Casting is a process where an object type is explicitly converted into another type if the conversion is allowed.

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A cast(type, expr) macro that can be used in C or C++

I had the idea to make some casting macros which could enable "extra checking" for C code, if that code happened to also be compilable as C++. The goal was to make the casts easier to see, as well as ...
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Program to count number of victories in a pool of contests

I changed the program to use a dynamic array instead of a vector or storing the integers. This program works without bugs and executes relatively fast. The only doubt Istill have is how to fill the ...
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Comparing Equals() method from MSDN

I've implemented the Equals() support for my class as follows: ...
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Setting the positions of nodes based on a layout

I have a bit of code that looks like this: ...
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Implicit type class for updating maps

With the help of SO I got my code working, but I think it still could be improved, in particular I do not like using asInstanceOf. Is there some way how to avoid ...
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strncpy To strcpy Equivalence

I have this ugly function, and I feel that the entire strncpy should just be an strcpy: ...
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Treating a short like an uchar[2]

I need to create a commandword to be send to hardware and I'd like to make is as efficient as possible (without going to Assembler or similar). The command is 16Bit long and has to be passed as an ...
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Sorting polymorphic classes

I'm learning from "Jumping into C++" by Alex Allain (sample chapter and TOC) and solved the first problem in Chapter 26 "Inheritance and Polymorphism". I'm especially concerned about my use of ...
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88 views

A less verbose const_cast

Motivation const_cast is a beast that I seldomly encounter. But when I do so it is mostly a bad experience. Nobody knows what most of the C++ programmers do but ...
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177 views

Efficient generic type conversion between numeric types in F#

It's easy to write a function that adds two ints in F#: let add x y = x + y Actually, it's the same as: ...
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Getting a set of subscribers from a subscriberMap

In my Java event bus project, I have a private generic method that retrieves a Set<Subscriber<E>> from a private ...
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457 views

Casting between types for shared_ptr

I'm implementing an Entity-Component-System. Basically, an entity is a wrapper around an ID, a component is just a POD struct, and a System is a class that does work on components corresponding to the ...
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190 views

Here's my interface, so call me …maybe

I'm inspecting VBA code to find obsolete code constructs - namely explicit Call statements, like this: Call DoSomething(42) ...
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Performance of object-to-string conversion

Using an OR/M I map a lot of rows from database to array of objects (~300k). In these objects some properties are marked with special attribute [Signed]. Row-by-row ...
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Two index computations differing in execution time

Code I have the following piece of code ...
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Downcast all elements from a list using static_cast

So I have this code: ...
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Python odd number diamond

I worked up a quick diamond program that takes only odd numbers while returning an error with even numbers or 0. The code looks rather ugly to me, especially with the recurring ...
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1answer
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Implement interface type in implementation of another interface without too much casting

I have a group of tests that must be run in similar (but different) fashion and they have setups, results, etc. which are also similar but different. Great, I thought, I'll use interfaces to define ...
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Cast an object to Decimal? or Int? etc but leave it as null if it is null

In a case like this: object A1 = null; Decimal? B = Convert.ToDecimal(A1); object A2 = null; int? C = Convert.ToInt32(A2); Note that in case where ...
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270 views

Removing asInstance[T] from scala code

I've written this scala code and I cannot work out how/if it is possible to remove the asInstance in the definition of class ...
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1answer
888 views

Cast a raw map to a generic map using a method, cleanly and safely in a fail early manner

Casting, instanceof, and @SuppressWarnings("unchecked") are noisy. It would be nice to stuff them down into a method where they won't need to be looked at. ...
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Changing the type of an object inside a method?

First off, this is not my code. I'm curious what everyone thinks about changing the type of an object inside of a method then modifying the properties of the cast type. I wanted to use composition to ...
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Avoiding code duplication and retaining const correctness

Sometimes I run across the problem of having two member function overloads that only differ in the constness of this (and the return type, but that is less ...
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Avoiding casts in abstract types

I asked this question on Stack Overflow and in the comments someone had this to say. In a proper design, you should almost never have to do a dynamic_cast, even if it's hidden inside some nice ...
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Limited typecasting with regex

I'm learning Python, and found a fun little video on YouTube called "Learn Python through public data hacking". In essence it uses the CTA unofficial API to do some parsing of XML data. In taking ...
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1answer
137 views

Different Constructors, Same Implementation

I have this class containing two constructors with different signatures but they do the same thing: ...
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1answer
370 views

Can casting to fragment be more efficient than using a variable?

I'm new to using fragments in Android. I'm working on an app using a sliding panel layout and I just came up with an idea for changing my fragments. I decided to create the following method: ...
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Converting a region code (short string up to 4 characters) to a 32-bit integer

There is a function that converts region code strings (1 to 4 characters and null terminator) to 32 bit integers codes to be used in maps as keys or values. Blindly casting char* to int* is bad as it ...
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Is this a conforming implementation of duration_cast?

Sadly VS2012's duration_cast is broken, and I actually need the functionality which is broken. So, I wrote my own: ...
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Collection of Actions

I am trying to create a class to queue up a series of commands. (Not really a queue as events happen based on time). Each command has a callback (Action) that get's called. However, each Action has a ...
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NSArray and NSNumber-int conversions

I have a textView which is displaying a string. I also have an array which keeps track of where every line begins, it stores the "start index" or NSRange.location for every line. However, when text ...
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2D model simulating water breaking a floodbank

For a homework assignment we have to write a class that simulates water breaking a floodbank (very simplistic 2D simulation). My implementation works fine but I found that there were many downcasts ...
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452 views

Returning a more specific class

I would appreciate some feedback on my design of a few classes to query the Trakt.tv API. ...
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TryCast<T> method

This isn't urgent, it is more along the lines of trivia or a challenge. The solution works fine as it is, but I suspect it could be better. What follows is a method I came up with a while back in a ...
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Cast inside the method or let the client code cast, which one is better? [closed]

I have two choices of implementing a method, the first one is a generic type where the client code does not have to cast ...
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(sort of) casting types in Ruby: changing class of an instance [closed]

I defined the class Rectangle: ...
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1answer
172 views

CRAIICall class

I thought it was a good idea to use this in my C++ projects: ...
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1answer
118 views

Demonstration of pthread calls

Please review for any unnecessary casting, memory leaks, wrong use of pthread call, or validation problems in the given code. ...
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1answer
104 views

Nice way to using cast on TextView [closed]

Question is short. Assuming that I don't need reference itself, would this cast ((TextView) findViewById(R.id.someTextView)).setText("lala"); be better (or at ...
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1answer
880 views

Loading an Object from File with Type-Safety and Thread-Safe access

I'm attempting to write a bit of code that allows for easy and safe access to objects in a file. It seems to work great but I was curious if there was an easier way to do this or if Java already has ...
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834 views

Computing value sums in a custom grid

I have written a helper method which computes the sum of values in some custom grid, given the column indexes. The method appears to work (for a decimal - as Anthony pointed out, I need to test this ...
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Over-Riding User Input

Here's a trivial example: if type(length) != int: length = 16 as opposed to: ...
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1answer
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Casting const pointer to non-const pointer when using struct iovec

struct iovec is defined in <uio.h> by the following way: ...
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Is this a proper way to check a viewstate of type int?

In page load I'm saving a query string int value in a viewstate. Then I save it to my DB. Here is the code I use to retrieve viewstate value and validating it: ...
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C++ int_cast<> function for checked casts?

In order to detect run-time integer casting problems, I've created this function*: ...
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166 views

A way to do this without a lot of variables and casting?

Currently I have this code: ...
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How can I avoid unchecked cast warning in my generic recursive Iterator?

It's somewhat odd that Java's collection framework has no iterator for recursive data structures. Since I needed something like this, I wrote my own. First off, I need recursive elements: ...
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Euclidian distance - optimization and casting

I'm trying to optimize a simple Euclidian distance function in C. It's for a DLL, and calculates distances from one point to many. I have: Version 1: ...
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C++ string_cast<> template function

In C++, to simplify string conversion between std::string and std::wstring, I created the following utility template functions: ...
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Multiple explicit cast operations

This sample code works fine, but it looks awful. How would you improve this? ...