No Hashtable.Get(key) method?

[Guest]

Hello,

I´m trying to implement a "reverse index table" using a hashtable.

But in the hashtable class i cannot find any get-Method.
The Java class of hashtable for example provides a method:
get(Object key)

Isn´t there any method in C# too?

If not... how to retrieve a value of a specific key?

And another question...

As I wrote, I have to implement a reverse index table.

This means that I have a class called "Document" and keys as int values.
I have to assign several Documents to one key. How would you do that to
get a most performant way?

My plan was to use a Hashtable in combination with a List.
Means I have int as keys for my Hashtable and putting my Document
objects into a List which I put into the Hashtable as value to a
specific key.

Is this a good idea?
I thought it very performant, because you can search very fast in a
Hashtable.



Regards,

Martin

 

[Guest]

But in the hashtable class i cannot find any get-Method.
The Java class of hashtable for example provides a method:
get(Object key)

Isn´t there any method in C# too?

C# support the syntax:

yourhastableobject[thekey]

Arne

 

[Greg Young]

The default indexor will do this ...


MyHash[key] or you can use the Item property
http://msdn2.microsoft.com/en-us/library/system.collections.hashtable.item.aspx

Cheers,

Greg

 

[Guest]

This means that I have a class called "Document" and keys as int values.
I have to assign several Documents to one key. How would you do that to
get a most performant way?

My plan was to use a Hashtable in combination with a List.
Means I have int as keys for my Hashtable and putting my Document
objects into a List which I put into the Hashtable as value to a
specific key.

Is this a good idea?
I thought it very performant, because you can search very fast in a
Hashtable.

Hashtable of ArrayList is a known data structure.

Sounds OK to me.

If you are on .NET 2.0 then you should use Dictionary of List
ofcourse !

Arne

 

[Bob Powell [MVP]]

Just use the indexer eg.

table[key]

--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
http://www.ramuseco.com

Find great Windows Forms articles in Windows Forms Tips and Tricks
http://www.bobpowell.net/tipstricks.htm

Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/faqmain.htm

All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.