stack

I'm developing an android app, and I need to have a json response of the show view about a saved object. Trying that, I receive: "SystemStackError (stack level too deep)" app/controllers/segnalaziones_controller.rb:74:in `create' app/controllers/segnalaziones_controller.rb:58:in `create' Here is the "Segnalazione" controller include Gft class SegnalazionesController < ApplicationController load_and_authorize_resource respond_to :json # GET /segnalaziones # GET /segnalaziones.xml # before_filter :authorize def index @segnalaziones = Segnalazione.order(:dataspedizione) respond_to do |format|

I was reading up on the two different ways of implementing a stack: linked list and dynamic arrays. The main advantage of a linked list over a dynamic array was that the linked list did not have to be resized while a dynamic array had to be resized if too many elements were inserted hence wasting alot of time and memory. That got me wondering if this is true for C++ (as there is a vector class which automatically resizes whenever new elements are inserted)? It's difficult to compare the two, because the patterns of their memory usage are quite different. Vector resizing A vector resizes itself

Quick background I'm a Java developer who's been playing around with C++ in my free/bored time. Preface In C++, you often see pop taking an argument by reference: void pop(Item& removed); I understand that it is nice to "fill in" the parameter with what you removed. That totally makes sense to me. This way, the person who asked to remove the top item can have a look at what was removed. However, if I were to do this in Java, I'd do something like this: Item pop() throws StackException; This way, after the pop we return either: NULL as a result, an Item, or an exception would be thrown. My C++

I have created a Lua table in C , but I'm not sure how to push that table onto the top of a stack so I can pass it to a Lua function. Does anyone know how to do this? This is my current code: lua_createtable(state, libraries.size(), 0); int table_index = lua_gettop(state); for (int i = 0; i < libraries.size(); i++) { lua_pushstring(state, libraries[i].c_str()); lua_rawseti(state, table_index, i + 1); } lua_settable(state, -3); [ Push other things ] [ Call function ] Here's a quick helper function to push strings to the table void l_pushtablestring(lua_State* L , char* key , char* value) { lua

I have a function: void func(int a) { int x = a+2; } In the assembly code, in function prolog: push %ebp mov %esp, %ebp sub $0x10, %esp The code only needs to reserve space for x i.e. 4 bytes. But it is reserving 16 bytes. Why is that ? I have always seen it to reserve more space than required. My guess: it tends to store in 16 bytes. i.e. if I needed say 20 bytes, it will reserve 32 bytes, no matter what. This highly depends on your architecture and compiler flags, so it is impossible to point to a single thing and say "this must be it" here. However, I can give you some pointers you may find

This question has been asked before, but the answered ones I could find were from 2009 and don't suit my problem. Let me reiterate the issue. I have a UINavigationController that spawns and pushes lots of different UIViewController s onto its stack. One of those deals with some Core Data operations that need to be saved when that one particular VC get's popped off the stack. Don't focus on the Core Data part, it's about the popping. How can I hook into the moment that the UIViewController is going to be popped off the stack? I was hoping for a delegate method of some sort, but couldn't find it