var ids = dataarrmapitem = return itemvalue join var parentIds = new Setdataarrmapitem = if itemparent != 0

var ids = data.arr.map((item) => { return item.value }).join(',');

var parentIds = [...new Set(data.arr.map((item) => { if (item.parent != 0) { return item.parent } }))].join(',');

var combinedString = ids + parentIds;