Questions tagged [map]
The map tag has no summary.
65 questions
5
votes
3
answers
657
views
How to get rid of Mappers and make objects build themselves?
I am having a really hard time deciding where to instantiate my entities in the refactoring I am making. The project was built with DDD and it's layered: it has the infra, domain and app layers. In ...
1
vote
1
answer
190
views
How to map same name entities between domains in DDD?
I am working on the migration of a project from desktop to web. I am using VueJS 3 (composition API). Since this project has lots of modules, I thought about using DDD on the frontend for organization ...
1
vote
1
answer
139
views
Long dictionary/map key vs shorter key + equality check for an auth cache
I'm implementing an API key based authentication scheme and I'm caching valid API key entries (hash, scope etc.) in a memory cache. For the cache key, I had been using the first 8 characters of the ...
- 379
0
votes
1
answer
2k
views
Why is there no Hashmap in C++ like Java? [closed]
I know that the C++ standard library includes the ordered and the unordered map (std::map and std::unordered_map) containers, but why is there no hashmap available on C++? I was asked this questions ...
- 31
0
votes
1
answer
1k
views
Why shouldn't I be using SQLITE instead of the INI format in all cases?
Backstory
In an effort to store partial and full downloads to file in a clean manner, I had utilized QSettings which stores its key value pairs in the INI format in a single file.
https://doc.qt.io/qt-...
- 3,649
4
votes
2
answers
1k
views
Arrays vs Maps for listing items that have a unique id
I've been finding that for a lot of code I've been writing recently, it naively might look like this:
Array approach:
const options = [
{
id: 'red',
label: 'Red',
data: '#f00'
...
- 2,769
3
votes
3
answers
828
views
Read large JSON file and return a subset for map
To some extent, this is a wide question, because I do not know in which direction I should move.
I am using Polymaps to show markers on a map. The markers are static but the visualization depends on ...
- 141
2
votes
2
answers
298
views
Is registry pattern a valid use of global state?
For example, I want to convert json from server to generic object: Shape, as follow:
{
"type":"Circle",
"radius":"3",
},
{
"type":"Rectangle",
"width":"5",
"height":"6",
},
using ...
- 717
-2
votes
1
answer
196
views
Map synchronization algorithm
Say I have two Map instances in JavaScript (or HashMap in Java, or Dictionary in C#), A and B. I want to synchronize B to A, so that B is a copy of A. I can't copy the reference and I don't want to ...
- 432
1
vote
4
answers
164
views
filter + map api design
I am writing a library call that will allow you to filter and map in the same iteration of the loop, this is async/callback style in Java. The problem of course is that for filtering we usually return ...
user290257
3
votes
1
answer
110
views
java hashtable extending to support duplicates
I have to maintain an old application and have to extend some modules.
There is an hashtable that is used for maintaining/holding some objects as representation of running (real) processes (don't see ...
- 149
1
vote
2
answers
130
views
When define locale text file, language key (eg:'en') or text key (eg:'WELCOME_MESSAGE'), which one should be the outermost key?
When define a locale text map, I can use:
1.locale key first
{
"en":{
"WELCOME_TO_USE_THIS_APP":"Welcome to use this app,...",
"SOME_OTHER_TEXT":"fsdfsf..."
},
"es":{
"...
- 5,760
4
votes
5
answers
9k
views
Use POJO or Map when there is a finite number of known keys?
I have some set of data with key-value pairs, but there is only a finite and known set of keys, all of the key should always be present on that data, and they all have the same type for the value. ...
- 607
53
votes
1
answer
71k
views
What is the use of DTO instead of Entity?
I am working on RCP application, I'm new to this application.
Spring beans are used to write business logic to save/fetch entities.
But, instead of sending entities directly to client we are ...
- 653
0
votes
1
answer
382
views
How to avoid Global State with a world map?
This is a conceptual problem I'm having general difficulty with, and I'd like to look at an example that can hopefully help clarify this: using a map to represent an alterable game world. For ...
- 101