What is the difference between a Map and a Dictionary? I am not asking for how they are defined in language X or Y(which seems to be what generally people are asking here on SO), I want to know what is their difference in theory. I know a Map is an object that maps keys to values. Isn't a Dictionary the same? Thanks ...
I'm parsing some input which produces a tree structure containing NSDictionary instances on the branches and NSString instance at the nodes. After parsing, the whole structure should be immutable. I feel like I'm jumping through hoops to create the structure and then make sure it's immutable when it's returned from my method. We can p...
Hi All I need something like a Dictionary or a SortedList but i keep getting exceptions thrown when it receives two things that are the same... Is there another way around this? Thanks ...
This is a three part question. One: Would using a Dictionary<String,Object> be a good way of saving data where it would be Dictionary<Key,Value> as the basis? Two: What would be a better way without using app.settings or xml? Three: How would you serialize this(Or the better solution) into a binary format that is compact and se...
Hi, whenever i try to serialize the dictionary i get the exception: System.ArgumentException: Type 'System.Collections.Generic.Dictionary`2[[Foo.DictionarySerializationTest+TestEnum, Foo, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]' ...
Hi all - I'm creating an arbitrary number of instances (using for loops and ranges). At some event in the future, I need to change an attribute for only one of the instances. What's the best way to do this? Right now, I'm doing the following: 1) Manage the instances in a list. 2) Iterate through the list to find a key value. 3) Once I ...
Hi, I am writing a parser, which call some functions dependent on some value. I can implement this logic with simple switch like this switch(some_val) { case 0: func0(); break; case 1: func1(); break; } or with delegates and dictionary like this delegate v...
heya, This is a followup questions to this one: http://stackoverflow.com/questions/2901422/python-dictreader-skipping-rows-with-missing-columns Turns out I was being silly, and using the wrong ID field. I'm using Python 3.x here, btw. I have a dict of employees, indexed by a string, "directory_id". Each value is a nested dict with e...
I need to pass a Dictionary (with max 20,000 entries) to a WCF service. Can I pass it all by once? void SubmitDictionary(Dictionary<string, MyEntry> val); where MyEntry is : class MyEntry { string Name; long Age; } Is there a configuration for size of the value passed? Or can we pass as large data as this? ...
Hi, Iam looking for a good PHP web api for Dictionary. ...
AS3 Code: import flash.utils.Dictionary; var num1:Number = Number.NaN; var num2:Number = Math.sqrt(-1); var dic:Dictionary = new Dictionary( true ); trace(num1); //NaN trace(num2); //NaN dic[num1] = "A"; trace( num1 == num2 ); //false trace( num1 === num2 ); //false trace( dic[num1] ); //A trace( dic[num2] ); //A Concerning the key co...
Can I use C# Dictionary on classes like arrays?? Dictionary<double[],double[]> I am afraid that it will not be able to tell when arrays are equal... EDIT: Will the hashing method in the dictionary take well care of arrays? or just hashing their references? ...
Does anyone know what C# compiler does under the hood with the following code? dict = new Dictionary<int, string>() { { 1, "value1" }, { 2, "value2" } } It is not clear to if it creates the KeyValuePair instances and call the Add method, or do something more optimized. Does anyone of you know it? ...
What's a correct and good way to implement __hash__()? I am talking about the function that returns a hashcode that is then used to insert objects into hashtables aka dictionaries. As __hash__() returns an integer and is used for "binning" objects into hashtables I assume that the values of the returned integer should be uniformly dist...
Hi, In some special cases you will need a list of textboxes (to deal with n - n associations) whose id is not know before runtime. Something like this : http://screencast.com/t/YjIxNjUyNmU In that particular sample I'm looking to associate a count to some of my 'templates'. in ASP.Net MVC 1 I coded a Dictionary ModelBinder to have a c...
Just curious as to why Dictionary is not supported by XmlSerializer? You can get around it easily enough by using DataContractSerializer and writing the object to a XmlTextWriter, but what are the characteristics of a Dictionary that makes it difficult for a XmlSerializer to deal with considering it's really an array of KeyValuePairs. ...
I'm trying to store a user list in a config file. I've been looking at DictionarySectionHandler and NameValueSectionHandler. I'm not too sure what the difference between these two is, but anyway, neither of them do exactly what I'd like. You can add a custom config section like so: <configSections> <section name="userAges" type="S...
I'm trying to implement this tag cloud: http://thetagcloud.codeplex.com/ ...and I need the replace the hard-coded values below with those coming from my database? <%= new TagCloud( new Dictionary<string, int> { {"C#", 58}, {"ASP.NET", 45}, {"VB.NET", 36}, ...
I want to get use of dictionary items like I do in List generic class, e.g; foreach(item in ItemList) { item.BlaBla; } But in dictionary there s no chance, like e method above... Dictionary<string, HtmlInputImage> smartPenImageDictionary; I mean I got to know the key item for the dictionary item.. but what I want, I want to trave...
Guys, I have this dict in python; d={} d['b']='beta' d['g']='gamma' d['a']='alpha' when i print the dict; for k,v in d.items(): print k i get this; a b g it seems like python sorts the dict automatically! how can i get the original unsorted list? Gath ...