The CompareTo() method for my class is dynamic, and can range from a simple comparison to comparisons on a number of columns. This is all determined at run time, and it works great. But in some cases, I want any attempt to sort a collection of my objects using the default comparison to just do nothing. Having CompareTo() just return a ...
I have a simple test object model in which there are schools schools have a collection of students. I would like to retrive a school and all its students who are above a certain age. I carry out the following query in the following manner : public School GetSchoolAndStudentsWithDOBAbove(int schoolid, DateTime dob) { va...
I have two String arrays a,b. String a [] = {"one","two","three"}; String b [] = {"one","Two","Three","four"}; I need to check whether both arrays are same or not , with case Insensitive . I know , the following piece of code is perfect for case sensitive. List <String> l1 = Arrays.asList(a); List <String> l2 = Arrays.asList(b);...
I have the following code: private static final Set<String> allowedParameters; static { Set<String> tmpSet = new HashSet(); tmpSet.add("aaa"); allowedParameters = Collections.unmodifiableSet(tmpSet); } And it cause: Note: mygame/Game.java uses unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for detai...
How to make a Array List read only, so no one can add, edit or delete, once after the initialization in Java ...
The scenario is really simple. I have a read-only collection property of my custom control, and I want set the items of the collection in XAML. Like this: <l:CustomControl> <l:CustomControl.ControlItems> <l:CustomItem /> <l:CustomItem /> </l:CustomControl.ControlItems> </l:CustomControl> The ControlItems property has in...
I have a list of objects and I need to find an object as quickly as possible (by it's name property). What data-structure should I use? I know I can use a Dictionary, but there wont ever be more than 10 items in the list, and if I remember correctly the dictionary is implemented as an array if the collection contains 10 items or less. T...
I have two classes: Employee and EmployeeGridViewAdapter. Employee is composed of several complex types. EmployeeGridViewAdapter wraps a single Employee and exposes its members as a flattened set of system types so a DataGridView can handle displaying, editing, etc. I'm using VS's builtin support for turning a POCO into a data source, w...
I have the following decleration: private Dictionary<string, Dictionary<string, File>> listFiles = new Dictionary<string,Dictionary<string,File>>(); How do i add an item to the dictionary? Is there a better way to do something like this? Info: That stores a sourcefilename, destinationfilename, and the file itself. Edit1: Just figured...
Best explained with code I think, this is just a simple example: public class MyPOJO { public String name; public int age; public MyPOJO(String name, int age) { this.name = name; this.age = age; } } public class MyProcessor { public List<MyPOJO> process(List<MyPOJO> mypojos) { List<MyPOJO>...
Given a collection of named Foos from ActiveRecord, why does Array#include? not seem to call Foo.== but yet index does? class Foo < ActiveRecord::Base def ==(s) self.name == s end end class Bar < ActiveRecord::Base has_many :foos end bar.foos << Foo.new( :name => 'hmm' ) bar.foos.all.include?('hmm') # does select all from ...
I read this article where Ayende states NHibernate can (compared to EF 4): Collection with lazy=”extra” – Lazy extra means that NHibernate adapts to the operations that you might run on top of your collections. That means that blog.Posts.Count will not force a load of the entire collection, but rather would create a “sel...
What is the pattern (best practice) for such problem -- modifying elements (values) in collection? Conditions: size of the collection is not changed (no element is deleted or added) modification is in-place In C++ it was easy and nice, I just iterated trough a collection and changed the elements. But in C# iterating (using enumerato...
I'm working on a java project that will allows users to parse multiple files with potentially thousands of lines. The information parsed will be stored in different objects, which then will be added to a collection. Since the GUI won't require to load ALL these objects at once and keep them in memory, I'm looking for an efficient way t...
I have a list of users in local store that I need to update from a remote list of users every once in a while. Basically: If a remote user already exists locally, update its fields. If a remote user doesn't already exist locally, add the user. If a local user doesn't appear in the remote list, deactivate or delete. If a local user also...
I'm a C++ expert, but not at all for C#. I created a Dictionary<string, STATS>, where STATS is a simple struct. Once I built the dictionary with initial string and STATS pairs, I want to modify the dictionary's STATS value. In C++, it's very clear: Dictionary<string, STATS*> benchmarks; Initialize it... STATS* stats = benchmarks[item.K...
I have problem with JavaConversions with 2.8 beta: import scala.collection.JavaConversions._ class Utils(dbFile : File, sep: String) extends IUtils { (...) def getFeatures() : java.util.List[String] = csv.attributes.toList } And then exception: [INFO] Utils.scala:20: error: type mismatch; [INFO] found : List[String] [IN...
So in Java, whenever an indexed range is given, the upper bound is almost always exclusive. From java.lang.String: substring(int beginIndex, int endIndex) Returns a new string that is a substring of this string. The substring begins at the specified beginIndex and extends to the character at index endIndex - 1 From java.util....
public class GamePiece { public GamePiece(char cLetter, int nPointValue) { m_cLetter=cLetter; m_nPointValue=nPointValue; m_nTurnPlaced=0; //has not been placed on game board yet. } public char GetLetter() {return m_cLetter;} public int GetPointValue() {return m_nPointValue;} public int GetT...
I have an ArrayList that I want to use to hold RaceCar objects that extend the Thread class as soon as they are finished executing. A class, called Race, handles this ArrayList using a callback method that the RaceCar object calls when it is finished executing. The callback method, addFinisher(RaceCar finisher), adds the RaceCar object t...