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Type Checking: typeof, GetType, or is?
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All are different.
typeof takes a type name (which you specify at compile time).
GetType gets the runtime type of an instance.
is returns true if an instance is in the inheritance tree.
Example
class Animal { }
class Dog : Animal { }
void PrintTypes(Animal a) {
Console.WriteLine(a...
How does the new automatic reference counting mechanism work?
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Every new developer who comes to Objective-C has to learn the rigid rules of when to retain, release, and autorelease objects. These rules even specify naming conventions that imply the retain count of objects returned from methods. Memory managem...
reStructuredText tool support
...port it are scattered all over the Internet. The official tool list is incomplete and/or outdated, and can be updated only via commit privileges. For some time there was a comprehensive list at the Wikipedia reStructuredText page , but this apparently " did not meet the notability guideline for w...
Android activity life cycle - what are all these methods for?
...lways followed by onStart()
onStart():
Called when the activity is becoming visible to the user. Followed by
onResume() if the activity comes to the foreground.
onResume():
Called when the activity will start interacting with the user. At this
point your activity is at the top of the...
Function pointers, Closures, and Lambda
...omehow and after a search online I didn't find really any analysis of this comparison.
12 Answers
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Create a Date with a set timezone without using a string representation
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How to find the lowest common ancestor of two nodes in any binary tree?
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Nick Johnson is correct that a an O(n) time complexity algorithm is the best you can do if you have no parent pointers.) For a simple recursive version of that algorithm see the code in Kinding's post which runs in O(n) time.
But keep in mind that if your nodes have p...
Use C++ with Cocoa Instead of Objective-C?
...inding requirements make it very difficult to implement the Cocoa API in a compile-time bound, typed language like C++ⁱ. You can, of course, write a pure C++ app that runs on OS X. It just can't use the Cocoa APIs.
So, you have two options if you want to share code between C++ apps on other platf...
What are the benefits of using C# vs F# or F# vs C#? [closed]
I work for a tech company that does more prototyping than product shipment. I just got asked what's the difference between C# and F#, why did MS create F# and what scenarios would it be better than C#.
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Difference between add(), replace(), and addToBackStack()
...back stack. This means that the transaction will be remembered after it is committed, and will reverse its operation when later popped off the stack.
2) fragmentTransaction.replace(int containerViewId, Fragment fragment, String tag)
Description - Replace an existing fragment that was added to a co...