treemap

问题 I'm new to d3js. I've gone through several examples of the treemap visualization and noticed that the data has the same hierarchical structure: { "name": "flare", "children": [ ... ] ... } But what if I have an array of objects with same set of properties without nesting: [ { "CourseID": "15.010B", "Subject": "15.01", "Section": "B", "Department": "Managerial Economics", "Professor": "Doyle", ... }, { "CourseID": "15.010B", "Subject": "15.01", "Section": "B", ... }, ... ] Should I make it

问题 I'm experimenting with implementing a treemap using D3.js and the following example: http://mbostock.github.com/d3/ex/treemap.html So far it works pretty good. My problem is if I would like to refresh the treemap items using transition for a completely new set of data, I cannot do it. I can only do this if I reinitialize the treemap object. Let's take a simple example: DATASET1: PROD1, PROD2, PROD3... DATASET2: LOC1, LOC2, LOC3, LOC4... I would like to have a transition animation when

问题 I would like to use HashMaps<String, V> where the value type V should be a two dimensional int array ( int[][] ). Map<String,int[][]> map = new HashMap<>(); int[][] a = new int[][]{ {1, 2} }; map.put("test", a); System.out.println("Test:" + map.containsKey("test")); // Test: true System.out.println("key ==== " + map.get("test")); // Key === [[I@19a8942 I am trying to have a key that access a unique value i.e. a 2-dimensional array, the size of the array is fixed array[1][3] , this is constant

问题 I have a Map<String, Integer> otherMap which maps properties of strings to some associated integer values. Now I would like a TreeMap<String, String> that orders the keys according to the associated integers in otherMap . How should I tackle this problem, and what's important to keep in mind? (This is a follow-up on this question.) 回答1: When writing a comparator it's important to ensure that the results are consistent (i.e. are the same over time) and that it implements a total order. When

问题 I am trying to sort a TreeMap on key. Key is some custom DataStructure having int, List, String, etc. The member on which I am expecting a sort has some duplicates. Let's say that member is Rank. More than 1 object can have same rank. Simplified version example: NOTE: in the CompareTo method below 0 is not returned intentionally to NOT ignore duplicates.(Please correct me if this is not the right way to avoid duplicates) import java.util.TreeMap; public class TreeTest { public static void

问题 How can we set depth of a TreeMap object. Suppose we are trying to build an auto suggest feature on top of underlying data structure of a TreeMap, how would depth of a tree as we know affect the performance? 回答1: Your question is vague but if I understand correctly, you're misunderstanding concepts. TreeMap is an implementation of the Map interface which uses red-black tree for sorting its contents into natural ascending order while what you're asking is something completely unrelated;

问题 I'm working with these two groups of key value pairs, which is being returned by another function. I'd like to write a function that will always find the highest key and return its corresponding value. In this example, I'd be returning 2 because 499 is the highest key. The data that I am working with is ({-99 0, 99 0} {-99 2, 499 2}) When I call (type ({-99 0, 99 0} {-99 2, 499 2})) Within the function that is responsible for returning that data it, I get back (clojure.lang.PersistentTreeMap

问题 i have a program where i have to read data from excel file and store them in a database . I am using LinkedHashmap to read each cell as a string and store them. My excel file contains the data: ID Name Salary 43 paulina 1000 5 christine 2349000 54 laura 12587458 49 jim 45878 In my code I have made the fields for the table by the first row of the excel file and then I have filled the table with the rest of the data using again LinkedHashMap. My question is how in this step I can store the data

问题 I'm trying to write a program where the user can: 1) Add a person to the contact (name, phone, email), 2) Remove a person from the contacts, 3) Read all from contact. The Way I'm doing this is I'm asking for the user for their choice and respectively does whatever. For writing, I simply write an object to the file. For removing, I think I'll be asking the user for "last name" which will be used as the KEY (since I'm using a TreeMap)and will remove the value (object) at the key. So I'm having

问题 I wanted to know if its possible to design breadcrubms in highchart treemap. For now, there is only a back button which helps in getting back to the first level from 2nd drill down. I am expecting something like this for example : if first level has tiles like animals, vegetables, fruits. second level would be animal names, vegetable names etc. so when i click on animal tile, it will display all the animal names and the breadcrumb should look like : project>>animals and if i select vegetables