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Want to find records with no associated records in Rails
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This is still pretty close to SQL, but it should get everyone with no friends in the first case:
Person.where('id NOT IN (SELECT DISTINCT(person_id) FROM friends)')
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How do I lowercase a string in C?
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It's in the standard library, and that's the most straight forward way I can see to implement such a function. So yes, just loop through the string and convert each character to lowercase.
Something trivial like this:
#inc...
VSTS 2010 SGEN : error : Could not load file or assembly (Exception from HRESULT: 0x80131515)
I am experiencing a strange issue with VS2010. We use TFS to build our API dlls and we used to reference them in our projects usign a mapped network drive that was fully trusted. We have been working like that for at least two years and everything worked perfectly.
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Eclipse secure storage
Is it possible to disable completely the secure storage password of Eclipse? I am running Eclipse Helios on Windows 7.
7 An...
Calling C/C++ from Python?
... look at Boost.Python. Here is the short introduction taken from their website:
The Boost Python Library is a framework for interfacing Python and
C++. It allows you to quickly and seamlessly expose C++ classes
functions and objects to Python, and vice-versa, using no special
tools -- just...
Default constructor with empty brackets
...oblem:
std::ifstream ifs("file.txt");
std::vector<T> v(std::istream_iterator<T>(ifs), std::istream_iterator<T>());
v is interpreted as a declaration of function with 2 parameters.
The workaround is to add another pair of parentheses:
std::vector<T> v((std::istream_iterat...
Are there any standard exit status codes in Linux?
A process is considered to have completed correctly in Linux if its exit status was 0.
10 Answers
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Django CharField vs TextField
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It's a difference between RDBMS's varchar (or similar) — those are usually specified with a maximum length, and might be more efficient in terms of performance or storage — and text (or similar) types — those are usuall...
Git: add vs push vs commit
What is the difference between git add , push and commit ?
8 Answers
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AngularJS : Where to use promises?
... you and others when you try to read the documentation on the $q service. It took me a while to understand it.
Let's set aside AngularJS for a moment and just consider the Facebook API calls. Both the API calls use a callback mechanism to notify the caller when the response from Facebook is avail...