Get the level of a hierarchy

Question

I have an array of objects, Where each object has an id and a ParentId property (so they can be arranged in trees). They are in no particular order

Answer 1

I'm not sure where you get the value for level so I'll assume that its just an integer. BTW, you can add the level property to each of your array's item by looping through it.

for (var i = 0, l = data.length; i < l; i++) { 
    data[i].level = i
}

which will give

data = [{id:"1", parentId:"3", level:0 }, {id:"2", parentId:"1", level:1 } ...]