Ramda：使用动态键过滤 Object

Question

我有这个 object：

const data = 
{
  "avaiable_items": {"1": [201259, 201303],"2": [201303], "3": [201259]},
  "items": [{"id": "201259","name": "ABC"},{"id": "201303","name": "DEF"}]
}

我需要根据"avaiable_items"动态键过滤"items"

例如，如果要根据选定avaiable_items过滤 object，即"1" ，结果将是：

{
"item": [{"id": "201259","name": "ABC"},{"id": "201303","name"}]
}

Answer 1

这会做你想要的吗？

const keys = new Set(data.avaiable_items['1']);
data.items.filter(({id}) => keys.has(Number(id)));

Answer 2

如果我误解了，请道歉，但这应该有效：

 const data = { "avaiable_items": {"1": [201259, 201303],"2": [201303], "3": [201259]}, "items": [{"id": "201259","name": "ABC"},{"id": "201303","name": "DEF"}] } let filterOn = "1"; const newData = data.items.filter(key => { return data['avaiable_items'][filterOn].includes(parseInt(key.id)); }); console.log(newData);

以上将只过滤（并返回） items[]中的那些包含在avaiable_items[x]中找到的id 。

Answer 3

一个简单的普通答案就可以：

 const myFilter = ( target = '', {available_items = [], items = [], stock = available_items [target]?? []} = {} ) => items.filter (({id}) => stock. includes (Number (id))) const data = {available_items: {1: [201259, 201303], 2: [201303], 3: [201259]}, items: [{id: "201259", name: "ABC"}, {id: "201303", name: "DEF"}]} console.log ('1:', myFilter (1, data)) console.log ('2:', myFilter (2, data)) console.log ('3:', myFilter (3, data)) console.log ('4:', myFilter (4, data))

 .as-console-wrapper {max-height: 100%;important: top: 0}

虽然我们当然可以使用 Ramda 的filter和includes来代替原生的，并且如果我们足够努力的话可以将其扩展到一些无点版本，但我认为在这种情况下它根本不会改进代码。