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When should you not use virtual destructors?
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By saying you have "no intention", you're making a huge assumption about how your class will get used. It seems to me the simplest solution in most cases (which should therefore the default) should be to have virtual destruct...
Fatal error: Class 'ZipArchive' not found in
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As mentioned by @Luddig on ubuntu server after sudo apt-get install php7.0-zip you will need to restart the apache server sudo systemctl restart apache2
– hashmi
May 25 '17 at 10:25
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Should Github be used as a CDN for javascript libraries? [closed]
...aScript files that aren't served with the correct content-type are blocked by default. You can see that in action on the BlockUI demo page, for example:
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How to read the value of a private field from a different class in Java?
...htable) f.get(obj); //IllegalAccessException
EDIT: as has been commented by aperkins, both accessing the field, setting it as accessible and retrieving the value can throw Exceptions, although the only checked exceptions you need to be mindful of are commented above.
The NoSuchFieldException woul...
Compare if two variables reference the same object in python
...ing, small numbers are usually reasonable default values) Python optimizes by preallocating small numbers (-5 to 256) and reuses the same integer object. Thus your example only works for numbers in this range. Try assigning something larger, i.e. 270. For more info look here
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How can “while (i == i) ;” be a non-infinite loop in a single threaded application?
...t atomic operation in multithreaded process, so if i value will be changed by other thread between pushes of it's value to stack on thread executing the loop, then that condition can be false.
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Convert NSArray to NSString in Objective-C
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NSString * result = [[array valueForKey:@"description"] componentsJoinedByString:@""];
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How can you undo the last git add?
...lt;file n>.
Also it's possible to unstage some of the changes in files by using git reset -p.
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How to cast an object in Objective-C
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Great answer. You could make it a little clearer by breaking out the cast and assignment into two lines.
– Guido Anselmi
Jun 3 '14 at 21:06
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Measuring text width to be drawn on Canvas ( Android )
...pplemental answer
There is a slight difference between the width returned by Paint.measureText and Paint.getTextBounds. measureText returns a width that includes the glyph's advanceX value padding the beginning and end of the string. The Rect width returned by getTextBounds does not have this padd...