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Creating an abstract class in Objective-C
...on of an abstract class, however. In fact, there is nothing to stop a user from providing implementations of abstract methods via a category (i.e. at runtime). You can force a user to at least override certain methods by raising an exception in those methods implementation in your abstract class:
[...
How to check if running in Cygwin, Mac or Linux?
... As one commenter notes, you can run the bash program, passing the script, from cmd itself and this may result in the paths not being set up as needed.
If you are doing that, it's your responsibility to ensure the correct executables (i.e., the CygWin ones) are being called, possibly by modifying t...
Does JavaScript have the interface type (such as Java's 'interface')?
... is exactly the set of functions that the code uses (and the return values from those functions), and with duck typing, you get that for free.
Now, that's not to say your code won't fail halfway through, if you try to call some_dog.quack(); you'll get a TypeError. Frankly, if you're telling dogs t...
What's the difference between unit, functional, acceptance, and integration tests? [closed]
...mething useful. Also, another thing that differentiates integration tests from unit tests is the environment. Integration tests can and will use threads, access the database or do whatever is required to ensure that all of the code and the different environment changes will work correctly.
If y...
Why does Google +1 record my mouse movements? [closed]
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Isn't Math.random() seeded from the current timestamp? If so, with a widely deployed button like this, you'd expect a lot of collisions. Might explain the extra efforts.
– Yahel
Jul 24 '11 at 3:12
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Difference between SPI and API?
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From Effective Java, 2nd Edition:
A service provider framework is a
system in which multiple service
providers implement a service, and the
system makes the implementations
available to its clients, decoupling
t...
Why is an array not assignable to Iterable?
...h there are a gazillion operations that one would want to use an array for from the start. Oh, that's right, arrays were the only strongly typed collections before generics came along as a sorry hindsight.
– fatuhoku
Nov 28 '11 at 12:02
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When would you call java's thread.run() instead of thread.start()?
...urrently working with: I have a program that can either be run as a GUI or from the command line. In the GUI case, I want the object that does the heavy lifting to run on a separate thread and send updates to the gui. In the command line mode, I don't need that separate thread.
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Sum a list of numbers in Python
...pt the last. Then the averages we want are the averages of each pair taken from the two lists. We use zip to take pairs from two lists.
I assume you want to see decimals in the result, even though your input values are integers. By default, Python does integer division: it discards the remainder. T...
How to detect if CMD is running as Administrator/has elevated privileges?
From inside a batch file, I would like to test whether I'm running with Administrator/elevated privileges.
13 Answers
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