treemap

问题 I'm interested in using python to make diagrams representing the size of values based on the size of squares (and optionally their colour). Basically I'm looking for a way to make overviews of a bunch of values like the good old program windirstat does with hard-drive usage (it basically makes a big square representing your harddrive and then smaller squares making up the area inside of it representing different programs, the bigger the square the larger the file, colour indicates the type of

问题 I'm interested in using python to make diagrams representing the size of values based on the size of squares (and optionally their colour). Basically I'm looking for a way to make overviews of a bunch of values like the good old program windirstat does with hard-drive usage (it basically makes a big square representing your harddrive and then smaller squares making up the area inside of it representing different programs, the bigger the square the larger the file, colour indicates the type of

问题 I'm interested in using python to make diagrams representing the size of values based on the size of squares (and optionally their colour). Basically I'm looking for a way to make overviews of a bunch of values like the good old program windirstat does with hard-drive usage (it basically makes a big square representing your harddrive and then smaller squares making up the area inside of it representing different programs, the bigger the square the larger the file, colour indicates the type of

问题 I have a list "unSortedDateList" in which dates are stored as CSV. dates are stored in following format (MM/dd/yyyy) 1/10/2012, 2/10/2011, 1/9/2011 * (note: DATES ARE STORE as COMMA SEPERATED VALUE) * I have written a function which takes these dates from the list and sort them in ASC and store in sortedList. TreeMap<Date, Date> sortedMap = new TreeMap<Date, Date>(); for (Date theDate : unSortedDateList) { sortedMap.put(theDate.getTime(), theDate); } List<Date> sortedList = (List<Date>)

问题 I have a list "unSortedDateList" in which dates are stored as CSV. dates are stored in following format (MM/dd/yyyy) 1/10/2012, 2/10/2011, 1/9/2011 * (note: DATES ARE STORE as COMMA SEPERATED VALUE) * I have written a function which takes these dates from the list and sort them in ASC and store in sortedList. TreeMap<Date, Date> sortedMap = new TreeMap<Date, Date>(); for (Date theDate : unSortedDateList) { sortedMap.put(theDate.getTime(), theDate); } List<Date> sortedList = (List<Date>)

问题 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 sort this map by its key length, if two keys length are equal (e.g go and c# both length 2), then sorted by alphba order. so the outcome i expect to get is something like: printed result: objective-c, 11 java, 4 c#, 2 go, 2 here is my own attamp, but it doesnt work at all... HashMap<String,Integer> map = new

问题 How does the TreeMap sort? say for example you have the following map: TreeMap<String, Integer> treemap = new TreeMap<>(); treemap.put("lol", 1); treemap.put("Marc", 2); treemap.put("Jesper", 3); Iterator ittwo = treemap.entrySet().iterator(); while (ittwo.hasNext()) { Map.Entry pairs = (Map.Entry)ittwo.next(); System.out.println(pairs.getKey() + " = " + pairs.getValue()); ittwo.remove(); } The output of this is: Jesper = 3 Marc = 2 lol = 1 So if its not alphabetically what is it then? 回答1:

问题 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 SortedList. Any advice? 回答1: Does SortedDictionary class help? 回答2: Another great implementation of a Red Black Tree in .NET can be found here: http://www.itu.dk/research/c5/ 回答3: I don't think C# has one natively. However there are plenty of examples of Red-Black implementations out there. Here is

问题 I would like to create a TreeMap, using pictures to fill out the treemap rectangles. I can assume that all the pictures have the same width and height (i.e. the aspect ratio). Thus, I need a treemapping algorithm to create the rectangles with a given ratio, do I will be able to put the pictures there (and perhaps scale the pictures if I need). Could you recommend one ? 回答1: In general, a solution is not possible - Albin Sunnanbo has provided a proof by counterexample. Assuming your bounding

问题 How can I sort a treemap using its values rather than the key? 回答1: You cannot as the TreeMap's comparator is run against the keys only, e.g. see this constructor. Anyway, you can use multiple Collections, use the TreeMap (or rather HashMap) for looking up elements by keys, and have a SortedSet to iterate on the values. 回答2: Here is a solution: public static <K, V extends Comparable<V>> Map<K, V> sortByValues(final Map<K, V> map) { Comparator<K> valueComparator = new Comparator<K>() { public