ListXxorY
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Function: list ListXnotY(list lx, list ly);
Returns a new list, composed of elements that were in either original script, but not both.
Note: This is not the same as getting rid duplicates by preserving just one of each duplicated item. It goes further, and removes both items.
See also: Lists
<lsl>
list ListXxorY(list lx, list ly) { // return elements that are in X or Y but not both
return ListXnotY( lx, ly) + ListXnotY( ly, lx);
} </lsl>
Example:
<lsl> list l1 = ["a","b","c","d"]; list l2 = ["a","1","b","2","c","3"];
list ListXxorY(list lx, list ly) { // return elements that are in X or Y but not both
return ListXnotY( lx, ly) + ListXnotY( ly, lx);
}
list ListXnotY(list lx, list ly) {// return elements in X list that are not in Y list
list lz = []; integer i = 0; integer n = llGetListLength(lx); for (; i < n; i++) if (llListFindList(ly,llList2List(lx,i,i)) == -1) lz += llList2List(lx,i,i); return lz;
}
default{
state_entry() { llSay(0, "Elements that are in x list or y list but not both: " + llList2CSV(ListXxorY(l1,l2))); //will say: d, 1, 2, 3 }
} </lsl>
Posted with the kind permission of Very Keynes, who originated this script June 2007 in the SL scripters forum http://forums-archive.secondlife.com/54/e4/194138/1.html