Bidirectional map is associative data structure where keys and values can switch their roles.
Questions tagged [bimap]
85 questions
0
votes
1 answer
Expose public view of privately scoped Boost.BiMap iterator
I have a privately scoped Boost.BiMap in a class, and I would like to export a public view of part of this map. I have two questions about the following code:
class Object {
typedef bimap<
unordered_set_of,
…
Noah Watkins
- 5,446
- 3
- 34
- 47
0
votes
0 answers
Android Studio ImageView and Bitmap
An activity has an icon to choose Image from Files. After choosing the Image, The next activity page opens which has A button and an ImageView where the selected iimage should be displayed.
I can choose the Image but it does not show on…
Malik Zohaib Mustafa
- 45
- 4
0
votes
1 answer
How extend a BiMap with a Vec in Rust?
How can i push this
["a", "bb", "c", "dd", "e", "ff", "g", "hh"] //type is Vec
to this
fn list_codes() -> BiMap
{
let letters = BiMap::::new();
[('a',"cl01"),
('b',"cl02"),
('c',"cl03"),
…
ChemistryIsTheBest
- 41
- 5
0
votes
2 answers
Java Initialize EnumBiMap From Two Enum Types
What's the most convenient way to initialize an EnumBiMap from two different enum types? I have the following scenario:
public enum First {
A,
B,
C
}
and
public enum Second {
ALPHA,
BETA,
GAMMA
}
I have tried something like
…
Nizbel99
- 123
- 6
0
votes
1 answer
override getOrDefault of HashBiMap implementation
Working with Guava library.
I want to override(to add some validation) the getOrDefault method of HashBiMap implementation.
Looking into it, HashBiMap class is declared as final, I can't extend it.
Any idea?
@GwtCompatible(emulated = true)
public…
Dc0
- 11
- 1
0
votes
1 answer
boost::bimap finds wrong entry when using a custom struct as the key, why?
i have a custom struct i am mapping to some data using a boost::bimap.
Unfortunately, the bimap find() does not work as expected.
Below is a minimal example to demonstrate:
#include
#include
struct S{
int a;
int…
kaneco
- 3
- 1
0
votes
1 answer
Is there a way to force every element of a (multiset_of,multiset_of) boost::bimap to be unique?
I have a multi set Bimap that looks like:
6 <--> 71
6 <--> 71
6 <--> 71
8 <--> 71
8 <--> 71
10 <--> 71
10 <--> 74
element = left key + right key, or a row in the above block
I would like to remove the elements where the lines are equivalent to…
Jordan Palmer
- 1
- 1
0
votes
2 answers
How can I compare a String with an Array of Strings to get the Value from a Map?
I'm having a BiMap with a String as key and an array of Strings as value.
Now i'm trying to get with a single String (which is part of the value array) the key.
private static BiMap map = ImmutableBiMap.
LucBBC
- 29
- 3
0
votes
1 answer
C++ boost::bimap insert() method not working
I am trying to insert data in boost::bimap but gives an error.
typedef boost::bimap bimap_type;
bimap_type _obs_ids;
void store_domains_obs_ids(const std::string & name, const std::string & obs_id) const
{
…
Ayan Bhuin
- 5
- 2
0
votes
1 answer
Google Guava BiMap - inversed get-Method doesn't work
I really don't like asking here, but this time I've searched, I've read the docs, I've asked for help in other places and apparently nobody knows how to fix my problem.
I use the BiMap from google Guava for my java application, because I have a…
Johnny
- 67
- 5
0
votes
1 answer
Is C++ bimap possible with one side of view having different key than other side of the view value? How to do that?
At the beginning I needed a map, so I used std::map.
Then, some requirements were added and I needed to also get "keys" for "value" (foos for bar), so I used
boost::bimaps::bimap<
…
Lukas Salich
- 959
- 2
- 12
- 30
0
votes
1 answer
Boost BiMap Parse Template Error
I am getting parse template error when I add #include
I want to find the key of a map from its value and hence thought of using Boost's Bimap but getting below error.
/usr/include/boost/bimap/relation/structured_pair.hpp: In…
spnsp
- 163
- 1
- 8
0
votes
0 answers
How to add values in BiMap JAVA 8?
I am trying to create a BiMap.
BiMap> rankedItem = HashBiMap.create();
for (Catalogue catlogue : latestItemCataloug) {
String name = catlogue.getName();
List- itemList…
user3407267
- 1,524
- 9
- 30
- 57
0
votes
0 answers
Is there a functional n:1 bimap?
I have a map where multiple keys can map to the same value. I'd like to do reverse lookups, such that given a value, I get a list of all keys that map to this value.
Note that unlike
Data.Bimap my map is not 1:1 but n :1.
Also, the reverse lookup…
Dierk
- 1,308
- 7
- 13
0
votes
1 answer
Masked bitmap on canvas with transparent activity
I implemented custom ShowCase for activity
I am trying to draw on canvas mask:
https://i.stack.imgur.com/u23kQ.png
Following this code:
mCanvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);
// draw solid background
…
SSHEX
- 27
- 1
- 9