigencong@yahoo.com>
Date: Thu, 22 Feb 2024 23:05:56 +0800
Subject: [PATCH] =?UTF-8?q?feta:=20=E6=B7=BB=E5=8A=A0=E5=87=BD=E6=95=B0isS?=
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 =?UTF-8?q?=E6=9C=89=E5=BA=8F)?=
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---
 util/index.mjs | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/util/index.mjs b/util/index.mjs
index 861ae76..3868ef2 100644
--- a/util/index.mjs
+++ b/util/index.mjs
@@ -70,5 +70,28 @@ export function swap(array, a, b) {
   }
   
 
-
-
+  export function isSort(arr) {
+    const len = arr.length
+    let isInverted = false
+    if(len <2) {
+      return true
+    }
+    // 判断数组是否倒序
+    if(arr[0] > arr[1]) {
+      isInverted = true
+    }
+    if(isInverted) {
+      for(let i=0;i<len-1;i++){
+        if(arr[i]<arr[i+1]){
+          return false
+        }
+      }
+    }else{
+      for(let i=0;i<len-1;i++){
+        if(arr[i]>arr[i+1]){
+          return false
+        }
+      }
+    }
+    return true
+  }