ReDim lause

Declares or redefines variables or arrays.

SĂŒntaks:

ReDim Statement diagram


ReDim [Preserve] variable [(start To end)] [As type-name][, variable2 [(start To end)] [As type-name][,...]]

Optionally, add the Preserve keyword to preserve the contents of the array that is redimensioned. ReDim can only be used in subroutines.

Parameetrid:

variable: Any variable or array name.

typename: Keyword that declares the data type of a variable.

primitive data types fragment

Byte: Byte variable (0-255)

Boolean: Boolean variable (True, False)

Currency: Currency variable (Currency with 4 Decimal places)

Date: kuupÀevamuutuja

Double: Double-precision floating-point variable (1,79769313486232 x 10E308 - 4,94065645841247 x 10E-324)

Integer: tÀisarvmuutuja (-32768 - 32767)

Long: pikk tÀisarvmuutuja (-2.147.483.648 - 2.147.483.647)

Object: Object variable (Note: this variable can only subsequently be defined with Set!)

Single: ĂŒksiktĂ€psusega ujukomamuutuja (3,402823 x 10E38 - 1,401298 x 10E-45).

String: String variable consisting of a maximum of 2,147,483,647 characters.

Variant: Variant variable type (contains all types, specified by definition). If a type name is not specified, variables are automatically defined as Variant Type, unless a statement from DefBool to DefVar is used.

object: Universal Network object (UNO) object or ClassModule object instance.

char: Special character that declares the data type of a variable.

Type declaration characters fragment

LibreOffice BASICus pole muutujaid vaja selgesĂ”naliselt deklareerida, kĂŒll aga tuleb enne kasutamist deklareerida massiivid. Muutuja deklareerimiseks saab kasutada lauset Dim. Deklaratsioonide eraldamiseks kasuta koma. MuutujatĂŒĂŒbi deklareerimiseks sisesta nime jĂ€rele tĂŒĂŒbideklaratsiooni mĂ€rk vĂ”i kasuta vastavat vĂ”tmesĂ”na.

Declaration character

Variable type name

%

Integer

&

Long

!

Single

#

Double

$

String

@

Currency

array: Array declaration.

array fragment

start, end: Numerical values or constants that define the number of elements (NumberElements=(end-start)+1) and the index range.

start and end can be numerical expressions if ReDim is applied at the procedure level.

LibreOffice Basic toetab ĂŒhe- ja mitmemÔÔtmelisi massiive, mis on mÀÀratletud mÀÀratud muutujatĂŒĂŒbiga. Massiivid on sobivad siis, kui programm sisaldab loendeid vĂ”i tabeleid, mida soovid redigeerida. Massiivide eelis on see, et nende abil saab indeksite abil pöörduda ĂŒksikute elementide poole. Indeksid saab formuleerida arvavaldiste vĂ”i muutujatena.

Arrays are declared with the Dim statement. There are multiple ways to define the index range:


  Dim text(20) As String ' 21 elements numbered from 0 to 20
  Dim value(5 to 25) As Integer ' 21 values numbered from 5 to 25
  Dim amount(-15 to 5) As Currency ' 21 amounts (including 0), numbered from -15 to 5
  REM Two-dimensional data field
  Dim table$(20,2) ' 63 items; from 0 to 20 level 1, from 0 to 20 level 2 and from 0 to 20 level 3.

You can declare an array types as dynamic if a ReDim statement defines the number of dimensions in the subroutine or the function that contains the array. Generally, you can only define an array dimension once, and you cannot modify it. Within a subroutine, you can declare an array with ReDim. You can only define dimensions with numeric expressions. This ensures that the fields are only as large as necessary.

NĂ€ide:


Sub ExampleRedim
    Dim iVar() As Integer, iCount As Byte
    ReDim iVar(5) As Integer
    For iCount = 1 To 5
        iVar(iCount) = iCount
    Next iCount
    ReDim iVar(10) As Integer
    For iCount = 1 To 10
        iVar(iCount) = iCount
    Next iCount
End Sub

Palun toeta meid!