nested

I am trying to understand how this datatype (Square) represents square matrices. type Square = Square' Nil data Square' t a = Zero (t (t a) ) | Succ (Square' (Cons t) a) data Nil a = Nil data Cons t a = Cons a (t a) So. What is t here? I suppose it is one of the types declared above. I decided to start with the simplest, so Zero (Nil (Nil Int)) If I put integer 4 as a value, is this a matrix (4) ? Suppose it is something. Now, what is this: Succ ( Zero (Cons t) a) if I am right about t , then this, perhaps, must represent some 2×2 matrix, but what are its values? Succ (Zero (Cons Nil) a) I

In the following code, can the x member be accessed from the nested object literal? var outer = { x : 0, inner: { a : x + 1, // 'x' is undefined. b : outer.x + 1, // 'outer' is undefined. c : this.x + 1 // This doesn't produce an error, } // but outer.inner.c is NaN. } In the way you put it - no. You need two stages construction, this will work: var outer = { x : 0 }; // outer is constructed at this point. outer.inner = { b : outer.x + 1 // 'outer' is defined here. }; Not in the construct you have there, no. The main reason being that outer doesn't actually exist yet when you are inside inner

I have a list of lists , containing data.frames, from which I want to select only a few rows . I can achieve it in a for-loop, where I create a sequence based on the amount of rows and select only row indices according to that sequence. But if I have deeper nested lists it doesn't work anymore. I am also sure, that there is a better way of doing that without a loop. What would be an efficient and generic approach to sample from nested lists, that vary in their dimensions and contain data.frames or matrices? ## Dummy Data n1=100;n2=300;n3=100 crdOrig <- list( list(data.frame(x = runif(n1,10,20)

I have a horizontal parent list. Some of the list items display a nested vertical list when clicked. How do I force the items in the vertical sub list to be the same width as the parent list item? See jsFiddle . HTML: <ul class="mainMenu horizontalMenu bulletless fullWidth bold"> <li class="showSubMenu"> <div>Resumes & Cover Letters ▾ </div> <ul class="mainSubMenu bulletless"> <li><a>Resumes</a></li> <li><a>Cover Letters</a></li> <li><a>Interviews</a></li> </ul> </li><li><a>Other Link</a> </li><li><a>Other Link</a></li> </ul>​ CSS: .horizontalMenu li{ display: inline-block; } .mainMenu > li{

Lets say this is the situation: [Stored Proc 1] BEGIN BEGIN TRANSACTION ... exec sp 2 COMMIT END Now, if SP 2 - rolls back for whatever reason, does SP 1 - commit or rollback or throw exception? Thanks. There are no autonomous transactions in SQL Server. You may see @@TRANCOUNT increase beyond 1, but a rollback affects the whole thing. EDIT asked to point to documentation. Don't know of the topic that documents this explicitly, but I can show it to you in action. USE tempdb; GO Inner proc: CREATE PROCEDURE dbo.sp2 @trip BIT AS BEGIN SET NOCOUNT ON; BEGIN TRANSACTION; PRINT @@TRANCOUNT; IF