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What exactly is nullptr?
...constant can be converted to std::nullptr_t. The opposite direction is not allowed. This allows overloading a function for both pointers and integers, and passing nullptr to select the pointer version. Passing NULL or 0 would confusingly select the int version.
A cast of nullptr_t to an integral ty...
Why is sed not recognizing \t as a tab?
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Not all versions of sed understand \t. Just insert a literal tab instead (press Ctrl-V then Tab).
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Writing your own STL Container
...or_tag,std::random_access_iterator_tag. Also note that the below is technically more strict than required, but this is the idea. Note that the vast majority of the "standard" functions are technically optional, due to the awesomeness that is iterators.
template <class T, class A = std::allocator...
How to query MongoDB with “like”?
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Actually, it depends. If the query doesn't use an index, and must do a table scan, then it can certainly be expensive. If you're doing a 'starts with' regex query, then that can use an index. Best to run an explain() to see what'...
How to display a specific user's commits in svn log?
... if you want to search more than one author, svn log --search foo --search bar -l 30 . If multiple --search options are provided, a log message is shown if it matches any of the provided search patterns.
– zhuguowei
Mar 17 '16 at 12:30
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Adding a new entry to the PATH variable in ZSH
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Should it not be 'path+=:/foo/bar'? (with a colon)
– andrew lorien
Sep 19 '17 at 7:39
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How do you install Boost on MacOS?
How do you install Boost on MacOS?
Right now I can't find bjam for the Mac.
10 Answers
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Quickest way to convert a base 10 number to any base in .NET?
...comments, Convert.ToString only supports the following limited - but typically sufficient - set of bases: 2, 8, 10, or 16.
Update (to meet the requirement to convert to any base):
I'm not aware of any method in the BCL which is capable to convert numbers to any base so you would have to write you...
Left Align Cells in UICollectionView
...ep their size, add the following at the top of the closure in the forEach call:
guard layoutAttribute.representedElementCategory == .cell else {
return
}
Objective-C:
- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect {
NSArray *attributes = [super layoutAttributesForElementsI...
What are dictionary view objects?
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Dictionary views are essentially what their name says: views are simply like a window on the keys and values (or items) of a dictionary. Here is an excerpt from the official documentation for Python 3:
>>> dishes = {'eggs': 2, 'sausage': 1, ...