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Default parameter for CancellationToken

I have some async code that I would like to add a CancellationToken to. However, there are many implementations where this is not needed so I would like to have a default parameter - perhaps CancellationToken.None . However, ...
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What are rvalues, lvalues, xvalues, glvalues, and prvalues?

In C++03, an expression is either an rvalue or an lvalue . 11 Answers 11 ...
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How to force LINQ Sum() to return 0 while source collection is empty

Basically when I do the following query, if no leads were matched the following query throws an exception. In that case I'd prefer to have the sum equalize 0 rather than an exception being thrown. Would this be possible in the query itself - I mean rather than storing the query and checking query.A...
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What does the caret (^) character mean?

I saw an answer to a question here that helps restore a deleted file in git. 8 Answers ...
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clang error: unknown argument: '-mno-fused-madd' (python package installation failure)

I get the following error when attempting to install psycopg2 via pip on Mavericks 10.9: 14 Answers ...
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How do I globally configure RSpec to keep the '--color' and '--format specdoc' options turned on

How do I set global configuration for RSpec in Ubuntu. 6 Answers 6 ...
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How can I delete a newline if it is the last character in a file?

I have some files that I'd like to delete the last newline if it is the last character in a file. od -c shows me that the command I run does write the file with a trailing new line: ...
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Find and restore a deleted file in a Git repository

Say I'm in a Git repository. I delete a file and commit that change. I continue working and make some more commits. Then, I find I need to restore that file. ...
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Change the Target Framework for all my projects in a Visual Studio Solution

I need to change the target framework for all projects. I have many solutions with hundreds of projects. 10 Answers ...
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How to turn on line numbers in IDLE?

In the main shell of IDLE, errors always return a line number but the development environment doesn't even have line numbers. Is there anyway to turn on line numbers? ...