File: closure-02.typ

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// Pass closure as argument and return closure.
// Also uses shorthand syntax for a single argument.
#{
  let chain = (f, g) => (x) => f(g(x))
  let f = x => x + 1
  let g = x => 2 * x
  let h = chain(f, g)
  test(h(2), 5)
}