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Analyze audio using Fast Fourier Transform
...ly spaced frequencies, starting at 0. Because your sampling frequency is 44100 samples / sec. and the number of points in your FFT is 256, your frequency spacing is 44100 / 256 = 172 Hz (approximately)
The first coefficient in your array will be the 0 frequency coefficient. That is basically the av...
What does the “Just” syntax mean in Haskell?
...ance to be less than reserve - as is, you can borrow 101 from a balance of 100).
Other designs that deal with non-total functions:
throw exceptions upon checking input value does not fit the range
return a special value (primitive type): favourite choice is a negative value for integer functions ...
What really is a deque in STL?
...ircular buffer, nothing more. Assume you have a regular vector of capacity 1000 with 100 elements in it at positions 0 to 99. Now when a push_Front happens you just push at the end i.e. at position 999, then 998 etc. until the two ends meet. Then you reallocate (with exponential growth to guarantee ...
How can I create an executable JAR with dependencies using Maven?
...
+100
I blogged about some different ways to do this.
See Executable Jar with Apache Maven (WordPress)
or executable-jar-with-maven-exam...
MFC CListCtrl使用方法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ate column.
m_pList->InsertColumn (0, "Button Number", LVCFMT_LEFT, 100);
// Associate CImageList with CListCtrl.
m_pList->SetImageList (m_pImage, LVSIL_SMALL);
char szTemp[10];
for (int iCntr = 0; iCntr < 9; iCntr++)
{
wsprintf (szTemp, "%d", iC...
How to create a memory leak in Java?
...m) ClassLoader.
The class allocates a large chunk of memory (e.g. new byte[1000000]), stores a strong reference to it in a static field, and then stores a reference to itself in a ThreadLocal. Allocating the extra memory is optional (leaking the class instance is enough), but it will make the leak ...
How to append rows to an R data frame
...nsive insight than system.time:
library(microbenchmark)
microbenchmark(f1(1000), f3(1000), f4(1000), times = 5)
# Unit: milliseconds
# expr min lq median uq max neval
# f1(1000) 1024.539618 1029.693877 1045.972666 1055.25931 1112.769176 5
# f3(1000) ...
SQL NVARCHAR and VARCHAR Limits
...;`
Returns
-------------------- --------------------
8000 10000
Note that @A encountered truncation.
How to resolve the problem you are experiencing.
You are getting truncation either because you are concatenating two non max datatypes together or because you are concatenating a va...
Which is faster: Stack allocation or Heap allocation
...ack it would give you a Stack Overflow. Try for example in C++ this: int t[100000000]; Try for example t[10000000] = 10; and then cout << t[10000000]; It should give you a stack overflow or just won't work and won't show you anything. But if you allocate the array on the heap: int *t = new int...
Good or bad practice? Initializing objects in getter
...zy Initialization at http://msdn.microsoft.com/en-us/library/dd997286(v=vs.100).aspx. If you have older versions of .NET, you have to use the code pattern illustrated in the question. This code pattern has become so common that Microsoft saw fit to include a class in the latest .NET libraries to mak...