This can be accomplished by Unmarshaling into a map[string]json.RawMessage. var objmap map[string]json.RawMessage err := json.Unmarshal(data, &objmap) To further parse sendMsg, you could then do something like: var s sendMsg err = json.Unmarshal(objmap[“sendMsg”], &s) For say, you can do the same thing and unmarshal into a string: var str string err = json.Unmarshal(objmap[“say”], &str) EDIT: Keep … Read more
Now that you’ve edited to ask an almost completely different question, I’ll give a different answer. Rather than point to a tutorial on maps and folds, I’ll just give one. In Scala, you first need to know how to create an anonymous function. It goes like so, from most general to more specific: (var1: Type1, … Read more
What about entrySet() HashMap<String, Person> hm = new HashMap<String, Person>(); hm.put(“A”, new Person(“p1”)); hm.put(“B”, new Person(“p2”)); hm.put(“C”, new Person(“p3”)); hm.put(“D”, new Person(“p4”)); hm.put(“E”, new Person(“p5”)); Set<Map.Entry<String, Person>> set = hm.entrySet(); for (Map.Entry<String, Person> me : set) { System.out.println(“Key :”+me.getKey() +” Name : “+ me.getValue().getName()+”Age :”+me.getValue().getAge()); }
TreeMap extends Map and supports custom comparators. String provides a default case insensitive comparator. So: final Map<String, …> map = new TreeMap<>(String.CASE_INSENSITIVE_ORDER); The comparator does not take locale into account. Read more about it in its JavaDoc.
A secure way to process unknown interfaces, just use fmt.Sprintf() https://play.golang.org/p/gOiyD4KpQGz package main import ( “fmt” ) func main() { mapInterface := make(map[interface{}]interface{}) mapString := make(map[string]string) mapInterface[“k1”] = 1 mapInterface[3] = “hello” mapInterface[“world”] = 1.05 for key, value := range mapInterface { strKey := fmt.Sprintf(“%v”, key) strValue := fmt.Sprintf(“%v”, value) mapString[strKey] = strValue } fmt.Printf(“%#v”, … Read more
There isn’t much you can do about it. Your have options to work with two maps, use multi-key map like one from Boost Multi-Index library, or do linear search. UPDATE: The most lightweight out of the box solution seems to be Boost.Bimap, which stands for bi-directional map.
Like this: <c:forEach var=”entry” items=”${myMap}”> Key: <c:out value=”${entry.key}”/> Value: <c:out value=”${entry.value}”/> </c:forEach>
If you just want to freeze the map view at the overlay, you could set the map view’s region to the overlay’s bounds and set scrollEnabled and zoomEnabled to NO. But that won’t let the user scroll or zoom inside the overlay’s bounds. There aren’t built-in ways to restrict the map view to the overlay’s … Read more
Thanks to pheelicks and Nikita Koksharov answers, I manage to turn on/off the rotation of a mapview according to the compass. First you will need the two inner class of MapViewCompassDemo.java found at: Android_SDK_ Tools\add-ons\addon-google_apis-google-#\samples\MapsDemo\src\com\example\android\apis\view\ RotateView SmoothCanvas Extract the inner class RotateView to RotateView.java and add SmoothCanvas as a inner class of RotateView.java instead of … Read more
The map::operator[] searches the data structure for a value corresponding to the given key, and returns a reference to it. If it can’t find one it transparently creates a default constructed element for it. (If you do not want this behaviour you can use the map::at function instead.) You can get a full list of … Read more