From e8cf1e9a9cc078e1c56095b881f23ad0d7cf2e00 Mon Sep 17 00:00:00 2001
From: Wang Bin <wangbin.zibo@gmail.com>
Date: Sat, 4 Apr 2015 15:30:11 +0800
Subject: [PATCH] small refactor

---
 posseg/prob_trans.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/posseg/prob_trans.go b/posseg/prob_trans.go
index 370bba7..08fcf74 100644
--- a/posseg/prob_trans.go
+++ b/posseg/prob_trans.go
@@ -4,13 +4,15 @@ import (
 	"math"
 )
 
+var inf = math.Inf(-1)
+
 type probTransMap map[string]float64
 
 func (m probTransMap) Get(key string) float64 {
 	if value, ok := m[key]; ok {
 		return value
 	} else {
-		return math.Inf(-1)
+		return inf
 	}
 }