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In which situations do we need to write the __autoreleasing ownership qualifier under ARC?

...All of this is very well explained in the ARC transition guide. In your NSError example, the declaration means __strong, implicitly: NSError * e = nil; Will be transformed to: NSError * __strong error = nil; When you call your save method: - ( BOOL )save: ( NSError * __autoreleasing * ); T...
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Why would a JavaScript variable start with a dollar sign? [duplicate]

...ful. – pedromanoel Jan 28 '14 at 11:05 10 Thumbs up for the $. But underscores in variable names ...
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How to clear all s’ contents inside a parent ?

... answered Nov 9 '09 at 16:05 QuentinQuentin 755k9292 gold badges10161016 silver badges11551155 bronze badges ...
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“Cross origin requests are only supported for HTTP.” error when loading a local file

...are loading the model using either file:// or C:/, which stays true to the error message as they are not http:// So you can either install a webserver in your local PC or upload the model somewhere else and use jsonp and change the url to http://example.com/path/to/model Origin is defined in RFC-6...
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Error renaming a column in MySQL

... I think the column contains a foreign key to getting the error of the answer so you have to Drop foreign key, alter table, and add foreign key (it's better to backup first) and u can alter it by only changing the name in right click on the table - alter table –...
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How to delete the contents of a folder?

... @JohnHany, I believe you want to catch OSError. – MikeB Apr 7 '18 at 20:13 I'm getti...
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Row count with PDO

... | edited May 14 at 9:05 Your Common Sense 149k2929 gold badges182182 silver badges298298 bronze badges ...
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vector::at vs. vector::operator[]

...ell, the official response to that is that out_of_range derives from logic_error, and other programmers "should" know better than to catch logic_errors upstream and ignore them. assert can be ignored too if your colleagues are keen not to know about their mistakes, it's just harder because they have...
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How do I send an HTML email?

...alusC 953k341341 gold badges34193419 silver badges34053405 bronze badges ...
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JSON.NET Error Self referencing loop detected for type

... Use JsonSerializerSettings ReferenceLoopHandling.Error (default) will error if a reference loop is encountered. This is why you get an exception. ReferenceLoopHandling.Serialize is useful if objects are nested but not indefinitely. ReferenceLoopHandling.Ignore will not seri...