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Idiom #281 Use a Point as a map key

You have a Point with integer coordinates x and y. Create a map m with key type Point (or equivalent) and value type string. Insert "Hello" at position (42, 5).

m := map[Point]string{}
p := Point{x: 42, y: 5}
m[p] = "Hello"
m = dict()
p = Point(x=42, y=5)
m[p] = 'Hello'
Point = Struct.new(:x, :y)
m = {Point.new(42, 5) => "Hello"}

New implementation...