- What is a hash map in programming and where can it be used
Hashmap is used for storing data in key value pairs We can use a hashmap for storing objects in a application and use it further in the same application for storing, updating, deleting values
- collections - What are the differences between a HashMap and a . . .
What are the differences between a HashMap and a Hashtable in Java? Which is more efficient for non-threaded applications?
- java - Iterate through a HashMap - Stack Overflow
Since all maps in Java implement the Map interface, the following techniques will work for any map implementation (HashMap, TreeMap, LinkedHashMap, Hashtable, etc ) Method #1: Iterating over entries using a For-Each loop This is the most common method and is preferable in most cases It should be used if you need both map keys and values in
- Difference between HashSet and HashMap? - Stack Overflow
Apart from the fact that HashSet does not allow duplicate values, what is the difference between HashMap and HashSet in their implementation? It's a little bit vague because both use hash tables to
- Java: how to convert HashMap lt;String, Object gt; to array
I need to convert a HashMap<String, Object> to an array; could anyone show me how it's done?
- What is the best way to use a HashMap in C++? [closed]
A hash_map is an older, unstandardized version of what for standardization purposes is called an unordered_map (originally in TR1, and included in the standard since C++11) As the name implies, it's different from std::map primarily in being unordered -- if, for example, you iterate through a map from begin() to end(), you get items in order by key 1, but if you iterate through an unordered
- How to preserve insertion order in HashMap? - Stack Overflow
I'm using a HashMap When I iterate over the map, the data is returned in (often the same) random order But the data was inserted in a specific order, and I need to preserve the insertion order H
|