update readme.md

wbpmrck · Jun 5, 2017 · 55eb9cb · 55eb9cb
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diff --git a/README.md b/README.md
@@ -57,7 +57,7 @@ study cases of Rxjs library
         - concatMapTo
         - exhaustMap
         - expand
-        - groupBy
+        - [groupBy](./study/operators/groupBy.html)
         - [map](./study/operators/map.html)
         - [mapTo](./study/operators/mapTo.html)
         - [mergeMap](./study/operators/mergeMap.html)
@@ -162,7 +162,7 @@ study cases of Rxjs library
         - count
         - max
         - min
-        - reduce
+        - [reduce](./study/demos/reduce.html)
 - 综合练习
     - [Drag DOM](./study/demos/dragDOM.html)
     - [DragDOM_extend](./study/demos/dragDOM_extend.html)

diff --git a/study/operators/scan.html b/study/operators/scan.html
@@ -43,6 +43,7 @@ <h1>功能说明:</h1>
 <h1>备注事项:</h1>
 <ul class="notice">
     <li>scan类似数组里的reduce,适合对序列做一些累加减等递归操作</li>
+    <li>和reduce只返回一个value不同,scan每一次执行完accumulator都会把中间结果返回</li>
 </ul>
 
 <div class="demo">