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How does the new automatic reference counting mechanism work?
...y management and garbage collection, ARC gives you the best of both worlds by cutting out the need to write retain / release code, yet not having the halting and sawtooth memory profiles seen in a garbage collected environment. About the only advantages garbage collection has over this are its abil...
Where does the iPhone Simulator store its data?
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Please see updated response below by dsmudger, it is the correct answer at the moment.
– Tom Susel
Apr 22 '13 at 10:04
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Can I change the size of UIActivityIndicator?
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The size is fixed by the style. It's a standardized interface element so the API doesn't like to fiddle with it.
However, you probably could do a scaling transform on it. Not sure how that would affect it visually, however.
Just from a UI ...
- how to allow only one item selected?
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You want only one option by default, but the user can select multiple options by pressing the CTRL key. This is (already) exactly how the SELECT multiple is meant to behave.
See this: http://www.w3schools.com/tags/tryit.asp?filename=tryhtml_select_...
How to 'bulk update' with Django?
...ound are: a) use @transaction.atomic decorator, which improves performance by using a single transaction, or b) make a bulk insert in a temporary table, and then an UPDATE from the temporary table to the original one.
– Marc Garcia
Oct 24 '16 at 10:47
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Why does 2 mod 4 = 2?
... C + D (with D < B), then the quotient of the euclidian division of A
by B is C, and the remainder is D. If you divide 2 by 4, the quotient
is 0 and the remainder is 2.
Suppose you have A objects (that you can't cut). And you want to
distribute the same amount of those objects to B peo...
How to initialize an array in one step using Ruby?
...gs as the other answers above, note also that you can use enumerators in Ruby 1.8.7+ to create arrays; for example:
array = 1.step(17,3).to_a
#=> [1, 4, 7, 10, 13, 16]
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How do I get my C# program to sleep for 50 msec?
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Since now you have async/await feature, the best way to sleep for 50ms is by using Task.Delay:
async void foo()
{
// something
await Task.Delay(50);
}
Or if you are targeting .NET 4 (with Async CTP 3 for VS2010 or Microsoft.Bcl.Async), you must use:
async void foo()
{
// something
...
What's the difference between JavaScript and JScript?
...ript runs in Internet Explorer, it has access to different objects exposed by the browser (such as ActiveXObject)
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How to use MySQLdb with Python and Django in OSX 10.6?
...have pip, easy_install MySQL-python should work.
If your python is managed by a packaging system, you might have to use
that system (e.g. sudo apt-get install ...)
Below, Soli notes that if you receive the following error:
EnvironmentError: mysql_config not found
... then you have a further ...