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Rails and PostgreSQL: Role postgres does not exist
I have installed PostgreSQL on my Mac OS Lion, and am working on a rails app. I use RVM to keep everything separate from my other Rails apps.
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How to generate JAXB classes from XSD?
...L. With this we decided to use JAXB. So far, we manually coded the Models for the XML.
10 Answers
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Android. Fragment getActivity() sometimes returns null
In developer console error reports sometimes I see reports with NPE issue. I do not understand what is wrong with my code. On emulator and my device application works good without forcecloses, however some users get NullPointerException in fragment class when the getActivity() method is called.
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Android - get children inside a View?
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for(int index = 0; index < ((ViewGroup) viewGroup).getChildCount(); index++) {
View nextChild = ((ViewGroup) viewGroup).getChildAt(index);
}
Will that do?
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using extern template (C++11)
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You should only use extern template to force the compiler to not instantiate a template when you know that it will be instantiated somewhere else. It is used to reduce compile time and object file size.
For example:
// header.h
template<typename T>
void R...
Is there a .NET/C# wrapper for SQLite? [closed]
I'd sort of like to use SQLite from within C#.Net, but I can't seem to find an appropriate library. Is there one? An official one? Are there other ways to use SQLite than with a wrapper?
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Why is Java's Iterator not an Iterable?
Why does the Iterator interface not extend Iterable ?
16 Answers
16
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Is assert evil? [closed]
The Go language creators write :
21 Answers
21
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Better way to cast object to int
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You have several options:
(int) — Cast operator. Works if the object already is an integer at some level in the inheritance hierarchy or if there is an implicit conversion defined.
int.Parse()/int.TryParse() — For converting from a string of unknown format.
int.Parse...
C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...验总结第1条：慎重选择容器类型。标准STL序列容器：vector、string、deque和list。标准STL关联容器：set、multiset、map和multimap。非标准序列容...
第1条：慎重选择容器类型。
标准STL序列容器：vector、string、deque和list。
标准STL关联容...