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Questions tagged hashmap

82 questions · page 1 of 2

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14
votes
6
answers

Hashcode for NULL key in HashMap

java collections hashmap
asked 2013-06-24T04:49:59.860
77
votes
11
answers

How to get values and keys from HashMap?

java hashmap
asked 2013-04-26T23:53:44.533
42
votes
2
answers

Guava ImmutableMap has noticeably slower access than HashMap

java performance hashmap benchmarking guava
asked 2013-04-02T05:40:48.650
17
votes
1
answers

Hash-consing in F# and weak hash tables in .net

.net f# hashmap hashset
asked 2013-03-25T14:11:14.560
94
votes
10
answers

why HashMap Values are not cast in List?

java arraylist collections hashmap
asked 2013-03-20T11:41:51.060
33
votes
5
answers

How to get a HashMap value with three values

java hashmap
asked 2013-01-03T22:32:47.163
20
votes
6
answers

Safe cast to hash map

java collections dictionary hashmap
asked 2012-12-18T01:05:39.653
31
votes
9
answers

Java HashMap get method null pointer exception

java nullpointerexception hashmap
asked 2012-12-03T16:17:17.627
161
votes
6
answers

How to understand Locality Sensitive Hashing?

c machine-learning hashmap nearest-neighbor locality-sensitive-hash
asked 2012-10-18T10:37:48.480
165
votes
9
answers

Does adding a duplicate value to a HashSet/HashMap replace the previous value

java hashmap duplicates hashset
asked 2012-10-17T18:14:14.990
8
votes
3
answers

Multiple Column Structure Java

java data-structures hashmap
asked 2012-10-03T20:56:44.203
94
votes
2
answers

ConcurrentHashMap and Hashtable in Java

java hashmap hashtable
asked 2012-09-28T19:45:54.200
43
votes
9
answers

Java: Composite key in hashmaps

java collections hash hashmap
asked 2012-07-28T11:35:11.347
26
votes
2
answers

java.lang.NullPointerException: println needs a message

android nullpointerexception hashmap println
asked 2012-07-12T10:09:42.683
19
votes
4
answers

How HashTable and HashMap key-value are stored in the memory?

java hashmap hashtable
asked 2012-06-05T09:12:14.930
8
votes
2
answers

How does LinkedHashMap work under the hood?

java oop dictionary collections hashmap
asked 2012-06-03T12:29:01.313
21
votes
3
answers

ConcurrentHashMap put vs putIfAbsent

java caching concurrency hashmap
asked 2012-05-07T17:31:05.643
8
votes
1
answers

Struts 2 - s:select using Map

jakarta-ee select struts2 hashmap
asked 2012-05-03T10:46:28.257
10
votes
3
answers

Infinite loop in java.util.HashMap

java hashmap vaadin infinite-loop
asked 2012-04-18T23:45:53.727
50
votes
5
answers

JQuery $.ajax() post - data in a java servlet

javascript jquery ajax hashmap
asked 2012-04-18T17:30:51.207
10
votes
4
answers

Multimap Space Issue: Guava

java database hashmap guava
asked 2012-03-29T17:26:12.613
25
votes
3
answers

Common Lisp: getting all keys of a given hash table as a list

lisp hashmap hashtable common-lisp key
asked 2012-03-15T12:37:41.237
28
votes
5
answers

When should I use a Hashtable versus a HashMap

java collections hashmap hashtable
asked 2012-03-02T15:40:12.350
26
votes
2
answers

how to remove entry from hashmap by Value?

java hashmap
asked 2012-03-02T03:26:46.167
33
votes
4
answers

Why is the initialCapacity of Hashtable 11 while the DEFAULT_INITIAL_CAPACITY in HashMap is 16 and requires a power of 2?

java hashmap hashtable
asked 2012-02-23T13:25:58.920
15
votes
2
answers

Drools Rule depending on Knowledge from JDK Map (not within non-JDK Class)

java hashmap drools
asked 2012-02-01T10:02:28.643
9
votes
5
answers

How to get a immutable collection from java HashMap?

java collections hashmap
asked 2012-01-28T05:46:15.353
68
votes
1
answers

What hash algorithm does Python's dictionary mapping use?

python hashmap
asked 2012-01-25T04:40:47.823
54
votes
6
answers

Difference between Hashtable and Collections.synchronizedMap(HashMap)

java collections synchronization hashmap hashtable
asked 2012-01-16T04:10:25.270
19
votes
1
answers

What happens when HashMap or HashSet maximum capacity is reached?

java collections size hashmap overflow
asked 2011-12-20T18:56:17.080
8
votes
2
answers

How to sort HashMap based on Date?

java sorting hashmap date-sorting
asked 2011-11-28T15:39:51.417
171
votes
12
answers

Sorting HashMap by values

java sorting hashmap
asked 2011-11-14T09:14:39.157
65
votes
3
answers

Performant Haskell hashed structure.

haskell hashmap hashtable
asked 2011-10-25T19:40:17.853
92
votes
10
answers

Sorting hashmap based on keys

java hashmap
asked 2011-10-22T16:14:09.210
195
votes
16
answers

HashMap to return default value for non-found keys?

java dictionary hashmap
asked 2011-09-22T18:02:50.670
9
votes
1
answers

TBB Concurrent Hash map

c++ hashmap tbb concurrenthashmap
asked 2011-09-16T19:20:04.287
11
votes
7
answers

Java - Can a hashmap have 4 generic parameters instead of 2?

java hash hashmap
asked 2011-08-30T13:40:07.343
45
votes
7
answers

Iterating through a LinkedHashMap in reverse order

java hashmap linkedhashmap
asked 2011-08-24T05:33:19.233
105
votes
5
answers

What is the optimal capacity and load factor for a fixed-size HashMap?

java hashmap
asked 2011-08-18T23:40:47.487
41
votes
2
answers

clojure convert lazy-seq to hash map

clojure hashmap
asked 2011-08-12T01:15:10.883
14
votes
2
answers

why i can't create a Map of String and generic object

java generics dictionary hashmap
asked 2011-08-05T09:54:28.077
267
votes
15
answers

How does a Java HashMap handle different objects with the same hash code?

java hashmap hashcode hash-function
asked 2011-06-27T13:31:40.790
17
votes
2
answers

Display key and value of HashMap entries in JSF page

jsf hashmap
asked 2011-06-03T10:06:47.377
9
votes
2
answers

How to show hashmap values in jsf?

java jsf hashmap uirepeat
asked 2011-05-14T12:13:07.097
192
votes
20
answers

Finding Key associated with max Value in a Java Map

java hashmap
asked 2011-05-06T12:07:30.563
68
votes
7
answers

Java : Iteration through a HashMap, which is more efficient?

java dictionary performance hashmap iteration
asked 2011-04-28T23:52:04.563
9
votes
4
answers

Java Weak Hash Map - Need to remove entry based on weakness of value, not key

java hashmap weakhashmap
asked 2011-04-14T16:30:39.877
25
votes
1
answers

Get value of HashMap by specific key in EL without iterating over it

jsp hashmap el
asked 2011-03-22T17:23:56.530
16
votes
1
answers

VB.NET HashMap equivalent

vb.net hashmap
asked 2011-03-09T11:16:13.073
18
votes
7
answers

Why ArrayList grows at a rate of 1.5, but for Hashmap it's 2?

java arraylist hashmap
asked 2011-02-18T11:31:05.560
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