Mixed types in multidimensional arrays

[Anil Gupte]

How can I dimension an array like this:

dim info(a as integer, b as string) so I can store somthing like
{{"John", 10}{"Dan", 20}{"Jane", 30}}

I want to be able to sort this array too, but I think I can swing that if I
know how to create this array or whatever else method is needed.
--
Anil Gupte

https://www.keeninc.net

www.icinema.com

[Theo Verweij]

Re: Mixed types in multidimensiona l arrays

Public struct Storage
Dim a as Integer
Dim b as String
End Struct

Dim info() as Storage

Anil Gupte wrote:

How can I dimension an array like this:
>
dim info(a as integer, b as string) so I can store somthing like
{{"John", 10}{"Dan", 20}{"Jane", 30}}
>
I want to be able to sort this array too, but I think I can swing that if I
know how to create this array or whatever else method is needed.

[Theo Verweij]

Re: Mixed types in multidimensiona l arrays

Sorry, it must be:

Public structure Storage
Dim a As Integer
Dim b As String
End Structure

Dim Info() as storage

Theo Verweij wrote:

Public struct Storage
Dim a as Integer
Dim b as String
End Struct
>
Dim info() as Storage
>
Anil Gupte wrote:

>How can I dimension an array like this:
>>
>dim info(a as integer, b as string) so I can store somthing like
>{{"John", 10}{"Dan", 20}{"Jane", 30}}
>>
>I want to be able to sort this array too, but I think I can swing that
>if I know how to create this array or whatever else method is needed.

[Anil Gupte]

Re: Mixed types in multidimensiona l arrays

In that case, I may as well as create a class, right? I understand
Structures are "passe" in OOP?

Only problem is, creating a class that is an array sounds daunting....

--
Anil Gupte

https://www.keeninc.net

www.icinema.com

"Theo Verweij" <tverweij@xs4al l.nlwrote in message
news:OT6hZY4%23 GHA.1784@TK2MSF TNGP04.phx.gbl. ..

Sorry, it must be:
>
Public structure Storage
Dim a As Integer
Dim b As String
End Structure
>
Dim Info() as storage
>
Theo Verweij wrote:

>Public struct Storage
> Dim a as Integer
> Dim b as String
>End Struct
>>
>Dim info() as Storage
>>
>Anil Gupte wrote:

>>How can I dimension an array like this:
>>>
>>dim info(a as integer, b as string) so I can store somthing like
>>{{"John", 10}{"Dan", 20}{"Jane", 30}}
>>>
>>I want to be able to sort this array too, but I think I can swing that
>>if I know how to create this array or whatever else method is needed.

[Herfried K. Wagner [MVP]]

Re: Mixed types in multidimensiona l arrays

"Anil Gupte" <anil-list@icinema.co mschrieb:

How can I dimension an array like this:
>
dim info(a as integer, b as string) so I can store somthing like
{{"John", 10}{"Dan", 20}{"Jane", 30}}
>
I want to be able to sort this array too, but I think I can swing that if
I know how to create this array or whatever else method is needed.

Check out the chapter about "jagged arrays" in the documentation.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Jay B. Harlow]

Re: Mixed types in multidimensiona l arrays

Anil,

Structures are "passe" in OOP?

No! Why would you think that?

Structures are used when you need to define "Value Types" within .NET

http://msdn.microsoft.com/library/de...Guidelines.asp

Basically when you need a type that:
- acts like primitive types (acts like an integer)
- Have an instance size under 16 bytes
- Are immutable
- Value semantics are desirable.

Although Classes are more commonly used in .NET, Structures still offer all
the major tenets of OO (Encapsulation, Abstraction, Polymorphism).. .

Considering there is significantly more to inheritance then the common
Implementation Inheritance found with Classes...

Only problem is, creating a class that is an array sounds daunting....

You wouldn't create a class that is an array, you would create an array of a
specific type. That specific type can be either a reference type (Class) or
a value type (Structure)

In the example you gave, an array of Structures might be easier to use then
an array of Classes...

--
Hope this helps
Jay B. Harlow
..NET Application Architect, Enthusiast, & Evangelist
T.S. Bradley - http://www.tsbradley.net


"Anil Gupte" <anil-list@icinema.co mwrote in message
news:emv2DI5%23 GHA.4800@TK2MSF TNGP05.phx.gbl. ..

In that case, I may as well as create a class, right? I understand
Structures are "passe" in OOP?
>
Only problem is, creating a class that is an array sounds daunting....
>
--
Anil Gupte

https://www.keeninc.net

www.icinema.com
>
"Theo Verweij" <tverweij@xs4al l.nlwrote in message
news:OT6hZY4%23 GHA.1784@TK2MSF TNGP04.phx.gbl. ..

>Sorry, it must be:
>>
>Public structure Storage
> Dim a As Integer
> Dim b As String
>End Structure
>>
>Dim Info() as storage
>>
>Theo Verweij wrote:

>>Public struct Storage
>> Dim a as Integer
>> Dim b as String
>>End Struct
>>>
>>Dim info() as Storage
>>>
>>Anil Gupte wrote:
>>>How can I dimension an array like this:
>>>>
>>>dim info(a as integer, b as string) so I can store somthing like
>>>{{"John", 10}{"Dan", 20}{"Jane", 30}}
>>>>
>>>I want to be able to sort this array too, but I think I can swing that
>>>if I know how to create this array or whatever else method is needed.

>
>

[Tim Patrick]

Re: Mixed types in multidimensiona l arrays

To provide a custom sorting algorithm, implement the IComparable interface
in the class, and then craft the CompareTo override. If you look up "IComparabl e
interface, about IComparable interface" in the on-line help, it will provide
an example.

-----
Tim Patrick
Start-to-Finish Visual Basic 2005

How can I dimension an array like this:
>
dim info(a as integer, b as string) so I can store somthing like
{{"John", 10}{"Dan", 20}{"Jane", 30}}
>
I want to be able to sort this array too, but I think I can swing that
if I know how to create this array or whatever else method is needed.
>

[Anil Gupte]

Re: Mixed types in multidimensiona l arrays

Thanx yes,that does help. I have read about Enums, now I will go read up on
structures. I was given the impression by some programmer that real OOP
does not include Structs.

Anyway thanx,
--
Anil Gupte

https://www.keeninc.net

www.icinema.com

"Jay B. Harlow" <Jay_Harlow_MVP @tsbradley.netw rote in message
news:8B0709F3-C8DF-42C8-9AA4-DBF8BEF86A4B@mi crosoft.com...

Anil,

>Structures are "passe" in OOP?

No! Why would you think that?
>
Structures are used when you need to define "Value Types" within .NET
>
http://msdn.microsoft.com/library/de...Guidelines.asp
>
Basically when you need a type that:
- acts like primitive types (acts like an integer)
- Have an instance size under 16 bytes
- Are immutable
- Value semantics are desirable.
>
Although Classes are more commonly used in .NET, Structures still offer
all the major tenets of OO (Encapsulation, Abstraction, Polymorphism).. .
>
Considering there is significantly more to inheritance then the common
Implementation Inheritance found with Classes...
>

>Only problem is, creating a class that is an array sounds daunting....

You wouldn't create a class that is an array, you would create an array of
a specific type. That specific type can be either a reference type (Class)
or a value type (Structure)
>
In the example you gave, an array of Structures might be easier to use
then an array of Classes...
>
--
Hope this helps
Jay B. Harlow
.NET Application Architect, Enthusiast, & Evangelist
T.S. Bradley - http://www.tsbradley.net
>
>
"Anil Gupte" <anil-list@icinema.co mwrote in message
news:emv2DI5%23 GHA.4800@TK2MSF TNGP05.phx.gbl. ..

>In that case, I may as well as create a class, right? I understand
>Structures are "passe" in OOP?
>>
>Only problem is, creating a class that is an array sounds daunting....
>>
>--
>Anil Gupte
>www.keeninc.net
>www.icinema.com
>>
>"Theo Verweij" <tverweij@xs4al l.nlwrote in message
>news:OT6hZY4%2 3GHA.1784@TK2MS FTNGP04.phx.gbl ...

>>Sorry, it must be:
>>>
>>Public structure Storage
>> Dim a As Integer
>> Dim b As String
>>End Structure
>>>
>>Dim Info() as storage
>>>
>>Theo Verweij wrote:
>>>Public struct Storage
>>> Dim a as Integer
>>> Dim b as String
>>>End Struct
>>>>
>>>Dim info() as Storage
>>>>
>>>Anil Gupte wrote:
>>>>How can I dimension an array like this:
>>>>>
>>>>dim info(a as integer, b as string) so I can store somthing like
>>>>{{"John", 10}{"Dan", 20}{"Jane", 30}}
>>>>>
>>>>I want to be able to sort this array too, but I think I can swing that
>>>>if I know how to create this array or whatever else method is needed.

>>
>>

>

[Anil Gupte]

Re: Mixed types in multidimensiona l arrays

I think jagged arrays are only avaialble in C#, not VB. I looked in the
dynamc help and also in the books for VB that I have, but there is no
mention of it.

Thanx,
--
Anil Gupte

https://www.keeninc.net

www.icinema.com

"Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.atwrot e in message
news:O4PiiN5%23 GHA.4196@TK2MSF TNGP03.phx.gbl. ..

"Anil Gupte" <anil-list@icinema.co mschrieb:

>How can I dimension an array like this:
>>
>dim info(a as integer, b as string) so I can store somthing like
>{{"John", 10}{"Dan", 20}{"Jane", 30}}
>>
>I want to be able to sort this array too, but I think I can swing that if
>I know how to create this array or whatever else method is needed.

>
Check out the chapter about "jagged arrays" in the documentation.
>
--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Anil Gupte]

Re: Mixed types in multidimensiona l arrays

Thanx!

BTW, What is Start-to-Finish Visual Basic 2005?

--
Anil Gupte

https://www.keeninc.net

www.icinema.com

"Tim Patrick" <invalid@invali d.com.invalidwr ote in message
news:e3b4697610 778c8c96f96278a 62@newsgroups.c omcast.net...

To provide a custom sorting algorithm, implement the IComparable interface
in the class, and then craft the CompareTo override. If you look up
"IComparabl e interface, about IComparable interface" in the on-line help,
it will provide an example.
>
-----
Tim Patrick
Start-to-Finish Visual Basic 2005
>

>How can I dimension an array like this:
>>
>dim info(a as integer, b as string) so I can store somthing like
>{{"John", 10}{"Dan", 20}{"Jane", 30}}
>>
>I want to be able to sort this array too, but I think I can swing that
>if I know how to create this array or whatever else method is needed.
>>

>
>

[Herfried K. Wagner [MVP]]

Re: Mixed types in multidimensiona l arrays

"Anil Gupte" <anil-list@icinema.co mschrieb:

>I think jagged arrays are only avaialble in C#, not VB. I looked in the
>dynamc help and also in the books for VB that I have, but there is no
>mention of it.

Jagged arrays are available in VB too ('Dim x()() As String'). However, as
I missed in my previous post, it's better not to use them because you store
values of different types in the elements.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Tim Patrick]

Re: Mixed types in multidimensiona l arrays

It's a new teach-yourself-Visual-Basic type of book that comes out in about
two weeks. You can find out more at www.timaki.com.

-----
Tim Patrick
Start-to-Finish Visual Basic 2005

Thanx!
>
BTW, What is Start-to-Finish Visual Basic 2005?
>

[Miro]

Re: Mixed types in multidimensiona l arrays

Anil,

As the other posts said as well...

I tried to do the same thing you did as well...
In the end I used a Class.

I didnt know about Struct, but im pretty happy with the way the class
handled it for me.

M.

"Anil Gupte" <anil-list@icinema.co mwrote in message
news:%23hu9oN4% 23GHA.4740@TK2M SFTNGP03.phx.gb l...

>
How can I dimension an array like this:
>
dim info(a as integer, b as string) so I can store somthing like
{{"John", 10}{"Dan", 20}{"Jane", 30}}
>
I want to be able to sort this array too, but I think I can swing that if
I know how to create this array or whatever else method is needed.
--
Anil Gupte

https://www.keeninc.net

www.icinema.com
>
>