I a trying to make a hole into this box, iv done like this:

difference () {
color ("black", 1)
cube ([233,533,451]);
translate ([5,5,5]) cube ([243,523,441]);
translate ([56.5,95,440]) cylinder_array(21,5,25) cylinder(r=2, h=15);
}

module cylinder_array( count, distance, rows )
    for (i = [0 : count - 1], h = [0 : rows-1])
        translate([distance * h, distance * i, 0])
            children();

This works, but i want less code by include a file by doing this:

difference () {
color ("black", 1)
cube ([233,533,451]);
translate ([5,5,5]) cube ([243,523,441]);
translate ([56.5,95,440]) include <pin.scad>;
}

This aint working why?
Does this means you cannot difference a include file?

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The suggested way of doing this would be to define the parts as
module in the other file and load it via use<>.

Example:

--- file: part.scad

module part() {
cube(10);
}

--- file: main.scad

use <part.scad>

module array( count, distance, rows )
for (i = [0 : count - 1], h = [0 : rows-1])
translate([distance * h, distance * i, 0])
children();

array(10, 20, 2) part();

ciao,
Torsten.

Thank you all, yea i made module in that include and just simple difference
that cylinder.
It works.

Awsome guys.
Im sure to be back with another post later on, iv learned a lot already.

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