hashtable

问题 In code I have a Hashtable named MyHashtable . This Hashtable contains an element with key= "Value" , value= 3 . I'm currently trying to bind this value to a textbox. This is my XAML code: <TextBlock Margin="4" Text="{Binding MyHashtable[Value]}" /> <TextBlock Margin="4" DataContext="{Binding MyHashtable}" Text="{Binding [Value]}" /> Q: Why does the second binding not work, while the first binding works just great? For the second binding I have tried other bindings for the text, such as:

问题 I am wondering what would be the time complexity on Java HashMap resizing when the load factor exceeds the threshold ? As far as I understand for HashMap the table size is always power of 2 an even number, so whenever we resize the table we don't necessary need to rehash all the keys (correct me if i am wrong), all we need to do is to allocate additional spaces without and copy over all the entries from the old table (I am not quite sure how does JVM deal with that internally), correct ?

问题 I am trying to use a hash table to solve a discrete algorithm problem. I am using Shanks baby step giant step algorithm. My hash table contains about 11,000,000 keys and values. I keep getting an out of memory exception. is there any way to 'fix' this? or a different data structure to use? I am using Visual C# Express 2010 with .NET 4.0 Framework 回答1: I feel this is cheating somewhat, but Wikipedia gives a solution "The algorithm requires O(m) memory. It is possible to use less memory by

问题 This should be very simple - I need to return an array of hashtables from a function. This works when there is more than one hashtable, but when there is only one then the result is not an array. I'd rather not test if the result is an array or not. function GetArrayWith1Hashtable() { $array = @() $hashtable = @{} $hashtable["a"] = "a" $hashtable["b"] = "b" $hashtable["c"] = "c" $array += $hashtable Write-Host "GetArrayWith1Hashtable array.Length =" $array.Length Write-Host

问题 I have a scenario at work where we have several different tables of data in a format similar to the following: Table Name: HingeArms Hght Part #1 Part #2 33 S-HG-088-00 S-HG-089-00 41 S-HG-084-00 S-HG-085-00 49 S-HG-033-00 S-HG-036-00 57 S-HG-034-00 S-HG-037-00 Where the first column (and possibly more) contains numeric data sorted ascending and represents a range to determine the proper record of data to get (e.g. height <= 33 then Part 1 = S-HG-088-00, height <= 41 then Part 1 = S-HG-084-00

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . Since language standards rarely mandate implementation methods, I'd like to know what is the real world hashing method used by C++ standard library implementations (libc++, libstdc++ and dinkumware). In case it's not clear, I expect the answer to be a method like these : Hashing

问题 I have implemented session state mode sqlserver and when i run my application i am facing XML serialization error of hash table . and my class looks like: [Serializable] public class ProjectSetup{ private System.Collections.Hashtable _ConfigTable; //and other properties here public System.Collections.Hashtable ConfigTable { get { return _ConfigTable; } } } Now i want to know how to serialize the hastable or if there is another alternative please let me know. and exactly error is: "Cannot

问题 I inserted some data into a Java Hashtable. If I read the data from the Hashtable it doesn't come back in the same order that I inserted it in. How do I get the ordered data from the Hashtable? I use the following code to get the values from the hashtable: // Get a set of the entries Set set = hsUpdateValues.entrySet(); // Get an iterator Iterator i = set.iterator(); // Display elements while (i.hasNext()) { Map.Entry me = (Map.Entry) i.next(); System.out.print( "Key : " + me.getKey() + ",

问题 Is there a way of converting a hash table into a list of (key,pair) values in OCaml? I'm aware that, given a hash table ht we can do BatList.of_enum (BatHashtbl.enum ht) using the batteries library. This would convert the table to an enumeration and then convert the enum to a list. But I'm looking for a solution that doesn't use the Batteries Library. In the standard OCaml Hashtbl Module there doesn't seem to be a way of extracting the pairs as a list or a way of combining its functions to

问题 Is there a way of converting a hash table into a list of (key,pair) values in OCaml? I'm aware that, given a hash table ht we can do BatList.of_enum (BatHashtbl.enum ht) using the batteries library. This would convert the table to an enumeration and then convert the enum to a list. But I'm looking for a solution that doesn't use the Batteries Library. In the standard OCaml Hashtbl Module there doesn't seem to be a way of extracting the pairs as a list or a way of combining its functions to