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Coalesce function for PHP?
...ay element is falsey will result in an error. $input['properties']['range_low'] ?: '?'
– Keyo
Jul 12 '11 at 23:28
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Django queries - id vs pk
...you don't need to care whether the primary key field is called id or object_id or whatever.
It also provides more consistency if you have models with different primary key fields.
share
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improve t...
Trying to understand CMTime and CMTimeMake
...llowing code makes the concept more clear:
1)
Float64 seconds = 5;
int32_t preferredTimeScale = 600;
CMTime inTime = CMTimeMakeWithSeconds(seconds, preferredTimeScale);
CMTimeShow(inTime);
The above code gives:
{3000/600 = 5.000}
Which means a total duration of 5 seconds, with 3000 frames with...
What is the LD_PRELOAD trick?
...
If you set LD_PRELOAD to the path of a shared object, that file will be loaded before any other library (including the C runtime, libc.so). So to run ls with your special malloc() implementation, do this:
$ LD_PRELOAD=/path/to/my/malloc....
ViewPager and fragments — what's the right way to store fragment's state?
... onCreate(Bundle savedInstanceState) {
setContentView(R.layout.activity_main);
if (savedInstanceState != null)
viewpagerid=savedInstanceState.getInt("viewpagerid", -1 );
MyFragmentPagerAdapter titleAdapter = new MyFragmentPagerAdapter (getSupportFragmentManager() , this); ...
Rails 4 multiple image or file upload using carrierwave
... from a file selection window using Rails 4 and CarrierWave? I have a post_controller and post_attachments model. How can I do this?
...
Find running median from a stream of integers
...t running median with O(lg n) updates where n is the window size'
def __init__(self, n, iterable):
self.it = iter(iterable)
self.queue = deque(islice(self.it, n))
self.skiplist = IndexableSkiplist(n)
for elem in self.queue:
self.skiplist.insert(elem)
...
Difference between Ctrl+Shift+F and Ctrl+I in Eclipse
...s are at the beginning. It doesn't work if you have something like int i = _____5; ( _ = empty space ). Only Ctrl + Shift + F will convert this line to int i = 5;.
– ROMANIA_engineer
Oct 26 '14 at 7:54
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Change string color with NSAttributedString?
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Thanks Anoop, but no luck for me. -[__NSCFString _ui_synthesizeAttributedSubstringFromRange:usingDefaultAttributes:]: unrecognized selector sent to instance 0x1f845af0 2013-01-11 16:27:34.939 yellaProto[7829:907] *** Terminating app due to uncaught exception 'N...
C# Sortable collection which allows duplicate keys
...Format("{0}:{1}", tuple.Item1,tuple.Item2));
}
int expected_first = 1;
int expected_last = 3;
int first = list.First().Item1; //requires using System.Linq
int last = list.Last().Item1; //requires using System.Linq
Assert.AreEqual(expected_first, fi...