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Is is possible to check if an object is already attached to a data context in Entity Framework?

I am getting the following error when trying to attach an object that is already attached to a given context via context.AttachTo(...) : ...
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How are GCC and g++ bootstrapped?

This has been bugging me for a while. How do GCC and g++ compile themselves? 1 Answer ...
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close vs shutdown socket?

In C, I understood that if we close a socket, it means the socket will be destroyed and can be re-used later. 9 Answers ...
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Rails Migration: Remove constraint

I have a table in a Rails application which (in schema.rb) looks like: 2 Answers 2 ...
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Select last N rows from MySQL

I want to select last 50 rows from MySQL database within column named id which is primary key . Goal is that the rows should be sorted by id in ASC order, that’s why this query isn’t working ...
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How to return smart pointers (shared_ptr), by reference or by value?

Let's say I have a class with a method that returns a shared_ptr . 2 Answers 2 ...
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How do I make sure every glyph has the same width?

I've noticed that even at the same font size, there is not a standard width. How can I use these in front of a list of items so the words don't appear jagged? ...
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How to install GCC piece by piece with GMP, MPFR, MPC, ELF, without shared libraries?

How do I install GCC (the GNU Compiler Collection) piece by piece, using the current version, using the correct versions of dependencies, not using a package manager (like yum, rpm, apt, dpkg), and not using shared libraries? ...
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Check Whether a User Exists

I want to create a script to check whether a user exists. I am using the logic below: 17 Answers ...
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REST API Best practices: args in query string vs in request body

A REST API can have arguments in several places: 3 Answers 3 ...