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Questions tagged
collections
313 questions · page 1 of 7
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91
votes
2
answers
In what situations is the CopyOnWriteArrayList suitable?
java
collections
asked 2013-07-25T08:42:55.667
20
votes
3
answers
Java: how to ensure serializable collections
java
serialization
collections
asked 2013-07-23T08:23:07.107
32
votes
6
answers
How to create ArrayList (ArrayList<Integer>) from array (int[]) in Java
java
arrays
generics
collections
asked 2013-07-08T07:15:52.927
14
votes
6
answers
Hashcode for NULL key in HashMap
java
collections
hashmap
asked 2013-06-24T04:49:59.860
37
votes
2
answers
Add one item multiple times to same List
c#
collections
asked 2013-06-18T12:40:25.343
18
votes
2
answers
HashMap.this.clear() what does this mean, how does this work
java
collections
asked 2013-06-08T12:38:01.667
14
votes
2
answers
Java TreeSet: remove and contains() not working
java
collections
set
asked 2013-06-06T19:07:19.417
8
votes
2
answers
Generics: Cannot convert from Collections.emptyList() to List<String>
java
generics
collections
empty-list
asked 2013-05-28T05:59:59.183
9
votes
1
answers
Order By vs Sort for creating ordered collection
c#
sorting
collections
asked 2013-05-16T08:37:15.190
28
votes
6
answers
Collection that will maintain insertion order and no duplicates
java
collections
asked 2013-05-10T10:44:14.407
9
votes
2
answers
Java Generics for Upper bound & lower bound wild cards
java
generics
collections
wildcard
asked 2013-04-24T10:09:28.710
22
votes
2
answers
120 mongodb collections vs single collection - which one is more efficient?
mongodb
collections
sharding
asked 2013-04-19T07:04:39.013
11
votes
1
answers
Concurrent collection for .NET with timeouts?
c#
.net
collections
concurrency
timeout
asked 2013-04-10T14:49:42.440
9
votes
2
answers
Difference between 2 collections? (elements in collection1, but not in collection2)
java
list
collections
set
guava
asked 2013-04-10T12:17:46.303
11
votes
2
answers
Unexpected Performance Penalty in Java
java
performance
collections
asked 2013-04-09T13:58:24.100
11
votes
1
answers
Why heap is better than binary tree to represent a priority queue?
data-structures
collections
implementation
priority-queue
binary-heap
asked 2013-03-26T12:47:18.293
12
votes
5
answers
Scala conditional list construction
scala
collections
asked 2013-03-22T10:58:34.570
94
votes
10
answers
why HashMap Values are not cast in List?
java
arraylist
collections
hashmap
asked 2013-03-20T11:41:51.060
10
votes
3
answers
What .NET 4.0 System.Collections.Concurrent collection added in functionality to .NET 3.0 SynchronizedCollection?
c#
multithreading
collections
concurrency
thread-safety
asked 2013-02-27T08:03:40.043
9
votes
5
answers
Is T[] not better than IEnumerable<T> as parameter type? (Considering threading challenges)
c#
multithreading
collections
thread-safety
ienumerable
asked 2013-02-20T12:10:18.477
123
votes
4
answers
What is the difference between Collections.emptyList() and Collections.EMPTY_LIST
java
list
collections
asked 2013-02-14T08:43:21.710
190
votes
15
answers
How to copy a java.util.List into another java.util.List
java
collections
copy
asked 2013-01-14T13:52:50.337
16
votes
2
answers
UnsupportedOperationException - the removeAll method is not supported by this collection (Java Collections)
java
collections
asked 2013-01-07T17:57:11.437
14
votes
6
answers
Collection - Iterator.remove() vs Collection.remove()
java
collections
iterator
concurrentmodification
asked 2013-01-07T16:58:02.370
20
votes
6
answers
Safe cast to hash map
java
collections
dictionary
hashmap
asked 2012-12-18T01:05:39.653
17
votes
5
answers
Java 7 API design best practice - return Array or return Collection
java
collections
asked 2012-11-29T10:47:02.540
19
votes
4
answers
C# listbox Collection syntax
c#
linq
collections
listbox
ienumerable
asked 2012-11-26T15:14:23.640
10
votes
6
answers
How do I shuffle two arrays in same order in java
java
arrays
list
collections
asked 2012-11-23T16:39:59.373
15
votes
4
answers
How can I do a conditional collectEntries in groovy
dictionary
collections
groovy
asked 2012-11-22T18:34:55.810
32
votes
2
answers
Is this a breaking change between AutoMapper 2.0.0 and 2.2.0?
c#
collections
ienumerable
automapper
automapper-2
asked 2012-11-21T20:36:55.503
8
votes
10
answers
How to sort a List<Enum, Collection> by order of an enum?
java
collections
enums
asked 2012-11-19T07:26:52.590
12
votes
5
answers
Counter in Collections module Python
collections
counter
python-import
importerror
python-2.6
asked 2012-11-09T15:38:21.753
49
votes
7
answers
How to search in a List of Java object
java
list
search
collections
asked 2012-10-30T12:28:07.753
12
votes
4
answers
The type T is not generic; it cannot be parameterized with arguments <?> error in a generic function
java
generics
collections
asked 2012-10-25T09:58:33.920
21
votes
2
answers
Is the defaultdict in Python's collections module really faster than using setdefault?
python
collections
defaultdict
setdefault
python-collections
asked 2012-09-23T20:25:48.297
17
votes
2
answers
Generic class compiles in Java 6, but not Java 7
java
generics
collections
java-7
java-6
asked 2012-08-30T22:00:19.357
84
votes
9
answers
Java: How to convert String[] to List or Set
java
arrays
collections
converters
asked 2012-08-16T11:58:31.857
43
votes
9
answers
Java: Composite key in hashmaps
java
collections
hash
hashmap
asked 2012-07-28T11:35:11.347
9
votes
4
answers
What does a hashset do with memory when initializing a collection?
c#
performance
memory
collections
hashset
asked 2012-07-19T08:43:39.977
36
votes
3
answers
Is there any reason EnumMap and EnumSet are not Navigable
java
collections
enums
asked 2012-07-17T11:18:08.163
13
votes
4
answers
Do .NET design guidelines suggest returning List<T> over IEnumerable<T>?
.net
collections
asked 2012-06-26T17:04:29.237
23
votes
7
answers
why there is no add method in Iterator interface
java
collections
iterator
asked 2012-06-25T20:07:32.150
12
votes
5
answers
How to find elements in a collection by property?
java
collections
apache-commons
asked 2012-06-11T12:54:49.190
8
votes
6
answers
Guava way of sorting List according to another list?
java
collections
guava
asked 2012-06-07T10:58:35.480
8
votes
2
answers
How does LinkedHashMap work under the hood?
java
oop
dictionary
collections
hashmap
asked 2012-06-03T12:29:01.313
25
votes
5
answers
What is the difference between Collection<?> and Collection<T>
java
generics
collections
types
unbounded-wildcard
asked 2012-05-27T22:22:54.217
12
votes
7
answers
Finding duplicate entries in Collection
java
collections
duplicates
equality
asked 2012-05-25T13:53:05.903
45
votes
3
answers
Initialize List<> with Arrays.asList
java
arrays
list
collections
array-initialization
asked 2012-05-23T20:24:10.393
13
votes
1
answers
ArgMin for vector<double> in C++?
c++
collections
stl
vector
asked 2012-05-19T18:32:49.577
8
votes
6
answers
Copying List of objects by value in Java
java
collections
asked 2012-05-08T09:16:19.230
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