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

learn more… | top users | synonyms

7
votes
5answers
394 views

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 ...
2
votes
1answer
34 views

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 ...
0
votes
3answers
99 views

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 ...
3
votes
2answers
154 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 ...
6
votes
1answer
190 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. ...
5
votes
1answer
127 views

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 ...
10
votes
3answers
399 views

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 ...
5
votes
2answers
80 views

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 ...
3
votes
3answers
73 views

Limited typecasting with regex

long time user/lurker at stackoverflow, first time here. I've seen a lot of questions like this have people point to this section of the StackExchange network so I hope this is the right place. I'm ...
4
votes
1answer
127 views

Different Constructors, Same Implementation

I have this class containing two constructors with different signatures but they do the same thing: ...
1
vote
1answer
202 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: ...
4
votes
2answers
654 views

Pointer casting. Correct alignment and code style

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 ...
6
votes
1answer
162 views

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: ...
2
votes
1answer
68 views

Are my implicit type conversions correct? [closed]

I'm having some issues with my code and I'm trying to rule out any syntax or programming mistakes. One of the things I'm trying to rule out is the different variable types used in my equations. I'm ...
4
votes
1answer
337 views

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 ...
2
votes
2answers
86 views

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 ...
2
votes
2answers
88 views

Could I get rid of all these downcasts?

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 ...
3
votes
1answer
329 views

Returning a more specific class

I would appreciate some feedback on my design of a few classes to query the Trakt.tv API. ...
8
votes
1answer
2k views

Improve my 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 ...
10
votes
3answers
213 views

Cast inside the method or let the client code cast, which one is better?

I have two choices of implementing a method, the first one is a generic type where the client code does not have to cast ...
2
votes
2answers
2k views

(sort of) casting types in Ruby: changing class of an instance [closed]

I defined the class Rectangle: ...
2
votes
1answer
124 views

Is it safe to cast a pointer to non-void function into a pointer to void function?

I thought it was a good idea to use this in my C++ projects: ...
4
votes
1answer
103 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. ...
2
votes
1answer
91 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 ...
1
vote
1answer
654 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 ...
3
votes
1answer
564 views

Is there a better way to cast between decimal and generic in this C# code sample?

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 ...
1
vote
2answers
94 views

Over-Riding User Input

Here's a trivial example: if type(length) != int: length = 16 as opposed to: ...
1
vote
1answer
2k views

Casting const pointer to non-const pointer when using struct iovec

struct iovec is defined in <uio.h> by the following way: ...
3
votes
2answers
3k views

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: ...
10
votes
2answers
419 views

C++ int_cast<> function for checked casts?

In order to detect run-time integer casting problems, I've created this function*: ...
2
votes
2answers
162 views

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

Currently I have this code: ...
6
votes
2answers
669 views

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: ...
3
votes
4answers
238 views

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: ...
6
votes
2answers
3k views

C++ string_cast<> template function

In C++, to simplify string conversion between std::string and std::wstring, I created the following utility template functions: ...
4
votes
2answers
584 views

Multiple explicit cast operations

This sample code works fine, but it looks awful. How would you improve this? ...
10
votes
2answers
513 views

Loops for removing unnecessary lines

I have the following method: ...