--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/eview.go	Sun Sep 17 14:33:27 2017 +0900
@@ -0,0 +1,54 @@
+package main
+
+import (
+    "bufio"
+    "flag"
+    "fmt"
+    "io/ioutil"
+    "log"
+    "os"
+    "sort"
+    "strings"
+)
+
+var n int
+var dir string
+func init() {
+	flag.IntVar( &n,   "n", 20, "print top N" )
+	flag.StringVar( &dir, "d", "data", "directory" )
+}
+
+func main() {
+    flag.Parse()
+
+	files, err := ioutil.ReadDir( dir )
+	if err != nil {
+		log.Fatal( err )
+	}
+
+    var ea []string
+	for _, file := range files {
+        if strings.HasPrefix( file.Name(), "m" ) {
+            f, err := os.Open( dir + "/" + file.Name() )
+            if err != nil {
+                log.Fatal( err )
+            }
+
+            scanner := bufio.NewScanner( f )
+            for scanner.Scan() {
+                if ! strings.HasPrefix( scanner.Text(), "ea = 9999.99" ) {
+                    ea = append( ea, scanner.Text() )
+                }
+            }
+            f.Close()
+        }
+	}
+
+    sort.Strings( ea )
+    for i, e := range ea {
+        if i > n - 1 {
+            break
+        }
+        fmt.Println( e )
+    }
+}