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NSUserDefaults removeObjectForKey vs. setObject:nil
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Swift 3.0
The below answer is no longer the case when I tested this.
When set to nil the result is NSCFData being stored. Possibly an NSNull object reference, but I am not positive.
To completely remove a value for a key use...
Cast an instance of a class to a @protocol in Objective-C
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The correct way to do this is to do:
if ([self.myViewController conformsToProtocol:@protocol(MyProtocol)])
{
UIViewController <MyProtocol> *vc = (UIViewController <MyProtocol> *) self.myViewController;
[vc protocolMethod];
}
The UIV...
Filtering DataGridView without changing datasource
... is your data source? My example assumes that you are using a DataTable. If you are using something else, check your casting. "as DataTable" in my example.
– Brad Bruce
Jan 25 '18 at 1:22
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what is the right way to treat Python argparse.Namespace() as a dictionary?
If I want to use the results of argparse.ArgumentParser() , which is a Namespace object, with a method that expects a dictionary or mapping-like object (see collections.Mapping ), what is the right way to do it?
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How to identify whether a file is normal file or directory
...h.islink() for symlinks for instance. Furthermore, these all return False if the file does not exist, so you'll probably want to check with os.path.exists() as well.
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How to append contents of multiple files into one file
...irst character in file 1.txt? You can find out by using od -c, and seeing if the first character is a \n.
– radical7
Aug 2 '13 at 0:04
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Better way to check variable for null or empty string?
Since PHP is a dynamic language what's the best way of checking to see if a provided field is empty?
10 Answers
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How to rebase local branch with remote master
... following: Your branch and 'origin/b1' have diverged, # and have 3 and 2 different commits each, respectively. Seems like another git pull is needed. Is this correct or am I missing something here?
– Dror
Oct 29 '13 at 22:00
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onTouchListener warning: onTouch should call View#performClick when a click is detected
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@longilong Well if you wish you can also set it to use switch-case, but that's logically the same...
– android developer
Sep 5 '14 at 14:27
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Django REST framework: non-model serializer
...ired calculations and returns its results in a tuple to the REST api view. If JSON and/or XML fits your needs, django-rest-framework will take care of the serialization for you.
You can skip steps 2 and 3 in this case, and just use one class for calculations and one for presentation to the API cons...