sortedlist

问题 i have a generic sorted list "results" with key = some filename and value = boolean. I would like to sort the list by the boolean entry or value column. does anyone know how i can do this? Thanks! 回答1: SortedList is optimized so that inertions occur in an ordered fashion, such that enumeration occurs in a sorted order at minimal cost. Anything else requires a re-sort. Thus: SortedList<string,bool> l=new SortedList<string, bool>(); l.Add("a",true); l.Add("a",false); l.Add("b",true); l.Add("b"

问题 I have an ArrayList which stores Date s and I sorted them in descending order. Now I want to display them in a ListView . This is what I did so far: spndata.setOnItemSelectedListener(new OnItemSelectedListener() { public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long arg3) { switch (position) { case 0: list = DBAdpter.requestUserData(assosiatetoken); for (int i = 0; i < list.size(); i++) { if (list.get(i).lastModifiedDate != null) { lv.setAdapter(new MyListAdapter(

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed last year . Why is there only a SortedList<TKey, TValue> which looks more like a dictionary, but no SortedList<T> that is actually just a list that is always sorted? According to the MSDN documentation on SortedList, it is actually internally implemented as a dynamically-sized array of

问题 I have a list ["Roll_Number","Marks in subjects"]: list_1=[(1,22),(1,22),(2,29),(2,16),(3,56),(4,32),(4,12)] I tried this code in python to get sum of all subjects for each roll_no : sub_sum = [0] * 4 #Roll No :4 if i in range(0,len(list1)): if k in range(0,5): if (list1[i][0]==k): sub_sum[k] = list1[i][1] + sub_sum[k] i=i+1 else: k=k+1 break Getting an infinite loop. Expected Result : 1:44 , 2:45, 3:56 , 4:44 Thanks in advance. 回答1: You can do that as follows: from collections import

问题 I am binding a SortedListbox to an WPF combo box. everything was fine. The problem happend when i select the first [only the first] item. The problem is that SelectedValue doesnt change when a new item is selected after selecting first item. Suppose SelectedValue of the first item is '1' and the SelectedValue of third item in the combo is '3'. If i select the first item and then selected the third item. SelectedValue remains'1', when '3' is expected. Any 1 faced similar problems. Regards,

问题 I have two JLists to move items back and forth between. I add items with a number value in front so example. 1. A 2. B 3. C ... 10. j The problem is that the list currently sorts as 1. 10. 2. 3., the 10. comes right after the one and isn't the last item as it should be by numerical sort. Can someone shed some light on this or help me fix this please? Thank you! import java.awt.*; import java.awt.List; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.*;

问题 SortedList<string, systemuser> Users = new SortedList<string, systemuser>(); Users.Add("username1",customobject); Users.Add("username2",customobject); Users.Add("username3",customobject); What i'm trying to do is search the list for a specific key (i.e. a username) and return the next item in the list. If i'm at the end of the list then I need to return the item in the first position. Not sure how to go about this, as the SortedList doesn't seem to expose an index property. I have: foreach

问题 I have a SortedList in my code. I fill inside it key value pairs. When I add an item to SortedList it sorts automatically by key. But i need to sort it by value. Because the values are visible texts in a combobox. They must be alphabetically sorted. I decided to write a class and inherit from SortedList class and override the Add method. But when I looked at the code of Microsoft's SortedList class, I see there is an Insert method and it makes the sorting and unfortunately it is private so I

问题 I am using a TableView to visualize a SortedList backed up by an ObservableList. The comparator of the SortedList is bound to the comparator of the TableView: sortedList().comparatorProperty().bind(tableView.comparatorProperty()); The SortedList sorts as expected (by the comparator of the TableView chosen) when I add an item to the underlying ObservableList. Although when I change a Property of the ObservableList (with a CheckBoxTableCell, but that shouldn't matter), the SortedList doesn't

问题 I am implementing a sorted list using linked lists. My node class looks like this public class Node<E>{ E elem; Node<E> next, previous; } In the sorted list class I have the add method, where I need to compare generic objects based on their implementation of compareTo() methods, but I get this syntax error "The method compareTo(E) is undefined for type E". I have tried implemnting the compareTo method in Node, but then I can't call any of object's methods, because E is generic type. Here is