js数组分批显示 数组分组

// 数组分批
againGroup(data, num) {
  var result = [];
  for (var i = 0, len = data.length; i < len; i += num) {
    result.push(data.slice(i, i + num));
  }
  return result;
}

例：

let arr = [1,2,34,5,6,7,6,79,10]
againGroup(arr, 3);