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Use curly braces to initialize a Set in Python
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There are two obvious issues with the set literal syntax:
my_set = {'foo', 'bar', 'baz'}
It's not available before Python 2.7
There's no way to express an empty set using that syntax (using {} creates an empty dict)
Those may or may not be important to you.
The section of the docs outlin...
Easiest way to convert int to string in C++
...t i = 42;
std::string s = sstr( "i is: ", i );
puts( sstr( i ).c_str() );
Foo x( 42 );
throw std::runtime_error( sstr( "Foo is '", x, "', i is ", i ) );
Original answer:
Since "converting ... to string" is a recurring problem, I always define the SSTR() macro in a central header of my C++ sour...
Postgres: How to do Composite keys?
...annot understand the syntax error in creating a composite key. It may be a logic error, because I have tested many varieties.
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How do you manage databases in development, test, and production?
I've had a hard time trying to find good examples of how to manage database schemas and data between development, test, and production servers.
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How to start an application without waiting in a batch file?
...a guess here, but your start invocation probably looks like this:
start "\Foo\Bar\Path with spaces in it\program.exe"
This will open a new console window, using “\Foo\Bar\Path with spaces in it\program.exe” as its title.
If you use start with something that is (or needs to be) surrounded by ...
Unicode characters in URLs
In 2010, would you serve URLs containing UTF-8 characters in a large web portal?
7 Answers
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Can an Android Toast be longer than Toast.LENGTH_LONG?
When using setDuration() for a Toast, is it possible to set a custom length or at least something longer than Toast.LENGTH_LONG ?
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Do I need dependency injection in NodeJS, or how to deal with …?
I currently creating some experimental projects with nodejs. I have programmed a lot Java EE web applications with Spring and appreciated the ease of dependency injection there.
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Is it possible to install another version of Python to Virtualenv?
I have a shared account in a web-hosting that has Python 2.4 installed, but my code is not compatible with 2.4. Is it possible to install Python 2.6 directly to Virtualenv?
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Non greedy (reluctant) regex matching in sed?
...uence of digits) Live demo:
$ sed -r 's/([0-9]+).*|./\1/g' <<< 'foo 12 bar 34'
12
How does it work?
This regex benefits from an alternation |. At each position engine tries to pick the longest match (this is a POSIX standard which is followed by couple of other engines as well) which...