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Further understanding setRetainInstance(true)
...cause it does have some useful information, but sadly none of it is linked from setRetainInstance(). From the page about fragments
Note: Each fragment requires a unique identifier that the system can
use to restore the fragment if the activity is restarted (and which
you can use to capture t...
How do you remove duplicates from a list whilst preserving order?
Is there a built-in that removes duplicates from list in Python, whilst preserving order? I know that I can use a set to remove duplicates, but that destroys the original order. I also know that I can roll my own like this:
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How to return an NSMutableArray from an NSSet
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I resolved crashing by using NSMutableArray's method 'addObjectsFromArray' to assign all NSSet objects to NSMutableArray like:
[mutableArray addObjectsFromArray:[cg_Schedule.schedule_Days allObjects]];
Hope this will helps you.
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Retrieving parameters from a URL
...parse_qs(parsed.query)['def']
Python 3:
import urllib.parse as urlparse
from urllib.parse import parse_qs
url = 'http://foo.appspot.com/abc?def=ghi'
parsed = urlparse.urlparse(url)
print(parse_qs(parsed.query)['def'])
parse_qs returns a list of values, so the above code will print ['ghi'].
Her...
Is it expensive to use try-catch blocks even if an exception is never thrown?
... stack and seeing if any try blocks exist that would catch this exception. From a layman's perspective, try may as well be free. It's actually throwing the exception that costs you - but unless you're throwing hundreds or thousands of exceptions, you still won't notice the cost.
try has some mino...
Spring 3 MVC accessing HttpRequest from controller
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Doesn't doing it this way prevent the controller bean from being a singleton?
– jjmontes
Oct 30 '13 at 13:07
2
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Why is XOR the default way to combine hashes?
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answering to the exercise: from the 16 possible different a XXX b operations (0, a & b, a > b, a, a < b, b, a % b, a | b, !a & !b, a == b, !b, a >= b, !a, a <= b, !a | !b, 1), the following have 50%-50% distributions of 0s and 1s, a...
How do I prevent the iPhone screen from dimming or turning off while my application is running?
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IMHO it makes no difference from where you call this. It is always the entire app hit and each view is kept on screen, not dimmed.
– decades
Nov 19 '18 at 21:39
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How does collections.defaultdict work?
...igure out what this method means. Can somebody help? Here are two examples from the python docs
15 Answers
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Access Container View Controller from Parent iOS
...the new Container View but am not quite sure how to access it's controller from the containing view.
11 Answers
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