What Will I Learn?
How to Work with More than One Dimension in VBScript Programming using Emacs
Requirements
GNU Emacs
Github: https://github.com/emacs-mirror/emacs
Download link: https://www.gnu.org/software/emacs/download.html
Difficulty
Intermediate
Tutorial Contents
- How to Create A Simple VBScript Array
- A Two Dimensional Array
- A Three Dimensional Array
- Nth Dimensional Arrays
VBScript multidimensional arrays enable a programmer to store data in complex matrices. By using multidimensional array a programmer can create a matrix of data rather than a list.
However, before diving into the rather more complex world of VBScript multidimensional arrays it is probably best to consider a simple array first.
How to Create A Simple VBScript Array
Simple VBScript array:
Option Explicit
Dim Names: Names = Array ("Fred", "John", "Joan")
Dim x: For x = 0 to (ubound(Names))
wscript.echo Names(x)
Next
A Two Dimensional Array
If a simple VBScript array is analogous to a list then a two dimensional array is analogous to a grid of data (and is often referred to as a rectangular array). Here a 5 by 8 grid is defined:
Dim WorkingWeek (4, 7)
WorkingWeek (0,0) = "Start working on Monday"
WorkingWeek (0,3) = "Remember to have lunch"
WorkingWeek (4,7) = "Stop working on Friday"
It's always worth remembering that an array starts with index number 0 and not 1. Bearing that in mind the contents of the array can now be accessed:
Dim x, y
For y = 0 to ubound (WorkingWeek)
For x = 0 to ubound (WorkingWeek, 2)
If WorkingWeek (y,x) <> "" Then
wscript.echo WorkingWeek (y,x)
End If
Next
Next
It's worth noting the fact that the dimension number is used here with ubound in order to obtain the number of elements in the additional dimension.
A Three Dimensional Array
If a one dimensional array is analogous to a list, and a two dimensional array is analogous to a grid, then a three dimensional array is analogous to a cube (for example a Rubik's cube). The array elements are assigned in the same ways as with two dimensions (except, of course that there is an extra dimension):
Dim cube (3, 3, 3)
cube (0,0,0) = "Top Left Front"
cube (1,1,1) = "Center"
cube (2,2,2) = "Bottom Right Back"
And the 3 dimensional array can be used in a similar manner to 2 dimensions:
Dim x, y, z
For y = 0 to ubound (cube)
For x = 0 to ubound (cube, 2)
For z = 0 to ubound (cube, 3)
If cube (y,x,z) <> "" Then
wscript.echo y, x, z, cube (y,x,z)
End If
Next
Next
Next
Nth Dimensional Arrays
It is possible to have a maximum of 32 dimensions in a VBScript multidimensional array, but more than that will cause VBScript to run out of memory. However, since that's more than enough dimensions for a Quantum physicist then it's probably enough for the average VBScript programmer.
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