Store specific keys and values into an array-CodePudding

I have a JSON data consists of many keys and values and I'm trying to extract some and not all keys and values. Here's my JSON data:

    "projectID": 1,
    "projectName": "XXX",
    "price": 0.2,
    "regStart":{
        "$date": "2021-12-15T16:00:00.00Z"
    },
    "regEnd":{
        "$date": "2021-12-18T16:00:00.00Z"
    },
    "saleStart":{
        "$date": "2021-12-20T20:00:00.00Z"
    },
    "saleEnd":{
        "$date": "2021-12-15T20:00:00.00Z"
    },
    "totalRaise": 200000,
    "totalSale": 50000,
    "projectStatus": "Ongoing",

Now I only wanna store projectID, projectName and price. How do I do that? I've written some but not sure how to iterate this data and store into my empty object.

    let result = []
    for(let i=0;i<data.length;i  ){
      let tempRes = {}
      // ...no idea how to do it
      result.push(tempRes);
    }

CodePudding user response：

const arr = {"projectID": 1,
    "projectName": "XXX",
    "price": 0.2,
    "regStart":{
        "$date": "2021-12-15T16:00:00.00Z"
    },
    "regEnd":{
        "$date": "2021-12-18T16:00:00.00Z"
    },
    "saleStart":{
        "$date": "2021-12-20T20:00:00.00Z"
    },
    "saleEnd":{
        "$date": "2021-12-15T20:00:00.00Z"
    },
    "totalRaise": 200000,
    "totalSale": 50000,
    "projectStatus": "Ongoing"}

const result = {};


    Object.keys(arr).forEach(key=>{
            if(['projectID','projectName','price'].includes(key)) {   // you can modify this as per your requirement
            result[key] = arr[key];
    }

});


console.log(result);

CodePudding user response：

You can access the property using dot notation. Here's an example:

var data = {
  "projectID": 1,
  "projectName": "XXX",
  "price": 0.2,
  "regStart": {
    "$date": "2021-12-15T16:00:00.00Z"
  },
  "regEnd": {
    "$date": "2021-12-18T16:00:00.00Z"
  },
  "saleStart": {
    "$date": "2021-12-20T20:00:00.00Z"
  },
  "saleEnd": {
    "$date": "2021-12-15T20:00:00.00Z"
  },
  "totalRaise": 200000,
  "totalSale": 50000,
  "projectStatus": "Ongoing"
}

var resultObj = {projectID: data.projectID, projectName: data.projectName, price: data.price}

console.log(resultObj)

CodePudding user response：

Here is a util function I wrote a while back.

const removeKeys = (obj, keys, associate = true) => {
  const _obj = associate ? obj : JSON.parse(JSON.stringify(obj))
  keys.forEach((key) => {
    if (Object.hasOwnProperty.call(_obj, key)) {
      delete _obj[key]
    }
  })

  return _obj
}

Usage for your case:

const payload = removeKeys(data, ['regStart', 'regEnd', 'saleStart', 'saleEnd', 'totalRaise', 'totalSale', 'projectStatus'], false)

Here it is in action: JSFiddle