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- #!/usr/bin/ruby
- #
- ## https://rosettacode.org/wiki/Vector
- #
- class MyVector(:args) {
- has Number x
- has Number y
- method init {
- if ([:x, :y] ~~ args) {
- x = args{:x}
- y = args{:y}
- }
- elsif ([:length, :angle] ~~ args) {
- x = args{:length}*args{:angle}.cos
- y = args{:length}*args{:angle}.sin
- }
- elsif ([:from, :to] ~~ args) {
- x = args{:to}[0]-args{:from}[0]
- y = args{:to}[1]-args{:from}[1]
- }
- else {
- die "Invalid arguments: #{args}"
- }
- }
- method length { hypot(x, y) }
- method angle { atan2(y, x) }
- method +(MyVector v) { MyVector(x => x + v.x, y => y + v.y) }
- method -(MyVector v) { MyVector(x => x - v.x, y => y - v.y) }
- method *(Number n) { MyVector(x => x * n, y => y * n) }
- method /(Number n) { MyVector(x => x / n, y => y / n) }
- method neg { self * -1 }
- method to_s { "vec[#{x}, #{y}]" }
- }
- var u = MyVector(x => 3, y => 4)
- var v = MyVector(from => [1, 0], to => [2, 3])
- var w = MyVector(length => 1, angle => 45.deg2rad)
- say u #: vec[3, 4]
- say v #: vec[1, 3]
- say w #: vec[0.70710678118654752440084436210485, 0.70710678118654752440084436210485]
- say u.length #: 5
- say u.angle.rad2deg #: 53.13010235415597870314438744090659
- say u+v #: vec[4, 7]
- say u-v #: vec[2, 1]
- say -u #: vec[-3, -4]
- say u*10 #: vec[30, 40]
- say u/2 #: vec[1.5, 2]
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