Erasesub

Statement to erase arrays

Syntax

Declare Sub Erase ( array As Any [, ... ] )

Parameters

Name		Description
`array`		An array to be erased.

Description

Using Erase on a fixed-length array resets all elements without freeing the allocated memory.
In case of objects, there is destruction then re-construction.

Using Erase on a variable-length array (array already sized) frees the memory allocated for the array elements, but the array remains declared at its same scope level (with the same datatype and number of dimensions), only the high/low bounds values of each dimension are reset (-1/0).
In case of objects, there is destruction before freeing memory.

Remarks

Usage



Erase( array0 [, array1 ... arrayN ] )

Differences from QB

None

Example

Dim MyArray1(1 To 10) As Integer

ReDim MyArray2(1 To 10) As Integer 



Erase MyArray1, MyArray2

Example showing the before and after results of single-dimension arrays:

Dim MyArray1(1 To 10) As Integer

ReDim MyArray2(1 To 10) As Integer



Print "MyArray1", LBound( MyArray1 ), UBound( MyArray1 ) ' prints: MyArray1       1             10

Print "MyArray2", LBound( MyArray2 ), UBound( MyArray2 ) ' prints: MyArray2       1             10



Erase MyArray1, MyArray2



Print "MyArray1", LBound( MyArray1 ), UBound( MyArray1 ) ' prints: MyArray1       1             10

Print "MyArray2", LBound( MyArray2 ), UBound( MyArray2 ) ' prints: MyArray2       0            -1

Example showing the before and after results of multi-dimension arrays:

Dim MyArray1(1 To 3, 4 To 9) As Integer

ReDim MyArray2(1 To 3, 4 To 9) As Integer



Print , "LOWER", "UPPER"

Print "MyArray1", _

      LBound( MyArray1, 1 ); ", "; LBound( MyArray1, 2 ), _

      UBound( MyArray1, 1 ); ", "; UBound( MyArray1, 2 )

Print "MyArray2", _

      LBound( MyArray2, 1 ); ", "; LBound( MyArray2, 2 ), _

      UBound( MyArray2, 1 ); ", "; UBound( MyArray2, 2 )



Erase MyArray1, MyArray2



Print

Print "MyArray1", _

      LBound( MyArray1, 1 ); ", "; LBound( MyArray1, 2 ), _

      UBound( MyArray1, 1 ); ", "; UBound( MyArray1, 2 )

Print "MyArray2", _

      LBound( MyArray2, 1 ); ", "; LBound( MyArray2, 2 ), _

      UBound( MyArray2, 1 ); ", "; UBound( MyArray2, 2 )

The above example will output:

              LOWER         UPPER
MyArray1       1,  4         3,  9
MyArray2       1,  4         3,  9

MyArray1       1,  4         3,  9
MyArray2       0,  0        -1, -1

Reference

Documented in KeyPgErase.html