randomRange

int count = 500000;
double a = 0;
double b = 0;

foreach(i; 1..count)
{
	randomRange([0.5, 0.5],
		{
			a++;
		},
		{
			b++;
		}
	); 
}
a = a/count;
b = b/count;
assert(abs(a-0.5) <= 0.01, text("randomRange не прошла статистический тест da = ", abs(a-0.5)));
assert(abs(b-0.5) <= 0.01, text("randomRange не прошла статистический тест db = ", abs(b-0.5)));