@Fergus - I have a problem with the following GAME code:
set royal array; // empty array
do while < #i count #myroyal:
set type elem #i #myroyal; // next royal type
set cnt elem #type piececount; // count them
if #cnt:
set nr + #nr #cnt;
push royal #type;
endif;
inc i;
loop;
The purpose was to make (from the array 'myroyal' of royal types) an array 'royal' of royals that are actually present on the board. The problem is that 'cnt' doesn't get the value zero when the key '#type' is not in the array. So the "if #cnt:" is always satisfied, and the non-present royalas get listed in the array 'royal' as well.
How could this be solved?
[Edit] I did find a solution: use "if + 0 #cnt:" instead of "if #cnt:". Apparently dereferencing a variable with value 'undefined' produces a text string, but using it as an arithmetic operand treats it as 0.
@Daniel - It appears this solves the problem in the preset, which was caused by the first piece type mentioned in the 'royal' array being a Pr, which was not present in the initial setup.
@Fergus - I have a problem with the following GAME code:
set royal array; // empty array do while < #i count #myroyal: set type elem #i #myroyal; // next royal type set cnt elem #type piececount; // count them if #cnt: set nr + #nr #cnt; push royal #type; endif; inc i; loop;The purpose was to make (from the array 'myroyal' of royal types) an array 'royal' of royals that are actually present on the board. The problem is that 'cnt' doesn't get the value zero when the key '#type' is not in the array. So the "if #cnt:" is always satisfied, and the non-present royalas get listed in the array 'royal' as well.
How could this be solved?
[Edit] I did find a solution: use "if + 0 #cnt:" instead of "if #cnt:". Apparently dereferencing a variable with value 'undefined' produces a text string, but using it as an arithmetic operand treats it as 0.
@Daniel - It appears this solves the problem in the preset, which was caused by the first piece type mentioned in the 'royal' array being a Pr, which was not present in the initial setup.