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Import JSON

 const pluckDeep = (key) => (obj) => key.split('.').reduce((acc, k) => acc[k], obj);​
 ​
 const compose = (...fns) => (res) => fns.reduce((acc, fn) => fn(acc), res);​
 ​
 const unfold = (f, seed) => {​
   const go = (f, seed, acc) => {​
     const res = f(seed);​
     return res ? go(f, res[1], acc.concat([res[0]])) : acc;​
   };​
   return go(f, seed, []);​
 };​
const pluckDeep = (key) => (obj) => key.split('.').reduce((acc, k) => acc[k], obj);

const compose = (...fns) => (res) => fns.reduce((acc, fn) => fn(acc), res);

const unfold = (f, seed) => {
  const go = (f, seed, acc) => {
    const res = f(seed);
    return res ? go(f, res[1], acc.concat([res[0]])) : acc;
  };
  return go(f, seed, []);
};

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