共用方式為

ACOPY( ) Function

  • 發行項

Copies elements from one array to another array.

ACOPY(SourceArrayName, DestinationArrayName    
[, nFirstSourceElement [, nNumberElements [, nFirstDestElement ]]])

Return Values

Numeric

Parameters

  • SourceArrayName, DestinationArrayName
    Specifies the source array SourceArrayName from which elements are copied one-to-one to the destination array DestinationArrayName. The elements in the source array replace the elements in the destination array.

    The arrays can be one- or two-dimensional. If the destination array doesn't exist, Visual FoxPro automatically creates it. In such a case, the size of the destination array will be the same as that of the source array.

    Note   You can refer to an element in a two-dimensional variable array in two ways: The first uses two subscripts to specify the row and column position of the element in the array; the other uses a single-element number. This function and others that manipulate two-dimensional arrays require single-element numbers (here, nFirstSourceElement and nFirstDestElement). Use AELEMENT( ) to return the proper element number for a two-dimensional array from its row and column subscripts.

  • nFirstSourceElement
    Specifies the first element number in the source array to be copied; inclusive (element number nFirstSourceElement is included in the copying). If nFirstSourceElement isn't included, copying begins with the first element in the source array.

  • nNumberElements
    Specifies the number of elements copied from the source array. If nNumberElements is –1, all elements of the source array beginning with element nFirstSourceElement are copied.

  • nFirstDestElement
    Specifies the first element in the destination array to be replaced.

Remarks

ACOPY( ) returns the number of elements copied to the destination array.

Example

The following example creates an array from selected records in the customer table and then uses ACOPY( ) to create a new array.

CLOSE DATABASES
OPEN DATABASE (HOME(2) + 'data\testdata')
USE customer     && Open customer table

SELECT DISTINCT company ;
   FROM customer ;
   ORDER BY company ;
   WHERE country = 'Germany';
   INTO ARRAY gaCompanies
= ACOPY(gaCompanies, gaCompaniesTemp)  && Make a copy of the array
CLEAR 
DISPLAY MEMORY LIKE gaCompaniesTemp

See Also

ADEL( ) Function | AELEMENT( ) Function | AINS( ) | ASCAN( ) Function | ASORT( ) Function | DIMENSION Command