Question

我想知道如何根据javascript中的条件进行过滤。如果 min存在，amt > min，还有whole obj， remove that particular object in the obj


function getItem(obj){
  return
   obj.filter(e=>e.hasOwnProperty("min")?e.amt>e.min:e);

}
var obj1=[{
  "id": "name",
  "min": 300,
  "amt": 200,
  "cn" : "SG"
},{
  "id": "others",
  "amt": 200,
  "cn" : "TH"
},{
  "id": "others",
  "amt": 200,
  "cn" : "TH"
}]
var obj2=[{
  "id": "name",
  "min": 300,
  "amt": 500,
  "cn" : "SG"
},{
  "id": "others",
  "amt": 200,
  "cn" : "TH"
},{
  "id": "others",
  "amt": 200,
  "cn" : "TH"
}]

预期输出： var result = getItem（obj1）;

[{
  "id": "others",
  "amt": 200,
  "cn" : "TH"
},{
  "id": "others",
  "amt": 200,
  "cn" : "TH"
}]

var result = getItem（obj2）;

[{
  "id": "name",
  "min": 300,
  "amt": 500,
  "cn" : "SG"
},{
  "id": "others",
  "amt": 200,
  "cn" : "TH"
},{
  "id": "others",
  "amt": 200,
  "cn" : "TH"
}]

Answer 1

检查是否存在min，如果不返回，则检查对象是否大于amt。

var obj1 = [{
  "id": "name",
  "min": 300,
  "amt": 200,
  "cn": "SG"
}, {
  "id": "others",
  "amt": 200,
  "cn": "TH"
}, {
  "id": "others",
  "amt": 200,
  "cn": "TH"
}]
var obj2 = [{
  "id": "name",
  "min": 300,
  "amt": 500,
  "cn": "SG"
}, {
  "id": "others",
  "amt": 200,
  "cn": "TH"
}, {
  "id": "others",
  "amt": 200,
  "cn": "TH"
}];

const res1 = obj1.filter(({
  min,
  amt
}) => {
  return !min || (amt > min);
});

console.log(res1);

const res2 = obj2.filter(({
  min,
  amt
}) => {
  return !min || (amt > min);
});

console.log(res2);

Answer 2

如果我正确理解了您的问题，则仅当对象包含amt > min时，才希望应用条件min。如果对象不包含min，则返回整个对象。

在这种情况下，getItem应该看起来像这样：

const getItem = arrayOfObjects => arrayOfObjects.filter(obj => {
    if (obj['min']) {
        if (obj['amt'] > obj['min']) return true
    } else {
        return true
    }
})

Answer 3

这是我尝试过的一种解决方法

function getItem(obj) {
  
  return !('min' in obj) || obj.amt>obj.min ;
  
}
var obj1 = [{
  "id": "name",
  "min": 300,
  "amt": 200,
  "cn": "SG"
}, {
  "id": "others",
  "amt": 200,
  "cn": "TH"
}, {
  "id": "others",
  "amt": 200,
  "cn": "TH"
}]
var obj2 = [{
  "id": "name",
  "min": 300,
  "amt": 500,
  "cn": "SG"
}, {
  "id": "others",
  "amt": 200,
  "cn": "TH"
}, {
  "id": "others",
  "amt": 200,
  "cn": "TH"
}]

var result1 = obj1.filter(getItem);
var result2 = obj2.filter(getItem);
console.log('result1',result1);
console.log('result2',result2);

如何在JavaScript中获取嵌套数组对象

3 个答案: