Feed Values into Array

[ukgimp]

New to ASP (again :)), usually dabble in php. So arrays are confusing me a little.

I have a couple of questions.

Do I have to set the number of values in the array when I dim the thing?:

Dim myArray(10)

or is there a way just to read the values into the array, like in php where you simply run through the values

myArray[] = "string value";

Any good resources covering this sort of thing.

Cheers

[john_k]

You need to specify the number of elements. You can do that with the original Dim, or you can do it with a ReDim command.

If you are getting values from a recordset, you can populate the array with the .GetRows method. That will return a properly dimensioned array.

[john_k]

Oops - there is one other way, and that is with the Split command. So if you are processing a delimitted list, then that works well.

[ukgimp]

Thanks John. Just seems lame that I have to know the number of items before I declare it. These wont be CSV array values or from a DB.

Cheers

[john_k]

You don't need to know the number when you declare it with the Dim. Just with the ReDim.

Dim vArray 
Dim lArrayLen 
Dim lIdx 
' detemine number of elements 
lArrayLen = DoSomeCalculation() 
' Redim and then loop 
ReDim vArray(lArrayLen - 1) 
For lIdx = 0 To (lArrayLen - 1) 
 ' do stuff to populate array 
Next 

Another option is the Dictionary object. This allows you to add values or objects without specifying any size.

[streetshirts]

You can also define an array like this (usuful if you have a fixed number of items):

Dim myArray
myArray = Array(variable1, "string1", variable2)