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How do I use itertools.groupby()?
...owing example, items in xx are grouped by values in yy. In this case, one set of zeros is output first, followed by a set of ones, followed again by a set of zeros.
xx = range(10)
yy = [0, 0, 0, 1, 1, 1, 0, 0, 0, 0]
for group in itertools.groupby(iter(xx), lambda x: yy[x]):
print group[0], lis...
val-mutable versus var-immutable in Scala
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tl;dr: prefer var x: Set[Int] over val x: mutable.Set[Int] since if you pass x to some other function, in the former case, you are sure, that function cannot mutate x for you.
– pathikrit
Oct 3 '15 at 18:30
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Insert the carriage return character in vim
...ll convert it to the end of line character appropriate for your fileformat setting. ie enter :s/.../\^V^M/g.
– DerfK
Mar 9 '11 at 23:17
6
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Is cout synchronized/thread-safe?
...t does proper locking, or move to C++0x.
As a weak alternative, you could set cout to unbuffered. It is likely (although not guaranteed) that would skip all logic related to the buffer and call write directly. Although that might be prohibitively slow.
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VB.NET equivalent of C# property shorthand?
... @rap, now implement "public string FirstName {get; private set;}" in VB :P
– Blorgbeard is out
Mar 18 '14 at 21:11
3
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Browser support for URLs beginning with double slash
...ror page. I suspect a proxy or VPN or firewall security configuration they set internally. After updating the URL to use the https protocol, everything works fine.
– TwystO
Jan 10 '18 at 14:14
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The Definitive C++ Book Guide and List
...ok, but still good to know.
Exceptional C++ (Herb Sutter) Presented as a set of puzzles, this has one of the best and thorough discussions of the proper resource management and exception safety in C++ through Resource Acquisition is Initialization (RAII) in addition to in-depth coverage of a varie...
External VS2013 build error “error MSB4019: The imported project was not found”
...ready found the solution. DON'T remove the section from your project file. Set the right tools version in your build definition. This is very easy to do. Open your build definition and go to the "Process" page. Then under the "3. Advanced" group you have a property called "MSBuild Arguments". Place ...
Get Selected index of UITableView
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In didSelectRowAtIndexPath, set an interface declared NSIndexPath as the indexpath returned. Then you can scroll to that variable. If you need help, comment and I can give some sample code.
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What does the > (greater than bracket) mean beside file names in Eclipse's Package Explorer?
I'm setting up a new dev machine with Eclipse 3.7 Indigo. After pulling a my code down from SVN, the source tree in the Package Explorer is intermittently littered with a > to the left of the file name The parent package names have them too. (Note that this is an AspectJ project, but I don't thi...