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Meaning of epsilon argument of assertEquals for double values
... numbers. With this delta value you can control the evaluation of equality based on a error factor.
Also some floating-point values can have special values like NAN and -Infinity/+Infinity which can influence results.
If you really intend to compare that two doubles are exactly equal it is best c...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
...efine __CHAR_BIT__ 8
#define __UINT8_MAX__ 255
#define __WINT_MAX__ 2147483647
#define __ORDER_LITTLE_ENDIAN__ 1234
#define __SIZE_MAX__ 18446744073709551615UL
#define __WCHAR_MAX__ 2147483647
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
#define __GCC_HAV...
What is the argument for printf that formats a long?
...
647
Put an l (lowercased letter L) directly before the specifier.
unsigned long n;
long m;
pri...
How to install Java SDK on CentOS?
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164
The following command will return a list of all packages directly related to Java. They will be...
How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
...t it's unlikely to be universally-applicable. I have a bunch of other Java-based software tat I run as well like Eclipse, JasperReports iReport, etc. that are all likely to be affected by this. I think I'd rather just move the JDK1.8 directory somewhere else and use that explicitly with JAVA_HOME fo...
Why do x86-64 systems have only a 48 bit virtual address space?
...facturers took a shortcut. They use an instruction set which allows a full 64-bit address space, but current CPUs just only use the lower 48 bits. The alternative was wasting transistors on handling a bigger address space which wasn't going to be needed for many years.
So once we get near the 48-bi...
Abstract Class vs Interface in C++ [duplicate]
...ve body" - there is no can, pure virtual by definition have no body in the base class and they must have a body in the derived class. Also, you do not require the virtual keyword for multiple inheritance in C++. In fact, good design that uses multiple inheritance avoids the virtual keyword (well, th...
Android Studio installation on Windows 7 fails, no JDK found
...
+1 This MOSTLY worked for me. I am running 64 bit windows and JDK 1.7.0. I tried adding both JDK_HOME and JAVA_HOME with "c:\Program Files\Java\jdk1.7.0\". It still would not load. However, I capitalized the "C" and removed the trailing slash and it works now: "C:\Pr...
Is there a way to detect if an image is blurry?
...ding off of Nike's answer. Its straightforward to implement the laplacian based method with opencv:
short GetSharpness(char* data, unsigned int width, unsigned int height)
{
// assumes that your image is already in planner yuv or 8 bit greyscale
IplImage* in = cvCreateImage(cvSize(width,he...
JavaScript % (modulo) gives a negative result for negative numbers
According to Google Calculator (-13) % 64 is 51 .
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