hierarchy

I would like to access the object provided only it's string path in form of array is known. 1.) there is an object, where root["obj1"]["obj2"] = 1; (in common case root["obj1"]...["objN"] ) 2.) I have ONLY string objectPath known: var objectPath = 'root["obj1"]["obj2"]' 3.) I need NOT only READ the object, but SET it's value, like objectPath = 2; //so root["obj1"]["obj2"] === 2 As I understand there might be some options with eval(), but it gets the value, not the variable; one can loop through all objects of root, make convertion to "root.obj1.obj2" (which is not the case, as "obj1" can

Say I have a table of items representing a tree-like structured data, and I would like to continuously tracing upward until I get to the top node, marked by a parent_id of NULL. What would my MS SQL CTE (common table expression) look like? For example, if I were to get the path to get to the top from Bender , it would look like Comedy Futurama Bender Thanks, and here's the sample data: DECLARE @t Table(id int, description varchar(50), parent_id int) INSERT INTO @T SELECT 1, 'Comedy', null UNION SELECT 2, 'Futurama', 1 UNION SELECT 3, 'Dr. Zoidberg', 2 UNION SELECT 4, 'Bender', 2 UNION SELECT 5

I want to build a hierarchy from a one-dimensional array and can (almost) do so with a more or less hardcoded code. How can I make the code dynamic? Perhaps with while(isset($array[$key])) { ... } ? Or, with an extra function? Like this: $out = my_extra_traverse_function($array,$key); function array_traverse($array,$key=NULL) { $out = (string) $key; $out = $array[$key] . "/" . $out; $key = $array[$key]; $out = $array[$key] ? $array[$key] . "/" . $out : ""; $key = $array[$key]; $out = $array[$key] ? $array[$key] . "/" . $out : ""; $key = $array[$key]; $out = $array[$key] ? $array[$key] . "/" .

I have an object hierarchy (MasterNode -> ChildNodes) where master and child nodes are of the same type, and there are only two levels (top level and children) like this ('A' is parent of D,E and F, 'B' is parent of G, etc) A--+ | D | E | F | B--+ | G | C--+ H I Suppose I have a MasterNodes as an IEnumerable of the parent objects (A,B,C) and given a parent object X I can get an IEnumerable of its children by X.children I know that I can enumerate all of the leaf (child nodes) with the SelectMany method or by using from parent in Masternodes from child in parent.children select child This will

Warning: Attempt to present on whose view is not in the window hierarchy! Yes I have looked at the other questions and answers before posting this question. They have not helped me resolve this. Here's what I am doing. I am calling on my singleton class socialHelper to display an action sheet, where postToFacebook method is an option to select. When clicking on this action, I get the Warning above and the postToFacebook is not displayed. I'm calling this from a UIViewController with the UINavigationController as the main controller, and my SocialHelper class is a NSOject . - (void