How do I write a loop to include an object with string value if the object doesn't exist?-CodePudding

I have an array of objects as show below, I'm going to filter out the objects and add into another object of objects (the reason is that I will be storing it into firestore and it only accepts non-arrays) so I'm just going to keep things indexed with numbers but how do I automatically add an object into the list of objects if the object name is not there? (Default object with a value in string)

let data = [ {name: Cat, choice: one, Date: 11/11/22, Time: 503, food: chicken}, {name: Dog, Date: 11/11/22, Time: 802, food: veggies}, {name: Cat, choice: two, Date: 11/11/22, Time: 105, food: beef} ]

for(let i = 0; i<data.length-1; i  ) {
    let savingData = [] 
    if(data[i].choice == "undefined" || "null") {
        data[i].choice = "zero";
    }
    savingData.push({
        name: data[i].name
        choice: data[i].choice //missing choices will default to zero as  string
        food: data[i].food
    });
}

for(let j = 0; j<savingData.length-1; j  ) {
    let objectSavingData = Object.assign({}, savingData[j]);
}

Does not work - did I miss something? or maybe the error is not in this portion of code.. (data structure changed due to its lengthyness, data has arrays of 150 and object names of over 40, I just simplified it to this but all the data entry are in string)

CodePudding user response：

You should use map function to archive it.

Also use Destructuring & default value.

Here is a snipecode.

const data = [
  { name: "Cat", choice: "one", Date: "11/11/22", Time: 503, food: "chicken" },
  { name: "Dog", Date: "11/11/22", Time: 802, food: "veggies" },
  { name: "Cat", choice: "two", Date: "11/11/22", Time: 105, food: "beef" }
]

const savingData = data.map((record) => {
  const { name, choice = 0, Date: date, Time: time, food } = record;
  return { name, choice, date, time, food };
});

console.log(savingData);

CodePudding user response：

`let savingData = [] ;` >>> this need to be declared before 'for loop';
`i<data.length-1; >>> i<data.length`
`let objectSavingData = Object.assign({}, savingData[j]);` - you are 
  assigning new object to objectSavingData...also object.assing just 
  merge/overwrite properties.this will not work