Inserting items into an array entity

Question

Inserting items into an array entity

I am attempting to insert objects into an existing array only if a certain condition is met.

Let me share the code snippet with you:

RequestObj = [{
    "parent1": {
        "ob1": value,
        "ob2": {
            "key1": value,
            "key2": value
        },
    },
},
{
    "parent2": {
        "ob1": value,
        "ob2":{
            "key1":value,
            "key2": value
        }
    }
}]

In this scenario, I need to include another object in the RequestObj array based on certain conditions. While I am familiar with using RequestObj.push(), I am unsure how to add it within the parent1 object.

if (key3 !== null) {
    // Include the following object inside parent1 object
    "ob3": {
        "key1": value,
        "key2": value
    }
}

Despite my efforts, I have not been able to come up with a solution for this issue. Your assistance would be greatly appreciated.

javascript jquery angular typescript

Answer 1

Answer №1

One method to add an element to an array is by using the push function.

// Create a new object
var newObject = {
    "ob3": {
        "key1": value,
        "key2": value
    }
};
// Add the new object to the array
RequestObj.push(newObject);

You can also directly push an object into the array without declaring a variable first:

// Add new object to array
RequestObj.push({
    "ob3": {
        "key1": value,
        "key2": value
    }
});

UPDATE

If you are not just pushing into the array but adding a new property to an object inside the array, you must be aware of the position of the element within the array (such as RequestObj[0] for the first element).

Then, within that element, you have to add a new property to the parent1 object (RequestObj[0].parent1):

RequestObj[0].parent1.ob3 = {
      "key1": "A",
      "key2": "B"
 };

var RequestObj = [{
  "parent1": {
    "ob1": "A",
    "ob2": {
      "key1": "B",
      "key2": "C"
    },
  },
  "parent2": {
    "ob1": "D",
    "ob2": {
      "key1": "E",
      "key2": "F"
    }
  }
}];

var key3 = 'somethingNotNull';

if (key3 !== null) {
  RequestObj[0].parent1.ob3 = {
      "key1": "A",
      "key2": "B"
  };
}
console.log(RequestObj);

Answer 2

One method to add an element to an array is by using the push function.

// Create a new object
var newObject = {
    "ob3": {
        "key1": value,
        "key2": value
    }
};
// Add the new object to the array
RequestObj.push(newObject);

You can also directly push an object into the array without declaring a variable first:

// Add new object to array
RequestObj.push({
    "ob3": {
        "key1": value,
        "key2": value
    }
});

UPDATE

If you are not just pushing into the array but adding a new property to an object inside the array, you must be aware of the position of the element within the array (such as RequestObj[0] for the first element).

Then, within that element, you have to add a new property to the parent1 object (RequestObj[0].parent1):

RequestObj[0].parent1.ob3 = {
      "key1": "A",
      "key2": "B"
 };

var RequestObj = [{
  "parent1": {
    "ob1": "A",
    "ob2": {
      "key1": "B",
      "key2": "C"
    },
  },
  "parent2": {
    "ob1": "D",
    "ob2": {
      "key1": "E",
      "key2": "F"
    }
  }
}];

var key3 = 'somethingNotNull';

if (key3 !== null) {
  RequestObj[0].parent1.ob3 = {
      "key1": "A",
      "key2": "B"
  };
}
console.log(RequestObj);

Answer 3

Answer №2

To search for the object with key parent1 in the loop using RequestObj, you need to iterate through it.

You can achieve this by utilizing the .filter method as shown below:

for(let i = 0; i < RequestObj.length; i++) {
   let found_object = RequestObj[i].filter(function (r) {
      return r === 'parent1'
   });
}

After finding the object, you can then perform operations on found_object.

Answer 4

To search for the object with key parent1 in the loop using RequestObj, you need to iterate through it.

You can achieve this by utilizing the .filter method as shown below:

for(let i = 0; i < RequestObj.length; i++) {
   let found_object = RequestObj[i].filter(function (r) {
      return r === 'parent1'
   });
}

After finding the object, you can then perform operations on found_object.

Inserting items into an array entity

Answer №1

Answer №2

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