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How to use the PI constant in C++
...h.h (2014) it is defined as:
# define M_PI 3.14159265358979323846 /* pi */
but check your math.h for more. An extract from the "old" math.h (in 2009):
/* Define _USE_MATH_DEFINES before including math.h to expose these macro
* definitions for common math constants. These are placed...
Android emulator-5554 offline
...0 127.0.0.1:5554 0.0.0.0:* LISTEN 4848/emulator64-x86
tcp 0 0 127.0.0.1:5555 0.0.0.0:* LISTEN 4848/emulator64-x86
This tells me that the process id 4848 (yours will likely be different) is still listening on port 5554. You can no...
If unit testing is so great, why aren't more companies doing it? [closed]
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1) It's hard
2) It takes time
3) It's very hard to determine the value of test code
Point 3 is...
How do I install Python OpenCV through Conda?
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This worked fine with Anaconda 2.7 on Win10 64bit, whereas conda install opencv did not.
– Anton Schwaighofer
Apr 18 '16 at 12:34
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What's the strangest corner case you've seen in C# or .NET? [closed]
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Answer:
On 32-bit JIT it should result in a StackOverflowException
On 64-bit JIT it should print all the numbers to int.MaxValue
This is because the 64-bit JIT compiler applies tail call optimisation, whereas the 32-bit JIT does not.
Unfortunately I haven't got a 64-bit machine to hand to v...
What is size_t in C?
... one implementation defines it as such doesn't mean all do. Case in point: 64-bit Windows. unsigned long is 32-bit, size_t is 64-bit.
– Tim Čas
Dec 28 '14 at 21:40
2
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Peak detection in a 2D array
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CakeMasterCakeMaster
1,58733 gold badges1313 silver badges1515 bronze badges
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Why does a RegExp with global flag give wrong results?
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87
This is like Hitchhiker's Guide to the Galaxy API design here. "That pitfall that you fell in has been perfectly documented in the spec fo...
How can I pad an int with leading zeros when using cout
...((x)&0x0F)>9)?((x)+'A'-10):((x)+'0'))
typedef signed long long Int64;
// Special printf for numbers only
// See formatting information below.
//
// Print the number "n" in the given "base"
// using exactly "numDigits".
// Print +/- if signed flag "isSigned" is TRUE.
// Use the ...
Compression/Decompression string with C#
...], while Unzip returns a string. If you want a string from Zip you can Base64 encode it (for example by using Convert.ToBase64String(r1)) (the result of Zip is VERY binary! It isn't something you can print to the screen or write directly in an XML)
The version suggested is for .NET 2.0, for .NET 4....