I am new to using the MultiMap interface, any help would be great.
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Java's priority queue is a data structure with O(log n) complexity for put (insertion) and O(log n) for poll (retrieval and removal of the min element).
C++ STL's |
is it possible to have multiple values for a single key in the java dictionary class??
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I want to have Map with duplicate keys, I know there are many Map implementations(eclipse shows me about 50), so I bet there must be one that allows this. I know ... |
I'm doing some heavy processing (building inverse indices) using ints/ longs in Java.
I've determined that (un)boxing of standard java.collections maps takes a big portion of the total processing time. (as ... |
I'm having a bit of a hard time. Essentially I need a data structure that would work a bit like a database. I need to be able to have multiple bits ... |
I'm trying to have a (hash-based) Multimap with a (hash-based) Multiset of values for each key. See the example:
Multimap<Object, Object> mmap = Multimaps.newMultimap(
Maps.<Object, Collection<Object>>newHashMap(),
...
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I need a collection that behaves something like C++ multimap, but I also need to be able to get elements by a range of keys.
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I didn't find such a multimap construction... When i want to do this, I iterate over the map, and populate the multimap. Is there an other way ??
final Map<String, Collection<String>> map ...
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In my code I have a map that is used heavily, several thousand times in a few seconds. Originally I had a TreeMap, but when testing with 9,000 entries I watched ... |
I have to implement Priority Queue using MultiMap. I use MultiMap from Google Collections.
The following code creates a MultiMap and adds few elements into it.
Multimap<Integer, ...
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I would like to have a c.g.c.c.Multimap that is sorted based on keys only. The values shouldn't be sorted. I've tried to build something with guava's TreeMultimap, but I can't use ... |
We can use Maps.uniqueIndex() to create a Map out of any Iterable which is very handy. But I need to create a Multimap and I'm having Iterable, is there any nice ... |
At one place i have to use a map with many values mapped to a single key, so i was wondering whether there is any significant performance distinction between using HashMap ... |
I'm still seeking an ideal solution to this question. To summarize, I am modeling a power subsystem in Java and I need a Directed-Acyclic-Graph (DAG)-type container for my data.
I ... |
I have a MultiMap and need the best possible way to get an EntrySet of a MultiMap using one of the values in the list. Right now, I'm iterating through ... |
If I have a Guava Multimap, how would I sort the entries based on the number of values for the given key?
For instance:
Multimap<String, String> multiMap = ArrayListMultimap.create();
multiMap.put("foo", "1");
multiMap.put("bar", "2");
multiMap.put("bar", "3");
multiMap.put("bar", "99");
Given ... |
I'm trying to use a com.google.common.collect.Multimap<String, Foo> from Freemarker.
In a Multimap, for each key in the map, you get back Collection.
I tried the following but it didn't work:
Java:
context.put("itemsByCategory", itemsByCategory);
FreeMarker:
<#list exclusiveItems?keys as ...
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I am looking for a way to store key-value pairs. I need the lookup to be bidirectional, but at the same time I need to store multiple values for the same ... |
why does Guava doesn't have the following factory call to create a MultiMap from a normal Map?
public static <K,V> MultiMap<K,V> invertMap(Map<V,K> map);
I have program-names mapped to an integer of how ... |
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Hi everyone, I'm new to Java and i'm facing some problems with Multimap tools. I've got a text file that i parsed to collect some datas. In every single line, i collect the sequence Id, the gene names and its corresponding alleles and optionnaly the comments about the sequences (if there's one). The aim of my work is first to sort ... |
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Hi everyone, I'm new to Java and i'm facing some problems with Multimap tools. I've got a text file that i parsed to collect some datas. In every single line, i collect the sequence Id, the gene names and its corresponding alleles and optionnaly the comments about the sequences (if there's one). The aim of my work is first to sort ... |
Right now, for you, an array or List represents one row. That is not a good approach. What does one row mean to you? Is it grades on a series of tests? Various performance measurements for some new material you're developing? One person's answers to survey questions, and each row is a different person? Whatever it is, define a class that ... |
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I'm also not seeing your MessageDB.add(Message) method. How do you actually put the Messages into your Map? You should go through and add println()s in strategic locations to track what's actually happening in the code when you do comparisons and such. That'll be a big help in finding where it's not doing what you want. |