Library tutorials & articles
Arrays
- Introduction
- Declaring Arrays
- Reading/Writing to Arrays
- Getting the size of the array
- Dynamic Arrays
- Multidimensional Arrays
Reading/Writing to Arrays
You can fill elements of an array very easily. You can use the following syntax:
ArrayName(Element) = Value
Where element is a valid element. The following code declares gArray and fills elements 1,2 and 3 with names.
Dim sArray(1 To 10) As String
sArray(1) = "Paul"
sArray(2) = "Fred"
sArray(3) = "Colin"
Likewise, you can access the value in the array in the same way. The following code displays a message box containing the 3rd value in sArray:
Msgbox sArray(3)
As I said at the start of this tutorial, this can be very beneficial as you can access different values in the array using code. For example, if you hard coded 3 variables:
Dim sName1 As String
Dim sName2 As String
Dim sName3 As String
you would be limited to 3 names, and if you wanted to access them, you would have to write different code for accessing each variable, as you can't type
Msgbox (sName & lNum)
to access sName1, if lNum is 1. With Arrays, you can:
Msgbox sNames(lNum)
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I'm a bit confuse. I would like user to insert how many data they want to put in the array.
When I declare the array like this
Dim subjArr( ) As DataType
How should I write the code so array size is according to user input. This is the code for user to insert how many records should be inserted.
Dim SubArr() As DataType
Dim subjNo As String
subjNo = InputBox("Enter the no of subjects to calculate: ")
MsgBox (subjNo + " subjects will be calculated")
Thanks James
This is a good Array Tutorial for VB Newbies like me.
http://www.4guysfromrolla.com/webtech/110800-1.shtml
I really just added this in case anyone comes across this in a search as I did
+++++++++++++++
check it: FLEETING IMAGE
No, I believe he means something like this:
Say you had a string array with 6 elements, beginning with zero.
The values were arranged like this:
strArray(0) = "Step 1"
strArray(1) = "Step 2"
strArray(2) = "Step 3"
strArray(3) = "Step 4"
strArray(4) = "Step 5"
strArray(5) = "Step 6"
He wants to randomly arrange the elements' contents, like this:
strArray(0) = "Step 4"
strArray(1) = "Step 3"
strArray(2) = "Step 5"
strArray(3) = "Step 1"
strArray(4) = "Step 6"
strArray(5) = "Step 2"
I hope this is correct, and/or clear.
Are you speaking of randomly pulling one of the values as in say a random name generator?
Can anyone tell me if it's possible to randomly sort the elements in an array?
I'm not familiar to 3d arrays, but could you use something similar to:
I use that to copy 1d arrays.
Not the best piece of code but meh.
Public Sub MoveArray()
For Z = 0 To 10
Array2(Z) = Array1(Z)
Next Z
End Sub
I am dealing with some very large (3 dimensional) arrays and the above kind of operation seems a little slow for the user to sit around waiting for. (Especially when it will need to be used in the Undo Function)
Any suggestions will be gratefully received.
couling@fsnet.co.uk">pcouling@fsnet.co.uk
This thread is for discussions of Arrays.