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Postgres: How to do Composite keys?
I cannot 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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Opening a folder in explorer and selecting a file
...s method to get it to work in all cases:
[DllImport("shell32.dll", SetLastError = true)]
public static extern int SHOpenFolderAndSelectItems(IntPtr pidlFolder, uint cidl, [In, MarshalAs(UnmanagedType.LPArray)] IntPtr[] apidl, uint dwFlags);
[DllImport("shell32.dll", SetLastError = true)]
public st...
Listing all permutations of a string/integer
...#.
– Jon Schneider
Jan 26 '18 at 22:05
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What is the difference between join and merge in Pandas?
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The error seems to be saying that it expects the multi index on right that is the same depth as the length on on. That makes sense to me sort of. I can accept that the semantics are different. But I'd like to know if I can get th...
What's wrong with this 1988 C code?
...to him what was going on. He would have changed the macro for IN, with no errors and then the macro for OUT with the two errors, the second of which would be complaining about the semicolon he had just added.
– jmoreno
Dec 27 '11 at 22:07
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How does generic lambda work in C++14?
...= [](auto a) { return a; };
int main() {}
With g++ 4.7:
prog.cpp:1:24: error: parameter declared ‘auto’
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However, the way it might be implemented in C++14 as per the Portland proposal for generic lambdas:
[](const& x, & y){ return x + y; }
This would yield for the biggest p...
How can Perl's print add a newline by default?
In Perl most of my print statements take the form
8 Answers
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Regular expression \p{L} and \p{N}
I am new to regular expressions and have been given the following regular expression:
2 Answers
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完美解决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题 - 更多...
...新的问题问题描述：phpcms批量移动内容 文章，批量更新URL -> "批量更新内容页"后，发现原内容的评论、新闻心情全部丢失，这还不算差，后台评论排...问题描述：
phpcms批量移动内容/文章，”批量更新URL“ -> "批量更新内容页"...
How to convert String to long in Java?
I got a simple question in Java: How can I convert a String that was obtained by Long.toString() to long ?
9 Answers
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