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When should TaskCompletionSource be used?

...n NuGet which allows the async/await keywords in .NET 4.0 projects (VS2012 and higher is recommended). – Erik Feb 1 '14 at 18:41 1 ...
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How to design RESTful search/filtering? [closed]

I'm currently designing and implementing a RESTful API in PHP. However, I have been unsuccessful implementing my initial design. ...
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What is the difference between sites-enabled and sites-available directory?

What is use of these two directories in apache2 and how can we do it? 3 Answers 3 ...
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In c# is there a method to find the max of 3 numbers?

...e, but not regularly. (Note that this is likely to be more efficient than Andrew's LINQ-based answer - but obviously the more elements you have the more appealing the LINQ approach is.) EDIT: A "best of both worlds" approach might be to have a custom set of methods either way: public static class...
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JavaScript - get the first day of the week from current date

...get the first day of the week. For example: today is the 11th of November, and a Thursday; and I want the first day of this week, which is the 8th of November, and a Monday. I need the fastest method for MongoDB map function, any ideas? ...
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dplyr: “Error in n(): function should not be called directly”

... I presume you have dplyr and plyr loaded in the same session. dplyr is not plyr. ddply is not a function in the dplyr package. Both dplyr and plyr have the functions summarise/summarize. Look at the results of conflicts() to see masked objects. ...
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Can I set subject/content of email using mailto:?

... Yes, look all tips and tricks with mailto: http://www.angelfire.com/dc/html-webmaster/mailto.htm mailto subject example: <a href="mailto:no-one@snai1mai1.com?subject=free chocolate">example</a> mailto with content: ...
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How to Import .bson file format on mongodb

I've exported the database on the server using mongodump command and dump is stored in .bson file. I need to import that in my local server using mongorestore command. However it's not working. What is the correct mongorestore command and what are the other tools to restore db ? ...
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Is it a good idea to use Google Guava library for Android development?

I am involved in the development of Android application which is a rather "thick" mobile client for a Web service. It heavily communicates with the server but also has a lot of inner logic too. So, I decided to use some features of Google Guava library to simplify development process. Here is a li...
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Unique combination of all elements from two (or more) vectors

... this maybe what you are after > expand.grid(a,b) Var1 Var2 1 ABC 2012-05-01 2 DEF 2012-05-01 3 GHI 2012-05-01 4 ABC 2012-05-02 5 DEF 2012-05-02 6 GHI 2012-05-02 7 ABC 2012-05-03 8 DEF 2012-05-03 9 GHI 2012-05-03 10 ABC 2012-05-04 11...