Creating an array

[Robert Dufour]

I need an array with two columns, values in column 1 are datetime and in
column 2 they are numeric with up to two decimal places.

What's the Dim statement to create this?

Any help is greatly appreciated.

Bob

[Scott M.]

Re: Creating an array

If you want to have the 2 data types preserved use an ArrayList object or a
Collection object, rather than a simple single-type array.


"Robert Dufour" <bdufour@sgiims .comwrote in message
news:ev2UJanPHH A.2340@TK2MSFTN GP05.phx.gbl...

>I need an array with two columns, values in column 1 are datetime and in
>column 2 they are numeric with up to two decimal places.
>
What's the Dim statement to create this?
>
Any help is greatly appreciated.
>
Bob
>
>

[Armin Zingler]

Re: Creating an array

"Robert Dufour" <bdufour@sgiims .comschrieb

I need an array with two columns, values in column 1 are datetime
and in column 2 they are numeric with up to two decimal places.
>
What's the Dim statement to create this?
>
Any help is greatly appreciated.

structure Item
public v1 as date
public v2 as decimal
end structure

'...


dim items(17) as item

items(0).v1 = date.now
items(0).v2 = 17.34

with items(1)
.v1 = date.now
.v2 = 17.34
end with


Armin

[Robert Dufour]

Re: Creating an array

Thanks
Bob
"Armin Zingler" <az.nospam@free net.dewrote in message
news:uG3syMoPHH A.4372@TK2MSFTN GP04.phx.gbl...

"Robert Dufour" <bdufour@sgiims .comschrieb

>I need an array with two columns, values in column 1 are datetime
>and in column 2 they are numeric with up to two decimal places.
>>
>What's the Dim statement to create this?
>>
>Any help is greatly appreciated.

>
structure Item
public v1 as date
public v2 as decimal
end structure
>
'...
>
>
dim items(17) as item
>
items(0).v1 = date.now
items(0).v2 = 17.34
>
with items(1)
.v1 = date.now
.v2 = 17.34
end with
>
>
Armin

[Cor Ligthert [MVP]]

Re: Creating an array

Armin,

Is a List Of(item) not nicer?

Cor

"Armin Zingler" <az.nospam@free net.deschreef in bericht
news:uG3syMoPHH A.4372@TK2MSFTN GP04.phx.gbl...

"Robert Dufour" <bdufour@sgiims .comschrieb

>I need an array with two columns, values in column 1 are datetime
>and in column 2 they are numeric with up to two decimal places.
>>
>What's the Dim statement to create this?
>>
>Any help is greatly appreciated.

>
structure Item
public v1 as date
public v2 as decimal
end structure
>
'...
>
>
dim items(17) as item
>
items(0).v1 = date.now
items(0).v2 = 17.34
>
with items(1)
.v1 = date.now
.v2 = 17.34
end with
>
>
Armin

[Armin Zingler]

Re: Creating an array

Hi Cor,

well, he asked for an array, I gave him an array. ;-)

You're right with VB 2005, but as Item is a structure (it doesn't have to
be), it's more complicated if you use it with the generic List. You can not
simply write

items(0).v1 = ...
items(0).v2 = ...

you would have to write

dim i as item

i.v1=..
i.v2=..

items(0) = i

Armin


"Cor Ligthert [MVP]" <notmyfirstname @planet.nlschri eb

Armin,
>
Is a List Of(item) not nicer?
>
Cor
>
"Armin Zingler" <az.nospam@free net.deschreef in bericht
news:uG3syMoPHH A.4372@TK2MSFTN GP04.phx.gbl...

"Robert Dufour" <bdufour@sgiims .comschrieb

I need an array with two columns, values in column 1 are
datetime and in column 2 they are numeric with up to two decimal
places.
>
What's the Dim statement to create this?
>
Any help is greatly appreciated.

structure Item
public v1 as date
public v2 as decimal
end structure

'...


dim items(17) as item

items(0).v1 = date.now
items(0).v2 = 17.34

with items(1)
.v1 = date.now
.v2 = 17.34
end with


Armin

>
>

[_AnonCoward]

Re: Creating an array


"Robert Dufour" <bdufour@sgiims .comwrote in message
news:ev2UJanPHH A.2340@TK2MSFTN GP05.phx.gbl...
:
: I need an array with two columns, values in column 1 are datetime
: and in column 2 they are numeric with up to two decimal places.
:
: What's the Dim statement to create this?
:
: Any help is greatly appreciated.
:
: Bob


Just for the sake of a little diversity...

=============== =============== =============
Option Strict On

Imports Microsoft.Visua lBasic
Imports System
Imports System.Collecti ons.Generic

Public Module [module]
public sub main
Dim dictionary As New Dictionary(Of DateTime, Decimal)
With dictionary
.Add(Date.Now, 12.34D)
.Add(#1/2/2007#, 5678910.11D)
End With

Dim kvp As KeyValuePair(Of Date, Decimal)
For Each kvp In dictionary
Console.WriteLi ne("Key={0}, Value={1}", _
kvp.Key, kvp.Value)
Next
End sub
End Module
=============== =============== =============


Ralf
--
--
----------------------------------------------------------
* ^~^ ^~^ *
* _ {~ ~} {~ ~} _ *
* /_``>*< >*<''_\ *
* (\--_)++) (++(_--/) *
----------------------------------------------------------
There are no advanced students in Aikido - there are only
competent beginners. There are no advanced techniques -
only the correct application of basic principles.

[Mythran]

Re: Creating an array



"Armin Zingler" <az.nospam@free net.dewrote in message
news:udKO#vpPHH A.992@TK2MSFTNG P06.phx.gbl...

Hi Cor,
>
well, he asked for an array, I gave him an array. ;-)
>
You're right with VB 2005, but as Item is a structure (it doesn't have to
be), it's more complicated if you use it with the generic List. You can
not
simply write
>
items(0).v1 = ...
items(0).v2 = ...
>
you would have to write
>
dim i as item
>
i.v1=..
i.v2=..
>
items(0) = i
>
Armin
>
>
"Cor Ligthert [MVP]" <notmyfirstname @planet.nlschri eb

>Armin,
>>
>Is a List Of(item) not nicer?
>>
>Cor
>>
>"Armin Zingler" <az.nospam@free net.deschreef in bericht
>news:uG3syMoPH HA.4372@TK2MSFT NGP04.phx.gbl.. .

"Robert Dufour" <bdufour@sgiims .comschrieb
I need an array with two columns, values in column 1 are
datetime and in column 2 they are numeric with up to two decimal
places.
>
What's the Dim statement to create this?
>
Any help is greatly appreciated.
>
structure Item
public v1 as date
public v2 as decimal
end structure
>
'...
>
>
dim items(17) as item
>
items(0).v1 = date.now
items(0).v2 = 17.34
>
with items(1)
.v1 = date.now
.v2 = 17.34
end with
>
>
Armin

>>
>>

>

In which case you can just add a constructor to the structure that took 2
parameters, the names of the properties to set. Then you could just use:

items(0) = New Item(someDate, someDecimal)

:)

HTH,
Mythran

[Armin Zingler]

Re: Creating an array

"Mythran" <kip_potter@hot mail.comschrieb

You're right with VB 2005, but as Item is a structure (it doesn't
have to
be), it's more complicated if you use it with the generic List.
You can
not
simply write

items(0).v1 = ...
items(0).v2 = ...

you would have to write

dim i as item

i.v1=..
i.v2=..

items(0) = i

>
In which case you can just add a constructor to the structure that
took 2
parameters, the names of the properties to set. Then you could just
use:
>
items(0) = New Item(someDate, someDecimal)
>
:)

Right, but my example doesn't create a new item.


Armin

[Mythran]

Re: Creating an array



"Armin Zingler" <az.nospam@free net.dewrote in message
news:udhxQ9wPHH A.2312@TK2MSFTN GP04.phx.gbl...

"Mythran" <kip_potter@hot mail.comschrieb

You're right with VB 2005, but as Item is a structure (it doesn't
have to
be), it's more complicated if you use it with the generic List.
You can
not
simply write
>
items(0).v1 = ...
items(0).v2 = ...
>
you would have to write
>
dim i as item
>
i.v1=..
i.v2=..
>
items(0) = i
>

>>
>In which case you can just add a constructor to the structure that
>took 2
>parameters, the names of the properties to set. Then you could just
>use:
>>
>items(0) = New Item(someDate, someDecimal)
>>
>:)

>
>
Right, but my example doesn't create a new item.
>
>
Armin

Umm, yeah it did :0

Dim i As Item

is the same as

Dim i As Item = New Item()

where Item is a structure....

:)

Mythran

[Armin Zingler]

Re: Creating an array

"Mythran" <kip_potter@hot mail.comschrieb

>
>
"Armin Zingler" <az.nospam@free net.dewrote in message
news:udhxQ9wPHH A.2312@TK2MSFTN GP04.phx.gbl...

"Mythran" <kip_potter@hot mail.comschrieb

You're right with VB 2005, but as Item is a structure (it
doesn't have to
be), it's more complicated if you use it with the generic
List. You can
not
simply write

items(0).v1 = ...
items(0).v2 = ...

you would have to write

dim i as item

i.v1=..
i.v2=..

items(0) = i

>
In which case you can just add a constructor to the structure
that took 2
parameters, the names of the properties to set. Then you could
just use:
>
items(0) = New Item(someDate, someDecimal)
>
:)

Right, but my example doesn't create a new item.


Armin

>
Umm, yeah it did :0
>
Dim i As Item
>
is the same as
>
Dim i As Item = New Item()
>
where Item is a structure....
>
:)

[After many revisions...]

Yes and no. :-)

My List has as many items as before, so I didn't create a new item.

I am referring to the logical level. I only wanted to show that you can not
simply write

items(0).field = ...

but you have to a) declare a variable b) set the field values c) put the
item in the list. That's why I call it more complicated. That the existence
of the additional declaration of variable i also means the implicit creation
of a new object can not be prevented, but the code's purpose is still
/changing/ an existing item. If I wanted to create a /new/ one I would have
to write Items.Add.


Talking about instances, we know that it is never possible to really change
the item in the List, and we neither get the same object back from the List
that we added, nor the object we add is stored in the list. It is always a
copy because it is a value type.


In other words, if somebody wants to know how to change an item in the List,
I would still answer

dim i as item

i.v1=..
i.v2=..

items(0) = i

On a logical level this is the required change whereas on a "physical" level
it's the creation of (at least) one new object. So, we both are right. :-)


Armin

[Cor Ligthert [MVP]]

Re: Creating an array

Mythran,

You know Armin from the past. This will probably a long thread.

However mostly all threads Armin is involved in are very good to search for
later when they are ready.

Success,

:-)

Cor

"Mythran" <kip_potter@hot mail.comschreef in bericht
news:%23wqWGUxP HHA.3344@TK2MSF TNGP02.phx.gbl. ..

>
>
"Armin Zingler" <az.nospam@free net.dewrote in message
news:udhxQ9wPHH A.2312@TK2MSFTN GP04.phx.gbl...

>"Mythran" <kip_potter@hot mail.comschrieb

>You're right with VB 2005, but as Item is a structure (it doesn't
>have to
>be), it's more complicated if you use it with the generic List.
>You can
>not
>simply write
>>
> items(0).v1 = ...
> items(0).v2 = ...
>>
>you would have to write
>>
> dim i as item
>>
> i.v1=..
> i.v2=..
>>
> items(0) = i
>>
>>>
>>In which case you can just add a constructor to the structure that
>>took 2
>>parameters, the names of the properties to set. Then you could just
>>use:
>>>
>>items(0) = New Item(someDate, someDecimal)
>>>
>>:)

>>
>>
>Right, but my example doesn't create a new item.
>>
>>
>Armin

>
Umm, yeah it did :0
>
Dim i As Item
>
is the same as
>
Dim i As Item = New Item()
>
where Item is a structure....
>
:)
>
Mythran
>
>

[Armin Zingler]

Re: Creating an array

"Cor Ligthert [MVP]" <notmyfirstname @planet.nlschri eb

Mythran,
>
You know Armin from the past. This will probably a long thread.

Heeey, I didn't know I'm mainly responsible for long threads. ;-) I'm only
(still) not able to say what I want to say briefly. ;-(



Armin

[Cor Ligthert [MVP]]

Re: Creating an array

Armin,

After sending this, I got the idea that you would read it as you did. I
wanted to say that you mostly investigate very good what you are writing
(after a quick start).

:-)

Cor

"Armin Zingler" <az.nospam@free net.deschreef in bericht
news:%23XvUsGyP HHA.4424@TK2MSF TNGP06.phx.gbl. ..

"Cor Ligthert [MVP]" <notmyfirstname @planet.nlschri eb

>Mythran,
>>
>You know Armin from the past. This will probably a long thread.

>
Heeey, I didn't know I'm mainly responsible for long threads. ;-) I'm only
(still) not able to say what I want to say briefly. ;-(
>
>
>
Armin