javascript - 使用来自另一个数组的查询的多个条件过滤数组

Question

我有 2 个数组。一个包含这样的数据。

[{_id:123, Name: Mike, City: London},
{_id:456, Name: John, City: New York}]

另一个数组有这样的查询。

[{fieldName: Name, operator: ===, value: Mike, logicalOperator: ||},
{fieldName: City, operator: !==, value: London, logicalOperator: ||},]

我们如何用第二个数组过滤第一个数组。

有点像

data.filter(item => query.map(q => item.query.fieldName q.operator q.value)

Answer 1

您可以使用函数来表示比较操作:

[{
  fieldName: "Name",
  operator: (a, b) => a === b,
  value: "Mike", 
  logicalOperator: (a, b) => a || b,
}, {
  fieldName: "City",
  operator: (a, b) => a !== b, 
  value: "London", 
  logicalOperator: (a, b) => a || b
}]

那么就很简单了:

data.filter(item => query.reduce((acc, q) => q.locicalOperator(
   acc,
   q.operator(item[q.fieldName], q.value)
), true);