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Random float number generation
How do I generate random floats in C++?
14 Answers
14
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For each row in an R dataframe
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Be careful, as the dataframe is converted to a matrix, and what you end up with (x) is a vector. This is why the above example has to use numeric indexes; the by() approach gives you a data.frame, which makes your code more robust.
– D...
C++, What does the colon after a constructor mean? [duplicate]
...e the body of the constructor executes.
For case #1, I assume you understand inheritance (if that's not the case, let me know in the comments). So you are simply calling the constructor of your base class.
For case #2, the question may be asked: "Why not just initialise it in the body of the cons...
Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...returning an Integer object, which may have its values cached between -128 and 127. This is why the first value returns true - it's cached - and the second value returns false - 128 isn't a cached value, so you're getting two separate Integer instances.
It is important to note that you are compari...
Creating your own header file in C
... that this code doesn't work if you try to just build it by button ("build and run" in Code::Blocks for example). It might seem obvious for you but for me it's the first time it has happened and it took me quite some time to figure out where is the problem.
– Jeyekomon
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How can I get the line number which threw exception?
...ways returns 0 for me. Is this caused by not having a pdb file? What is it and how to get it? (I am using ASP.net)
– Brabbeldas
Sep 27 '13 at 9:58
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KeyValuePair VS DictionaryEntry
What is the difference between KeyValuePair which is the generic version and DictionaryEntry?
2 Answers
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'printf' vs. 'cout' in C++
What is the difference between printf() and cout in C++?
16 Answers
16
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Simple example of threading in C++
...sk1 says: " << msg;
}
int main()
{
// Constructs the new thread and runs it. Does not block execution.
thread t1(task1, "Hello");
// Do other things...
// Makes the main thread wait for the new thread to finish execution, therefore blocks its own execution.
t1.join();
}
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Scala how can I count the number of occurrences in a list
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I had the same problem as Sharath Prabhal, and I got another (to me clearer) solution :
val s = Seq("apple", "oranges", "apple", "banana", "apple", "oranges", "oranges")
s.groupBy(l => l).map(t => (t._1, t._2.length))
With as result :
Map(banana -> 1, ora...