No Hashtable.Get(key) method?

[Martin Pöpping]

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

[Arne Vajhøj]

Re: No Hashtable.Get(k ey) method?

Martin Pöpping wrote:

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:

yourhastableobj ect[thekey]

Arne

[Arne Vajhøj]

Re: No Hashtable.Get(k ey) method?

Martin Pöpping wrote:

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

[Greg Young]

Re: No Hashtable.Get(k ey) method?

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

"Martin Pöpping" <martin_p@despa mmed.comwrote in message
news:ee4gvk$qim $1@newsreader2. netcologne.de.. .

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

[Bob Powell [MVP]]

Re: No Hashtable.Get(k ey) method?

Just use the indexer eg.

table[key]

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

Ramuseco Limited .NET consulting

http://www.ramuseco.com

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http://www.bobpowell.net/tipstricks.htm

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http://www.bobpowell.net/faqmain.htm

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"Martin Pöpping" <martin_p@despa mmed.comwrote in message
news:ee4gvk$qim $1@newsreader2. netcologne.de.. .

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