🐛 fix: array unique(#7)

Author: ConardLi

JavaScript/数组去重、扁平、最值.md

@@ -41,7 +41,7 @@ const unique = arr => [...new Set(arr)];
         if (!i || array[i] != array[pre]) {
           result.push(array[i]);
         }
-        pre = array[i];
+        pre = i;
       }
       return result;
     }

docs/JavaScript/数组去重、扁平、最值.md

@@ -46,7 +46,7 @@ const unique = arr => [...new Set(arr)];
         if (!i || array[i] != array[pre]) {
           result.push(array[i]);
         }
-        pre = array[i];
+        pre = i;
       }
       return result;
     }