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How do I replace NA values with zeros in an R dataframe?
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@RenatoDinhaniConceição: if you tried something already, it's helpful to share that information when you ask the question; it helps to narrow down where the problem may be.
– Aaron left Stack Overflow
Nov...
Using ThreadPool.QueueUserWorkItem in ASP.NET in a high traffic scenario
...y easy to wrap if you want to push it up more levels; you could create a façade around the async methods and wrap them with a single method that uses an Action<T> as a callback, for example. If you mean that the choice of whether to use a worker thread or I/O thread happens at the lowest lev...
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
... meant "Object[] arr = new Integer[1];".
– Emre Sevinç
Jan 2 '13 at 13:46
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In what order are Panels the most efficient in terms of render time and performance?
There are many times when more than one panel would suitable for the layout I want, however I know there is a difference in render times for different panel types.
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What is the best way to use a HashMap in C++?
...ted Dec 7 '18 at 13:05
Jean-François Fabre♦
122k1111 gold badges9797 silver badges156156 bronze badges
answered Aug 26 '10 at 18:26
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Is git-svn dcommit after merging in git dangerous?
...ouldn't git svn rebase without errors.
– João Bragança
Dec 22 '10 at 23:31
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Isn't this exactl...
Parameterize an SQL IN clause
...ed Aug 14 '15 at 20:25
Jean-François Savard
19.1k55 gold badges4040 silver badges6666 bronze badges
answered May 29 '09 at 23:18
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Should I use Vagrant or Docker for creating an isolated environment? [closed]
I use Ubuntu for development and deployment and have a need for creating an isolated environment.
10 Answers
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Why all the Active Record hate? [closed]
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@JoãoBragança - perhaps rather than a sarcastic comment, you could actually explain the difficulties that occur when one's data is sharded - so the rest of us can learn something :)
– Taryn East
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How does this giant regex work?
...n. The regex is /.*/, which basically means "match everything". The /e Modifier however eval()'s the code in the next parameter. In fact this is a way for someone to hide code. The following proof that this is a backdoor, and you must remove it immediately. Your system maybe compromised fu...