Tech Tip: Use a pointer to pass an array as parameter

PRODUCT: 4D | VERSION: 13.1 | PLATFORM: Mac & Win

Published On: September 12, 2012

4D does not allow Arrays to be used as parameters to methods. It does allow pointers; thus a pointer to an array is an acceptable substitute.

For example this method, named increment, takes a pointer to an array as a parameter.

C_POINTER($1;$arr)
$arr:=$1

For ($i;1;Size of array($arr->))
$arr->{$i}:=$arr->{$i}+1
End for

increment(->$test)

To call this method simply pass a pointer to an array.