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Check empty string in Swift?
In Objective C, one could do the following to check for strings:
14 Answers
14
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opengl: glFlush() vs. glFinish()
...nce difference, it means you're doing something wrong. As some others mentioned, you don't need to call either, but if you do call glFinish, then you're automatically losing the parallelism that the GPU and CPU can achieve. Let me dive deeper:
In practice, all the work you submit to the driver is b...
How to share my Docker-Image without using the Docker-Hub?
...'s clear that Registry 2.0 is a ready for use replacement for the original one. It seems to miss some basic functionality such as search stackoverflow.com/questions/30113726/docker-registry-2-0-api-v2
– JoshRivers
Jun 16 '15 at 19:06
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How to understand nil vs. empty vs. blank in Ruby
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As mentioned in the question, some non-empty strings count as blank.
– Andrew Grimm
May 20 '09 at 23:20
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How do the post increment (i++) and pre increment (++i) operators work in Java?
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Are you sure a == 9 in the second one?
– Pete Kirkham
Mar 3 '10 at 13:10
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Why doesn't Python have a sign function?
...nt sign this way, and it will still be compatible with the IEEE stuff mentioned by others:
>>> sign = functools.partial(math.copysign, 1) # either of these
>>> sign = lambda x: math.copysign(1, x) # two will work
>>> sign(-4)
-1.0
>>> sign(3)
1.0
>>> sig...
Remove a marker from a GoogleMap
...for Android, we can add a marker , but there is no way to (easily) remove one.
11 Answers
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jQuery get values of checked checkboxes into array
...Thanks for the solution, it works.
– if __name__ is None
Apr 23 '13 at 15:16
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Do declared properties require a corresponding instance variable?
...ide the auto-coded getter/setter by specifying your own. This is commonly done with the managedObjectContext property which is lazily loaded. Thus, you declare your managedObjectContext as a property, but then also write a -(NSManagedObjectContext *)managedObjectContext method. Recall that a method,...
Get table column names in MySQL?
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@Pacerier For one thing, the second one won't work as a subquery.
– WAF
Mar 31 '15 at 18:11
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