Array created by .push in a loop is the correct length but only pushing the last element on repeat

Question

I am referencing a global variable and parsing through it to push items onto a stack and then I return that stack to be used elsewhere. The returned array is the correct len

Answer 1

With obj declared at the beginning of the function, there's only a single object in existence. Each iteration of the loop you change that one object's properties. What you want to do is create a new {} object each iteration of the inner loop.

for(var param1 in json){
    for(var param2 in json[param1]){
        for(var param3 in json[param1][param2]){
            var obj = {};
            obj.item1 = json[param1][param2][param3][param4];
            obj.item2 = json[param1][param2][param3][param5];
            obj.item3 = json[param1][param2][param3][param6];
            stack.push(obj);
        }
    }
}