All files array.js

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export function range(start, stop, step = 1) {
  start = isNaN(+start) ? 0 : +start;
  stop = isNaN(+stop) ? 0 : +stop;
  step = isNaN(+step) ? 1 : +step;
 
  // 保证step正确
  if (start > stop && step > 0) {
    step = -step;
  }
 
  const arr = [];
  for (let i = start; start > stop ? i > stop : i < stop; i += step) {
    arr.push(i);
  }
 
  return arr;
}