What's the best way to avoid (or control) the initialisation by the designer of a heavy custom property in .NET? Sometimes it is important to have a property set to something initially without that setting being acted upon when initially set. In the imaginary example below, I want to achieve the flexibility of having something like Upda...
I can create an array initialized with elements like this: int a[] = {10, 20, 30}; How do I create an STL vector and initialize it like the above? What is the best way to do so with the minimum typing effort? The best I can do is: std::vector<int> ints; ints.push_back(10); ints.push_back(20); ints.push_back(30); Though I could sh...
Hey everyone, this is an EXTREMELY beginner question, and I'm somewhat ashamed I don't know it already: How can I execute code just once at the implementation of my object? I have an object that's of a subclass of UIView I want some code to be executed as soon as everything kicks off, but I'm only able to get code to be executed in resp...
Hi guys, I've got a problem running a batch job on my server, whereas it runs fine from Eclipse on my development workstation. I've got my Spring environment set up using Roo, made an entity, and make a batch that does some work, and test it well on my develompent box. I initialize my context and do the work, but when I run my batch on...
I have class Foo class Bar Now, I want Foo* Foo::singleton = new Foo(); Bar* Bar::singleton = new Bar(); to both initialize before int main() is called. Furthermore, I want Foo::singleton to initialize before Bar::singleton Is there anyway I can ensure that? Thanks! ...
I have made a structure for ints and pointers etc. as might be used in LISP. A pointer is at least 8-byte aligned so tag=0. An integer is 29 bits and has a tag of 1. Other types have different tag values. struct Atom{ union{ Pair *pair; struct{ unsigned tag :3; union{ int ...
Possible Duplicates: C++: Easiest way to initialize an STL vector with hardcoded elements Using STL Allocator with STL Vectors out of curiosity i want to know quick ways of initializing vectors i only know this double inputar[]={1,0,0,0}; vector<double> input(inputar,inputar+4); ...
Is there a way for class library to detect when it's loaded, in order to perform some initialization? I've tried adding Program.cs with static Main method, which didn't help. I tried setting Startup object in project properties, but only (None) is available. I know Win32 libraries have entry points, do .NET class libraries have them? ...
I have problem with the syntax needed to initialize a static member in a class template. Here is the code (I tried to reduce it as much as I could): template <typename T> struct A { template <typename T1> struct B { static T1 b; }; B<T> b; typedef B<T> BT; T val() { return b.b; } }; template <typename T> T A<T>::BT::...
I thought that constructors control initialization and operator= functions control assignment in C++. So why does this code work? #include <iostream> #include <cmath> using namespace std; class Deg { public: Deg() {} Deg(int a) : d(a) {} void operator()(double a) { cout << pow(a,d...
Suppose I have a C function: void myFunction(..., int nObs){ int myVec[nObs] ; ... } Is myVec being dynamically allocated? nObs is not constant whenever myFunction is called. I ask because I am currently programming with this habit, and a friend was having errors with his program where the culprit is he didn't dynamically al...
class A { }; template <typename A, int S> class B { public: static int a[S]; B() { a[0] = 0; } }; template<> int B<A, 1>::a[1]; int main() { B<A, 1> t; t; } It compiles under GCC 4.1, but does not link: static.cpp:(.text._ZN1BI1ALi1EEC1Ev[B<A, 1>::B()]+0x5): undefined...
I am not getting usage scenarios or design goals of python __init__.py in my projects. Assume that I have 'model' directory (refers as a package) which I have kept the following files. 1. __init__.py 2. meta.py 3. solrmodel.py 4. mongomodel.py 5. samodel.py I found two ways of using __init__.py. I have common definition which n...
int a = 1, b; if(a > 0) b = 1; if(a <= 0) b = 2; System.out.println(b); If I run this, I receive: Exception in thread "main" java.lang.Error: Unresolved compilation problem: The local variable b may not have been initialized at Broom.main(Broom.java:9) I know that the local variables are not initialized and is your duty to do t...
Hi, Several times a day I run into a problem where I need to dynamically initialize variables in a multidimensional array to prevent PHP throwing a notice because of an uninitialized variable. Code fragments like this are very common: if(!isset($profile[$year][$month][$weekday][$hour])) { $profile[$year][$month][$weekday][$hour] =...
I am new to Servlets. I want to use a method which is called only once after deploying to server. I looked at HttpServlet#init(). But I figured out it is called with each request. Did I misunderstand it? What are the alternatives to init()? ...
I have this code public static Boolean freq[] = new Boolean[Global.iParameter[2]]; freq[Global.iParameter[2]] = false; could someone tell me what exactly i'm doing wrong here and how would i correct it? I just need to initialize all the array elements to Boolean false. thank you ...
I want to populate two foreign key fields in one of my forms. The relevant bit of code is as below: if request.method == 'POST': form = IssuesForm(request.POST or None) if request.method == 'POST' and form.is_valid(): form.save() else: form = IssuesForm(initial={'vehicle': stock_number, 'addedBy': request.user, }) ...
Sorry for the length of this question, but I thought it best to show as much detail to fend of questions asking if I had done A when I had already done A... ;-) I've had a look at the "micro-SD card initialization using SPI interface" thread and didn't see any answers that matched my issue (i.e. things I haven't already tried). I have a...
var id = $(this).children().html(); // id is 5 $.ajax({ url: 'ajax.php?id=' + id, success: function(data) { id = data; // id is 1 } }); if(id == 1){ // id is again 5 ... } Why in the following example I can't reinitialize the id variable? What is wrong? Thanks. ...