June 2018 Update

Task/Compound-data-type/Elena/compound-data-type.elena

@@ -0,0 +1,12 @@
+struct Point
+{
+    int prop x :: _x.
+
+    int prop y :: _y.
+
+    constructor new(IntNumber x, IntNumber y)
+    [
+        _x := x.
+        _y := y.
+    ]
+}

Task/Compound-data-type/Julia/compound-data-type-1.julia

@@ -1,4 +1,4 @@
-type Point{T<:Real}
+struct Point{T<:Real}
     x::T
     y::T
 end

Task/Compound-data-type/Julia/compound-data-type-2.julia

@@ -1,4 +1,4 @@
-==(u::Point, v::Point) = (u.x == v.x) & (u.y == v.y)
--(u::Point) = Point(-u.x, -u.y)
-+(u::Point, v::Point) = Point(u.x + v.x, u.y + v.y)
--(u::Point, v::Point) = Point(u.x - v.x, u.y - v.y)
+Base.:(==)(u::Point, v::Point) = u.x == v.x && u.y == v.y
+Base.:-(u::Point) = Point(-u.x, -u.y)
+Base.:+(u::Point, v::Point) = Point(u.x + v.x, u.y + v.y)
+Base.:-(u::Point, v::Point) = u + (-v)

Task/Compound-data-type/Julia/compound-data-type-3.julia

@@ -1,14 +1,8 @@
-a = Point(1, 2)
-b = Point(3, 7)
-c = Point(2, 4)
-
-println("a = ", a)
-println("b = ", b)
-println("c = ", c)
-
-println("a + b =     ", a+b)
-println("-a + b =    ", -a+b)
-println("a - b =     ", a-b)
-println("a + b + c = ", a+b+c)
-println("a == c      ", a == c)
-println("a + a == c  ", a + a == c)
+a, b, c = Point(1, 2), Point(3, 7), Point(2, 4)
+@show a b c
+@show a + b
+@show -a + b
+@show a - b
+@show a + b + c
+@show a == b
+@show a + a == c

Task/Compound-data-type/Scala/compound-data-type.scala

@@ -1,4 +1,4 @@
-case class Point(x:Int=0, y:Int=0)
+case class Point(x: Int = 0, y: Int = 0)
 
-val p=Point(1,2)
+val p = Point(1, 2)
 println(p.y)   //=> 2