Ramda 删除嵌套的 null 值

Question

我想从 object 中删除所有 null 值。 让我们假设：

const data = {
  key1: 'ok',
  key2: null,
  key3: '', // should be removed too
  key4: {
    inner_key1: 'aaa',
    inner_key2: null
  }
}

我做的是这个

const clean = R.reject(R.either(R.isNil, R.isEmpty))

而这项工作：

{"key1":"ok","key4":{"inner_key1":"aaa","inner_key2":null}}

如您所见，除了嵌套对象，inner_key2 存在，应该被过滤掉。

使用 ramda，我怎样才能删除这个嵌套值呢？

Answer 1

创建一个递归 function，它在清理 object 后迭代属性，并对每个属性调用 clean，即 object：

 const { pipe, reject, either, isNil, isEmpty, map, when, is } = R const clean = o => pipe( reject(either(isNil, isEmpty)), map(when(is(Object), clean)) )(o) const data = {"key1":"ok","key2":null,"key3":"","key4":{"inner_key1":"aaa","inner_key2":null}} const result = clean(data) console.log(result)

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