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How do Trigonometric functions work?
... a standard interval. For starters, you could reduce angles to be between 0 and 360 degrees. But by using a few identities, you realize you could get by with less. If you calculate sines and cosines for angles between 0 and 45 degrees, you can bootstrap your way to calculating all trig functions f...
How to use QueryPerformanceCounter?
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#include <windows.h>
double PCFreq = 0.0;
__int64 CounterStart = 0;
void StartCounter()
{
LARGE_INTEGER li;
if(!QueryPerformanceFrequency(&li))
cout << "QueryPerformanceFrequency failed!\n";
PCFreq = double(li.QuadPart)/1000.0;
Q...
C compile error: “Variable-sized object may not be initialized”
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Sorting Python list based on the length of the string
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205
When you pass a lambda to sort, you need to return an integer, not a boolean. So your code sho...
Breadth First Vs Depth First
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edited Feb 12 '12 at 21:05
answered Mar 26 '09 at 22:08
d...
Use a URL to link to a Google map with a marker on it
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In May 2017 Google launched the official Google Maps URLs documentation. The Google Maps URLs introduces universal cross-platform syntax that you can use in your applications.
Have a look at the following document:
https://develope...
android fragment onRestoreInstanceState
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204
Fragments do not have an onRestoreInstanceState method.
You can achieve the same result in onA...
What is the right way to POST multipart/form-data using curl?
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edited May 20 '15 at 18:35
evandrix
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mongodb find by multiple array items
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170
Depends on whether you're trying to find documents where words contains both elements (text and ...
In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
...he CharSequence, Collection, Map or Array object is not null and size > 0.
@NotBlank: The string is not null and the trimmed length is greater than zero.
To help you understand, let's look into how these constraints are defined and carried out (I'm using version 4.1):
The @NotNull constrain...