treemap Questions
8
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I want to get random keys and their respective values from a Map. The idea is that a random generator would pick a key and display that value. The tricky part is that both key and value will be str...
Transcribe asked 29/3, 2012 at 5:48
7
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I have been using this javascript library to create treemap on webpages and it works great. The issue now is that I need to include this in a powerpoint presentation that I am generating on the ser...
Godolphin asked 13/9, 2015 at 10:56
0
CODE IS HERE is a nice and simple example of TreeMap in java to keep track of the key-value pairs added to the map in a sorted order. However, I am unsure on how to ensure that I only keep 10 items...
14
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Description | A Java program to read a text file and print each of the unique words in alphabetical order together with the number of times the word occurs in the text.
The program should d...
Odyl asked 19/11, 2008 at 15:55
2
Way1:
TreeMap<Integer, String> map = new TreeMap<Integer, String>();
int highestKey = map.lastKey();
Source Code of TreeMap.lastKey() from JDK:
Entry<K,V> p = root;
if (p !...
Bureau asked 5/2, 2016 at 4:43
5
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I used a TreeMap where the key is a String and the value is of type Integer. When I output the Map object, it's not printing in sorted order.
Here's the code I used:
TreeMap<String, Integer>...
1
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I have some hierarchical data, e.g.,
> library(dplyr)
> df <- data_frame(id = 1:6, parent_id = c(NA, 1, 1, 2, 2, 5))
> df
Source: local data frame [6 x 2]
id parent_id
(int) (dbl)
...
2
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I have read many articles on Red black tree where it take O(log n) time for operations .I am not very clear how it works and how actually tree map uses red black tree algorithm to balance the tree ...
Brunet asked 3/8, 2015 at 5:9
6
Solved
i have a hashmap like this:
HashMap<String,Integer> map = new HashMap<String,Integer>();
map.put("java",4);
map.put("go",2);
map.put("objective-c",11);
map.put("c#",2);
now i want to...
Tullus asked 17/9, 2014 at 20:38
3
I'm new to working with D3, and I'm finding it very humbling.
My goal is to make a treemap from a CSV file. I want to use CSV format because I'll be working with values in a spreadsheet, and it's ...
Liquidate asked 3/11, 2013 at 23:3
4
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I am migrating my Java code base to pure Scala and I am stuck on this one piece of code. I have an implementation of an IntervalMap i.e. a data structures that let's you efficiently map ranges [fro...
Dispassion asked 14/5, 2013 at 8:42
3
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I am trying to create a Map with sorted keys, sorted according to alphabetically first, and numerical last. For this I am using a TreeMap with a custom Comparator:
public static Comparator<Str...
Aftercare asked 13/5, 2015 at 15:54
3
Solved
Is it possible to make a treemap in d3 with the background of each rectangle be an image? I am looking for something similar to what was done in Silverlight here, but for d3. If it is possible, are...
1
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I'm using Martijn Tennekes's treemap package (version 2.2) in R (version 3.1.2) using RStudio (version 0.98.1091). It's working great but there's one thing I'd like to do - resize the output.
My c...
1
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I'd like to sort a map with strings, so that certain strings are prioritized and the rest is ordered as usual.
Like this:
"Dan", "value" //priority 1
"Eric", "value" //priority 2
"Ann", "value"...
1
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I have the following Key : Value pairs.
A56:A64=9, A65:A73=9, A2:A8=7, A49:A55=7, A20:A26=7, A9:A19=11, A43:A48=6, A27:A42=16
I want to sort them in an ascending order. I tried using a Tre...
2
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What is the time complexity of TreeMap.lastKey() part of the SortedMap interface?
The oracle docs mention this about TreeMaps:
This implementation provides guaranteed log(n) time cost for the ...
Hyponitrite asked 8/12, 2014 at 18:55
3
Solved
I am trying to sort a map based on word frequency (i.e., based on value). For that I have overridden comparator and passed to TreeMap, but I am getting this weird output.
public class WordFrequenc...
Hydroplane asked 31/10, 2014 at 4:31
1
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In one of the posts I saw that TreeMap takes O(log(n)) time for get/put.
Can someone please answer why it takes O(log(n)), even when it can search directly through get/put using key?
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2
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Map<Integer, String> map = new TreeMap<Integer, String>();
// Add Items to the TreeMap
map.put(new Integer(8), "Eight");
map.put(new Integer(9), "Nine");
map.put(new Integer(1), "...
3
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I need to display Map using <h:dataTable>. My backing bean has a Map property as below:
public class Bean {
private Map<Integer,String> map; // +getter
@PostConstruct
public void ...
3
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I have the following TreeMap:
private Map<Date,WeekSchedule> weeks = new TreeMap<Date,WeekSchedule>();
And I need to remove all entries, whose date is before a given value.
What is...
Mariano asked 29/5, 2014 at 15:12
1
Solved
I was going through the source code of TreeMap in JAVA.
As per JAVA doc:
A Red-Black tree based NavigableMap implementation. The map is sorted according to the natural ordering of its keys, or by ...
Rivalee asked 24/1, 2014 at 10:1
2
Solved
I have a TreeMap which has a string key and the value part is a List with atleast four values.
Map<String,List<String>> mMap = new TreeMap<String,List<String>>();
I am u...
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