Hi, I have a form and I need to check if a input belongs to enum(0,1,2,3,..,n) Is there a simple way to check if my variable belongs to the set [0:n] ? Or do I have to write each condition (basically n<10, so it's feasible but not that practicle...)? If there ain't native function to do that, could you give me a hint on how to make a f...
hello, i want to set a main page or an index page for my app. i tried adding MAIN_PAGE in settings.py and then creating a main_page view returning a main_page object, but it doesn't work Also, i tries to add in the urls.py a declaration like (r'^$', index), where indexshould be the name of the index.html file on the root (but it obvio...
Hello, suppose I have a type defined as type value = None | Int of int | Float of float | Complex of Complex.t | String of string | Char of char | Bool of bool and I want to be able to work with Sets of these values. From what I understood I have to use the functor to concretize the Set module with a conc...
I'm using gcc 4.3.3 to try to compile the following code: struct testStruct { int x; int y; bool operator<(testStruct &other) { return x < other.x; } testStruct(int x_, int y_) { x = x_; y = y_; } }; int main() { multiset<testStruct> setti; setti.insert(testStruct(10,10)); return 0; } I get this error...
What is the most elegant way to grab unique random numbers I ponder? At the moment I need random unique numbers, I check to see if it's not unique by using a while loop to see if I've used the random number before. So It looks like: int n = getRandomNumber % [Array Size]; for each ( Previously used n in list) Check if I've used n...
Possible Duplicates: Properties vs Methods C#: Public Fields versus Automatic Properties What is the real purpose of get,set properties in c#? Any good ex when should i use get,set properties... ...
I want to setImageResource for an ImageButton programatically, based on a variable. For eg: if size=5, I want to setImageResource to R.drawable.five if size=6, I want to setImageResource to R.drawable.six Unfortunately, I have too many of these, so an if-else or switch gets tiring. Is there a way to achieve something like: R.dr...
hi im facing the challange of optimizing a database design by an automated mechanism. the database will include tables which relates arbitrary data to an attribute e.g. Table A contains all id's of persons who clicked the buy button, Table B contains all id's who have no chargeback, .... so given are some very basic MainTables e.g. A,B...
I am given a string, and a set of rules which select valid substrings by a process which isn't important here. Given an enumeration of all valid substrings, I have to find the optimum set of substrings according to a set of ranked criteria, such as: Substrings may not overlap All characters must be part of a substring if possible Use a...
Whats the difference now between doing this: public string Title { get; set; } and this: public string Title; Back in the day people always said use accessor methods with private variables called by the public accessor, now that .net has made get; set; statements so simplified that they look almost the same without the private vari...
I have two arrays, say A and B with |A|=8 and |B|=4. I want to calculate the set difference A-B. How do I proceed? Please note that there are no repeated elements in either of the sets. Edit: Thank you so much everybody for a myriad of elegant solutions. Since I am in prototyping stage of my project, for now I implemented the simplest s...
What's the data structure in Java that has the fastest operation for contains() ? e.g. i have a set of numbers { 1, 7, 12, 14, 20... } Given another arbitrary number x, what's the fastest way (on average) to generate the boolean value of whether x is contained in the set or not? The probability for !contains() is about 5x higher. Do a...
I need to iterate both forwards and backwards in a sorted set. If I use NavigableSet, I get a strictly-forward iterator and a strictly-backward iterator (iterator() and descendingIterator()) but none that can move forward and backward. What's the time complexity of NavigableSet.lower() and higher() ? I can use those instead, but am relu...
I have set an attribute set in my Magento shop which has several binary attributes. For a pulldown I need a list of ALL the attributes inside this one attribute set, including their internal name and their label. Since this pulldown should appear in places that not necessarily have a product selected I can't go the usual route of "getti...
I'd like to have a Private or Protected "Setter" for a property that also happens to be an abstract (MustOverride). I'm porting some code from C# to VB and in C# this is pretty straight forward. In VB not so much (for me anyway). Some code... In C#... public abstract class BaseClassWithAnAbstractProperty { public abstract int AnAb...
This is a follow-up on a previous question I had ( http://stackoverflow.com/questions/3313301/complexity-of-stl-max-element ). I want to basically pop the max element from a set, but I am running into problems. Here is roughly my code: set<Object> objectSet; Object pop_max_element() { Object obj = *objectSet.rbegin(); set<Obj...
Hello, I am trying to optimize a piece of code which compares elements of list. Eg. public void compare(Set<Record> firstSet, Set<Record> secondSet){ for(Record firstRecord : firstSet){ for(Record secondRecord : secondSet){ // comparing logic } } } Please take into account that the number of recor...
I have a std::set and I need to erase similar adjacet elements: DnaSet::const_iterator next = dna_list.begin(); DnaSet::const_iterator actual = next; ++next; while(next != dna_list.end()) // cycle over pairs, dna_list is the set { if (similar(*actual, *next)) { Dna dna_temp(*actual); // copy constructor dna_lis...
Hello, I have created one windows application in .net 2.0 and it uses SQL database in back end. I want to create a setup file for this application so that I can install it and run it on any machine which does not have either .NET framework or SQL Server. Please give me some useful link for this. ...
Hi, I want to search in a Set without iterating manually over the elments but there does not seem to be a method to do Collections.search(myset, target, new ComparatorThing()). Am I not seeing something? Thanks. Edit: I am searching for another field than the natural order of the elements. As a manual workaround I used the following...