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How to change a nullable column to not nullable in a Rails migration?
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edited Mar 17 '18 at 12:42
Dorian
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How to rethrow InnerException without losing stack trace in C#?
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In .NET 4.5 there is now the ExceptionDispatchInfo class.
This lets you capture an exception ...
I didn't find “ZipFile” class in the “System.IO.Compression” namespace
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<PackageReference Include="System.IO.Compression.ZipFile" Version="4.3.0" />
If you are working on .NET Framework without NuGet, you need to add a dll reference to the assembly, "System.IO.Compression.FileSystem.dll" - and ensure you are using at least .NET 4.5 (since it doesn't exist i...
Is there a benefit to defining a class inside another class in Python?
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dF.dF.
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How to discover number of *logical* cores on Mac OS X?
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configure: error: C compiler cannot create executables
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You have an old set of developer tools. gcc is reporting its version as 4.0.1. This may be left over from migrating from an older version of the OS. If you've installed Xcode 4.3.x, you need to launch it, go into its preferences, select the Downloads tab, and click "Install" next to the Command L...
What's the difference between a temp table and table variable in SQL Server?
...If you don't have a unique column, you can use an identity column.) SQL 2014 has non-unique indexes too.
Table variables don't participate in transactions and SELECTs are implicitly with NOLOCK. The transaction behaviour can be very helpful, for instance if you want to ROLLBACK midway through a proc...
Can the Unix list command 'ls' output numerical chmod permissions?
...sible when listing a directory to view numerical unix permissions such as 644 rather than the symbolic output -rw-rw-r--
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Django Reverse with arguments '()' and keyword arguments '{}' not found
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解决 A potentially dangerous Request.Form value was detected from the ...
...r后，发现部分表单无法保存，经测试是由于使用了ASP.NET 4.0，默认安全性设置较高造成的。当表单...近日有客户在升级到Windows 2012 Server后，发现部分表单无法保存，经测试是由于使用了ASP.NET 4.0，默认安全性设置较高造成的。当...