Initial data commit

Task/Vector/Swift/vector.swift

@@ -0,0 +1,55 @@
+import Foundation
+#if canImport(Numerics)
+import Numerics
+#endif
+
+struct Vector<T: Numeric> {
+  var x: T
+  var y: T
+
+  func prettyPrinted(precision: Int = 4) -> String where T: CVarArg & FloatingPoint {
+    return String(format: "[%.\(precision)f, %.\(precision)f]", x, y)
+  }
+
+  static func +(lhs: Vector, rhs: Vector) -> Vector {
+    return Vector(x: lhs.x + rhs.x, y: lhs.y + rhs.y)
+  }
+
+  static func -(lhs: Vector, rhs: Vector) -> Vector {
+    return Vector(x: lhs.x - rhs.x, y: lhs.y - rhs.y)
+  }
+
+  static func *(lhs: Vector, scalar: T) -> Vector {
+    return Vector(x: lhs.x * scalar, y: lhs.y * scalar)
+  }
+
+  static func /(lhs: Vector, scalar: T) -> Vector where T: FloatingPoint {
+    return Vector(x: lhs.x / scalar, y: lhs.y / scalar)
+  }
+
+  static func /(lhs: Vector, scalar: T) -> Vector where T: BinaryInteger {
+    return Vector(x: lhs.x / scalar, y: lhs.y / scalar)
+  }
+}
+
+#if canImport(Numerics)
+extension Vector where T: ElementaryFunctions {
+  static func fromPolar(radians: T, theta: T) -> Vector {
+    return Vector(x: radians * T.cos(theta), y: radians * T.sin(theta))
+  }
+}
+#else
+extension Vector where T == Double {
+  static func fromPolar(radians: Double, theta: Double) -> Vector {
+    return Vector(x: radians * cos(theta), y: radians * sin(theta))
+  }
+}
+#endif
+
+print(Vector(x: 4, y: 5))
+print(Vector.fromPolar(radians: 3.0, theta: .pi / 3).prettyPrinted())
+print((Vector(x: 2, y: 3) + Vector(x: 4, y: 6)))
+print((Vector(x: 5.6, y: 1.3) - Vector(x: 4.2, y: 6.1)).prettyPrinted())
+print((Vector(x: 3.0, y: 4.2) * 2.3).prettyPrinted())
+print((Vector(x: 3.0, y: 4.2) / 2.3).prettyPrinted())
+print(Vector(x: 3, y: 4) / 2)