无法从对象数组中获取空白属性及其 id答案

【问题标题】：Unable to get blank properties and it's id from array of object无法从对象数组中获取空白属性及其 id
【发布时间】：2022-08-16 21:41:38
【问题描述】：

我想获得空属性（只需要检查角色、组和子组），它的 id 都在对象数组中。

let tempdata = [
        {
            \"id\": 41,
            \"tool\": \"Artifactory\",
            \"role\": \"\",
            \"group\": \"Dish\",
            \"subgroup\": \"Ehub test 009\",
            \"subscriptionId\": \"artifactory-ehub-test-009\"
        },
        {
            \"id\": 4,
            \"tool\": \"Gitlab\",
            \"role\": \"Owner\",
            \"group\": \"IDP\",
            \"subgroup\": \"IDP-Service-Templates\",
            \"subscriptionId\": \"gitlab-51663585\"
        }
    ]

到目前为止我尝试的是：

tempdata.filter(item=>item.group==\'\' || item.subgroup==\'\' || item.role==\'\').map(item=>item.id)

但这只会给我的 id [41] 我想要的是 [{\"id\":41,\"blank_properties\":[\"role\"]}] 有人可以帮忙吗？

标签： javascript arrays

【解决方案1】：

你可以简单地这样做

tempdata.map((item)=>{
    let d = [];
     if(item.role === ''){
    d.push('role')
     }
    if(item.group ===''){
        d.push('group')
    }
    if(item.subgroup===''){
        d.push('subgroup')
    }
    return {...item,'blank_prop':d}
})

【讨论】：

【解决方案2】：

tempdata.filter(item=>item.group=='' || item.subgroup=='' || 
item.role=='').map(item=>{
let temp=[];
if(item.group==='')temp.push('group')
if(item.role==='')temp.push('role')
if(item.subgroup==='')temp.push('subgroup')
if(item.subscriptionId==='')temp.push('subscriptionId')
if(item.tool==='')temp.push('tool')
return {id:item.id,blank_property:temp};})

【讨论】：

【解决方案3】：

如果您对解决此问题的其他方法感兴趣，我将提出一个更复杂的解决方案：

let tempData = 
[
    {
        "id": 41,
        "tool": "Artifactory",
        "role": "",
        "group": "Dish",
        "subgroup": "Ehub test 009",
        "subscriptionId": "artifactory-ehub-test-009"
    },
    {
        "id": 4,
        "tool": "Gitlab",
        "role": "Owner",
        "group": "IDP",
        "subgroup": "IDP-Service-Templates",
        "subscriptionId": "gitlab-51663585"
    },
];

// An array of all properties you want to check for blank strings
const propertiesToCheck = [ "group", "subgroup", "role" ];

result = tempData
    .filter((item) =>
    {
        // Your original code was filtering the array of objects to
        //  JUST ones that have at least one of those properties set to ""
        //  So this filter does the same thing.
        //
        // If you DON'T actually want to outright remove ones that don't match this condition,
        //  then you can just remove this entire filter step.

        // Iterate object keys and values
        for (const [ key, value ] of Object.entries(item))
        {
            // If the key is not in the above array of propertiesToCheck,
            //  then skip it
            if (propertiesToCheck.indexOf(key) == -1)
            {
                continue;
            }

            // If we encounter one of those properties and it's blank, return true
            if (value == "")
            {
                return true;
            }
        }

        // Return false if we get through all of the properties without encountering one that's blank
        return false;
    })
    .map((item) =>
    {
        // Create an object to house the result in the manner you described
        const result =
        {
            id: item.id,
            blank_properties: [],
        };

        // Iterate the object keys and values again
        for (const [ key, value ] of Object.entries(item))
        {
            // Same deal as before
            if (propertiesToCheck.indexOf(key) == -1)
            {
                continue;
            }

            // Then, if the value is blank...
            if (value == "")
            {
                // ...push it's key to the blank_properties array
                result.blank_properties.push(key);
            }
        }

        // Return the result!
        return result;
    });

// Prints: 
//  [ { id: 41, blank_properties: [ 'role' ] } ]
console.log(result);

【讨论】：