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struct Foo(x:Int, y:Int)
func len(f:Foo->Num)
return Num.sqrt(Num(f.x*f.x + f.y*f.y))!
func main()
>> 3 _min_ 5
= 3
>> 5 _min_ 3
= 3
>> Foo(5, 1) _min_ Foo(5, 999)
= Foo(x=5, y=1)
>> Foo(5, 999) _min_.x Foo(5, 1)
= Foo(x=5, y=999)
>> Foo(999, 1) _min_.y Foo(1, 10)
= Foo(x=999, y=1)
>> Foo(-999, -999) _max_.len() Foo(10, 10)
= Foo(x=-999, y=-999)
>> foos := [Foo(5, 1), Foo(5, 99), Foo(-999, -999)]
>> (_max_: foos)!
= Foo(x=5, y=99)
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