public CustomAreaCalculator(Func <IReadOnlyList <double>, double> formula, double[] arguments)
{
CheckArgument.NotNull(formula, nameof(formula));
CheckArgument.NotNull(arguments, nameof(arguments));
this.arguments = new double[arguments.Length];
Array.Copy(arguments, this.arguments, arguments.Length);
Formula = formula;
}
public static bool IsRectangular(this TriangleByThreeSides triangle)
{
CheckArgument.NotNull(triangle, nameof(triangle));
var squares =
new[] { triangle.A, triangle.B, triangle.C }
.Select(i => Math.Pow(i, 2))
.ToArray();
return(Enumerable.Range(0, squares.Length).Any(index => IsHypotenuse(index)));
bool IsHypotenuse(int index) =>
Math.Abs(squares[index] - squares.SkipAt(index).Sum()) < Tolerance.Epsilon;
}
public TriangleByThreeSides(double a, double b, double c)
{
CheckArgument.GreaterThanZero(a, nameof(a));
CheckArgument.GreaterThanZero(b, nameof(b));
CheckArgument.GreaterThanZero(c, nameof(c));
if (!IsTriangle(a, b, c))
{
throw new ArgumentException("The sum of the lengths of any two sides of a triangle is greater than the length of the third side.");
}
A = a;
B = b;
C = c;
}
public static IEnumerable <T> SkipAt <T>(this IEnumerable <T> collection, int index)
{
CheckArgument.NotNull(collection, nameof(collection));
return(collection.SkipAtImpl(index));
}
public CircleByRadius(double radius)
{
CheckArgument.GreaterThanZero(radius, nameof(radius));
Radius = radius;
}