Ramda 删除嵌套的空值

Question

我想从对象中删除所有空值。我们假设：

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

我所做的是这个

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

还有这个作品：

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

正如您所看到的，除了嵌套对象之外，inner_key2 也存在，并且应该被过滤掉。

使用 ramda，我怎样才能删除这个嵌套值？

Answer 1

创建一个递归函数，在清理对象后迭代属性，并对每个属性（即一个对象）调用 clean：

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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