now call the function and build your filter object:
var uuids = // your attachments in an array
var filter = { "Operation":"IsEqual", "ApiName":"UUID", Values:[uuids[0]] };
for (var i = 1; i < uuids.length; i++) {
filter = concatFilters(filter,
{ "Operation":"IsEqual", "ApiName":"UUID", Values:[uuids[i]] });
}