feat(Go-Tool)：2020/11/23：修改项目案例(按照一定规则对一组数据进行排序分组)

vendor/github.com/ahmetb/go-linq/reverse.go

@@ -0,0 +1,30 @@
+package linq
+
+// Reverse inverts the order of the elements in a collection.
+//
+// Unlike OrderBy, this sorting method does not consider the actual values
+// themselves in determining the order. Rather, it just returns the elements in
+// the reverse order from which they are produced by the underlying source.
+func (q Query) Reverse() Query {
+	return Query{
+		Iterate: func() Iterator {
+			next := q.Iterate()
+
+			items := []interface{}{}
+			for item, ok := next(); ok; item, ok = next() {
+				items = append(items, item)
+			}
+
+			index := len(items) - 1
+			return func() (item interface{}, ok bool) {
+				if index < 0 {
+					return
+				}
+
+				item, ok = items[index], true
+				index--
+				return
+			}
+		},
+	}
+}