Initialize Two-Dimension Array

Posted on 2002-04-30
Last Modified: 2012-05-04
I'm using VB6 against an SQL Server7 database.
I'm trying to find the best way to clear out or initialize a two dimensional array.

The array is declared as:
Is there an easy way to initialize this array?
Or do I have to do a nested for loop with i,j as indexes?

Thanks in Advance

Question by:jtrapat1
LVL 22

Accepted Solution

rspahitz earned 50 total points
ID: 6981621
You could do it this way:

Dim CodeArray() as string ' create a dynamic array

ReDim CodeArray(750,6) ' sets bounds and loses all data if any previously existed.

LVL 44

Expert Comment

ID: 6981810
what do you want to "initialize" the array to?

What kind of values will you store in CodeArray?


Dim CodeArray(750,6) as Integer

then all entries are AUTOMATICALLY created with the initial value 0.


Dim CodeArray(750,6) as String

then all entries are AUTOMATICALLY created with the initial value "". ( a zero-length string)


Dim CodeArray(750,6) as Variant

then all entries are AUTOMATICALLY created with the initial value Null.

LVL 75

Expert Comment

by:Anthony Perkins
ID: 6981842
Erase CodeArray

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LVL 75

Expert Comment

by:Anthony Perkins
ID: 6981848
Here is an example from MSDN using Erase:

Erase Statement Example
This example uses the Erase statement to reinitialize the elements of fixed-size arrays and deallocate dynamic-array storage space.

' Declare array variables.
Dim NumArray(10) As Integer   ' Integer array.
Dim StrVarArray(10) As String   ' Variable-string array.
Dim StrFixArray(10) As String * 10   ' Fixed-string array.
Dim VarArray(10) As Variant   ' Variant array.
Dim DynamicArray() As Integer   ' Dynamic array.
ReDim DynamicArray(10)   ' Allocate storage space.
Erase NumArray   ' Each element set to 0.
Erase StrVarArray   ' Each element set to zero-length
   ' string ("").  
Erase StrFixArray   ' Each element set to 0.
Erase VarArray   ' Each element set to Empty.
Erase DynamicArray   ' Free memory used by array.


LVL 15

Expert Comment

ID: 6982340
>Or do I have to do a nested for loop with i,j as indexes?

No, to initialize array to some value, you can also do a loop with m,n as indexes.  ;-)

Expert Comment

ID: 6982403
Or I think array can be saved on DBase as one binary field
(Using append  chunk)

if U mean By Initialization filling by values from DB

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