ruby - 如何将长 ruby​​ 哈希分成多行？

Question

我有这个散列:

  arr={ [0,1]=>[0,0,1,1], [0,2]=>[0,1,0,1], [0,3]=>[0,1,1,0], [1,2]=>[1,0,0,1], [1,3] =>[1,0,1,0], [2,3] => [1,1,0,0] }

我想把它分成两行，因为它很长，有 121 个字符。我不是线长的标签，但我的指导线是 80，这比我喜欢的要长

所以我试过了

  arr={ [0,1] => [0,0,1,1], [0,2] => [0,1,0,1], [0,3] => [0,1,1,0] }
  arr.merge({[1,2] => [1,0,0,1], [1,3] => [1,0,1,0], [2,3] => [1,1,0,0]})

但是我的测试失败了，错误如下

undefined method `[]' for nil:NilClass

我怎样才能更好地分解它？一种选择是续行 \ 但这看起来不是特别整洁。

arr={ [0,1]=>[0,0,1,1], [0,2]=>[0,1,0,1], [0,3]=>[0,1,1,0], \
[1,2]=>[1,0,0,1], [1,3] =>[1,0,1,0], [2,3] => [1,1,0,0] }

虽然我想我可以做

arr={ [0,1]=>[0,0,1,1], [0,2]=>[0,1,0,1], [0,3]=>[0,1,1,0], \
      [1,2]=>[1,0,0,1], [1,3] =>[1,0,1,0], [2,3] => [1,1,0,0] }

但这看起来像是缩进的 whitespace 维护气味。

有没有更简洁的选择？

Answer 1

arr = {
  [0,1] => [0,0,1,1], [0,2] => [0,1,0,1], [0,3] => [0,1,1,0],
  [1,2] => [1,0,0,1], [1,3] => [1,0,1,0], [2,3] => [1,1,0,0]
}