nested

I have a large nested dictionary with an unknown depth and i would like to know how i can find the keys which led to the value. For example... {'furniture':{'chair':{'sofa':{'cushion':{}}}}} Ideally what i am looking for is a function to determine the path to the value that i have entered. I have tried researching online and this is what i tried... def route(d,key): if key in d: return d[key] for k,v in d.items(): if isinstance(v,dict): item = route(v, key) if item is not None: return item This returns the items inside the key. I am looking to be able to extract the path which leads to that

I am trying to dynamically build a matrix of the same type of items in my QML application and keep it dynamic, so that you can change the number of rows and columns in a c++ file anytime. This has been working well, but now, to access them individually, I want to give them dynamic names. Therefore I nested two repeaters and tried to set the objectName as in the following: Repeater{ id: rows model: Matrix1.row //number of rows in Matrix1-Object Repeater{ id: columns model: Matrix1.column //number of columns in Matrix1-Object RepeatedItem{ objectName: (index) +"."+ (rows.index) //matrix elements

Why doesn't that work in java, but this does Map<String, Map<String, Boolean>> myMap = new HashMap<String,Map<String,Boolean>>(); Just to clarify the below alteration of the nested HashMap shows a compiler error, whereas the above does not not; with a Map (not hashmap) Map<String, Map<String, Boolean>> myMap = new HashMap<String,HashMap<String,Boolean>>(); This is because generics in Java are invariant , i.e. even if class B is an A, a Collection<B> is not a Collection<A> . And this is for a good reason. If your example were legal, this would be possible: Map<String, HashMap<String, Boolean>>

I expect (hope even) that this will be a stupid question, but after wrestling for many hours with this problem I need some insight. My iOS 5.1 app uses nested MOCs, having a PrivateQueueConcurrency child MOC, call it MOC-Child, whose parent is a MainQueueConcurrency MOC, call it MOC-Parent. MOC-Parent backs a table view that displays its entities. MOC-Child is used by a parser, which runs asynchronously on a non-main thread, to create new entities that correspond to XML entity-descriptions parsed from a URL connection, and then push the new entities to the MOC-Parent, via a save on the MOC

This question already has an answer here: Can inner classes access private variables? 5 answers The title already says a lot, but basically what i want to do is the following(Example): I have a class called A, and another class inside a called B, like so: class A { int a; class B { void test() { a = 20; } }; }; As you can see my goal is for class B to have access to class A, as it is a nested class. Not this wont work, because B doesn't have access to A, but how can it get access? Thank You Despite that you declared class B inside of A, classes A and B are still completely independent. The

Can a macro be written in Scheme (with define-syntax , for example) which will take expressions like this: (op a b c d e f g h i j) And yield expressions like this as output? (op (op (op (op (op (op (op (op (op a b) c) d) e) f) g) h) i) j) Of course, for arbitrary lengths. I can't think of a way to do it, given some template like this: (define-syntax op (syntax-rules () [(_) 'base-case] [(v1 v2 ...) 'nested-case??])) (define bop list) (define-syntax op (syntax-rules () ((op a b) (bop a b)) ((op a b c ...) (op (bop a b) c ...)))) For example, (op 1 2 3 4) expands to (bop (bop (bop 1 2) 3) 4)