MongoDB  2.7.0
map_util.h
1 // "mongo/util/map_util.h"
2 
3 /* Copyright 2012 10gen Inc.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #pragma once
19 
20 namespace mongo {
21 
22 /*
23  * If "myMap" contains "key", returns "myMap[key]". Otherwise, returns "defaultValue."
24  */
25 template <typename M, typename K, typename V>
26 V mapFindWithDefault(const M& myMap, const K& key, const V& defaultValue) {
27  typename M::const_iterator it = myMap.find(key);
28  if(it == myMap.end())
29  return defaultValue;
30  return it->second;
31 }
32 
33 } // end namespace