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Moritz Schauer
Moritz Schauer
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Julia, 2321

f(x)=-x.(1-2)//abs(x.(1>x>-1))/2x

Then

julia> f(f(12//1)) -12//1

p//q is julia's literal notation of rational numbers and .(1) and .(2) are short-cuts to obtain numerator and denominator. This works because Rationals are normalized with sign in the numerator.

Julia, 23

f(x)=-x.(2)//abs(x.(1))

Then

julia> f(f(12//1)) -12//1

p//q is julia's literal notation of rational numbers and .(1) and .(2) are short-cuts to obtain numerator and denominator. This works because Rationals are normalized with sign in the numerator.

Julia, 21

f(x)=(1-2(1>x>-1))/2x

Then

julia> f(f(12//1)) -12//1

p//q is julia's literal notation of rational numbers.

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Moritz Schauer
Moritz Schauer
  • 1.8k
  • 12
  • 19

Julia, 23

f(x)=-x.(2)//abs(x.(1))

Then

julia> f(f(12//1)) -12//1

p//q is julia's literal notation of rational numbers and .(1) and .(2) are short-cuts to obtain numerator and denominator. This works because Rationals are normalized with sign in the numerator.