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Specifying an Index (Non-Unique Key) Using JPA
How do you define a field, eg email as having an index using JPA annotations. We need a non-unique key on email because there are literally millions of queries on this field per day, and its a bit slow without the key.
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List of ANSI color escape sequences
...er things) documents the SGR 38/48 control sequences for direct colour and indexed colour:
Information technology — Open Document Architecture (ODA) and interchange format: Document structures. T.412. International Telecommunication Union.
Information technology — Open Document Architecture ...
Get button click inside UITableViewCell
...emplate has some buttons. I want to access the button click along with the index of the cell clicked inside the view controller where I have defined the Table view.
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How do I find which rpm package supplies a file I'm looking for?
...ly would come with the php-devel package. I guessed that yum would install the mod_files.sh file with the php-devel x86_64 5.1.6-23.2.el5_3 package, but the file appears to not to be installed on my filesystem.
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How to initialize a private static const map in C++?
...ey,value> m1 = MyClass::getMyMap();
// then do work on m1 or
unsigned index = some predetermined value
MyClass::getMyMap().at( index ); // As long as index is valid this will
// retun map.second or map->second value so if in this case key is an
// unsigned and value is a std::string then...
__FILE__, __LINE__, and __FUNCTION__ usage in C++
...static string getScopedClassMethod( string thePrettyFunction )
{
size_t index = thePrettyFunction . find( "(" );
if ( index == string::npos )
return thePrettyFunction; /* Degenerate case */
thePrettyFunction . erase( index );
index = thePrettyFunction . rfind( " " );
if ( index == ...
Apply .gitignore on an existing repository already tracking large number of files
...run this command:
git rm -r --cached .
This removes everything from the index, then just run:
git add .
Commit it:
git commit -m ".gitignore is now working"
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pandas three-way joining multiple dataframes on columns
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This didn't quite work for my dfs with column multi indexes (it was injecting the 'on' as a column which worked for the first merge, but subsequent merges failed), instead I got it to work with: df = reduce(lambda left, right: left.join(right, how='outer', on='Date'), dfs)
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pass post data with window.location.href
...n attribute of the form to the URL and the method attribute to POST, then call the submit method on the form tag.
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Unique Key constraints for multiple columns in Entity Framework
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With Entity Framework 6.1, you can now do this:
[Index("IX_FirstAndSecond", 1, IsUnique = true)]
public int FirstColumn { get; set; }
[Index("IX_FirstAndSecond", 2, IsUnique = true)]
public int SecondColumn { get; set; }
The second parameter in the attribute is where you...