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export function aperture(step, list){  if (arguments.length === 1){    return _list => aperture(step, _list)  }  if (step > list.length) return []  let idx = 0  const limit = list.length - (step - 1)  const acc = new Array(limit)  while (idx < limit){    acc[ idx ] = list.slice(idx, idx + step)    idx += 1  }
  return acc}