Library tutorials & articles
Arrays
- Introduction
- Declaring Arrays
- Reading/Writing to Arrays
- Getting the size of the array
- Dynamic Arrays
- Multidimensional Arrays
Getting the size of the array
Sometimes, you will need to find the upper and lower limits of an array. To do this you can use the LBound and UBound functions. This is especially useful if you have used the ReDim statment (see dynamic arrays). To find the upper bound of an array (ie the ... To number part) use the UBound Function, using the following syntax:
UBound(ArrayName, Dimension)
ArrayName is the name of your array. Dimension is an optional integer representing the dimension number for use when using multidimensional arrays (discussed later in this tutorial). To find the lower bound of an array (ie the number To ... part of the array) use the LBound function, using the following syntax:
LBound(ArrayName, Dimension)
ArrayName is the name of your array. Dimension is an optional integer representing the dimension for use when using multiple dimensional arrays. The following code fills a list box with the values of all the items in gArray.
' Get the lower and upper values of
gArray
LowerVal = LBound(gArray)
UpperVal = UBound(gArray)
For i = LowerVal To UpperVal
' Add a new item to the list, containing the
' next item in the array
List1.AddItem gArray(i)
Next
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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
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