I have a TreeMap<Date, Integer> and I want to fetch the nth item from that map. What I came up with now is this: ((Integer)myTreeMap.values().toArray()[index]).intValue(); but this feels q...

I have a tree map declared as follows: TreeMap<Integer, Integer> tree = new TreeMap<Integer, Integer>(); How do I retrieve the key with the maximum value. Is there an O(1) way of ach...

I need a Collection that sorts the element, but does not removes the duplicates. I have gone for a TreeSet, since TreeSet actually adds the values to a backed TreeMap: public boolean add(E e) { ...

I need to annotate a pylab rectangle with few data lines - which are of different length. Searching through the matplotlib documentation, and Googling, I could not find a way to give different part...

Seems they both let you retrieve the minimum, which is what I need for Prim's algorithm, and force me to remove and reinsert a key to update its value. Is there any advantage of using one over the ...

I just use the treemap type of EChart to show the data. But I meet a problem. And the label option shows as the following: itemStyle:{ normal:{ label:{ show :true, formtter:"{b}"} If my data n...

Java's getOrDefault was a nice construct for one line access to a map value or the starting point if one does not exist. I do not see anything in the map reference in C++ with a parallel. Does some...

In Java you can build up an ArrayList with items and then call: Collections.sort(list, comparator); Is there anyway to pass in the Comparator at the time of list, creation like you can do with T...

I recently saw this treemap chart from https://www.kaggle.com/philippsp/exploratory-analysis-instacart (two levels of hierarchy, colored, squarified treemap). It is made with R ggplot2::treemap, b...

I have a Map<Float, MyObject> What is the best way to keep the map sorted according to the float? Is SortedMap or TreeMap the best answer? How do I use it? I only create the map once and re...

I'm implementing a simple treemap in Python using Squarify. I'm plotting the artist name with it's percentage of streams in the considered song chart, the bigger/darker the square, the higher is th...

For representing most popular artists from EchoNest API, I've been trying to set-up Silverlight Toolkit's TreeMap using images, their TreeItemDefinition.ValueBinding being defined as the area of th...

I want to write code like this - for (Map.Entry<Long, Integer> e : map.entrySet()){ map.remove(k); map.put(x, value); } but I got java.util.ConcurrentModificationException I tried to use...

I know this is a noob a question, but I couldn't find a simpe answer anywhere else. Question is: I need to write a method that returns a SortedMap, so a tree map should work just fine. I have a Ha...

When I use Iterator to iterate some TreeMap, I found the same Map.Entry's content will change. For example: import java.util.Map.Entry; import java.util.TreeMap; public class Solution { public st...

I am using plotly express to make a treemap. I would like to annotate my data sectors with a label as well as the % of the parent and the value that is used in the color scale. How can I add an ann...

I have a map whose keys are in MMMyyyy format and i need to sort based on month. input: unsorted: { "Dec2010": 1, "Apr2010": 1, "Feb2010": 0, "Nov2010": 2, "Mar2010": 0, "Jun2010": 2, "Sep...

I have a project that I'm working on for my Java class (obviously) and I must have missed the lecture on how to interact with TreeMaps. I have no idea what I'm doing with this part and I'm not find...

Most places I've consulted say to use SortedList, but the problem is that the program I'm porting actually uses duplicate keys (differentiated by order), which is permissible with TreeMap, but not ...

I want to know that if using an Iterator over a TreeMap in Java interfere with the order of keys?

Is there a built-in sorted dictionary implementation in Python 2.6, or are hashtables the only kind? Clarifications: I'm asking about sorted dictionarys, not ordered dictionaries!

I am calling function that returns TreeMap instance, and in the calling code I wanted to modify the TreeMap. However, I am getting a ConcurrentModificationException. Here is my code: public Map&l...

How can I sort a treemap using its values rather than the key?

From the following code, I understand that, there is no need of overriding equals() and hashCode() method for TreeSet and TreeMap, neither for sorting, nor searching. public class ComparableTest i...

How to prevent DoS attack through Java TreeMap? My code has an API which accepts a Map object. Now I want to prevent client to send Map objects of certain length. Now maxarray in jdk.serialFilter...