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Programming-Idioms

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  • Clojure

Idiom #36 First-class function : generic composition

Implement a function compose which returns composition function g ∘ f for any functions f and g having exactly 1 parameter.

(comp g f)

Function composition is already a function in Clojure's core API. It has no restriction on numbers of parameters.
template<typename Pred1, typename Pred2>
auto compose(Pred1 f, Pred2 g){
  return [f,g](auto x){ return g(f(x)); };	
}

New implementation...
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