Combining two array objects in JavaScript to create a single array object and iterating through each index or object

Question

Combining two array objects in JavaScript to create a single array object and iterating through each index or object

let objectArray1 = [{key1: 1}, {key2: 2}, {key3: 3}];

let objectArray2 = [{operator: LESS THAN}, {operator: GREATER THAN}, {operator: NOT EQUAL}];

In this scenario, the goal is to combine each object in objectArray2 with the corresponding object in objectArray1. For example, merge object at index 0 in objectArray2 into the object at index 0 in objectArray1 and so on.

//result = [{key1: 1, operator: LESS THAN}, {key2: 2, operator: GREATER THAN}];

During or after merging, it is required to iterate through each resulting object and create a new object with properties (field, input, operator) which are then pushed into an array.

field = key from objectArray1 (key1, key2, key3)
input = value from objectArray1 (1, 2, 3)
operator = "operator" from objectArray2

// let endResult = [{field: key1, input: 1, operator: LESS THAN}, {field: key2, input: 2, operator: GREATER THAN}];

Thank you!

javascript arrays

Answer 1

Answer №1

It appears this code accomplishes your desired outcome by assuming familiarity with the data and bypassing error checks, simply merging them as requested.

const arrayOne = [{a:1},{b:2}, {c:3}];

const arrayTwo = [{operator: "LESS THAN"}, {operator:"GREATER THAN"}, {operator:"NOT EQUAL"}];

let finalResult = [];
let counter = 0;
let newObj = {};

arrayOne.forEach(function(fieldInput){
    for (field in fieldInput) {
        newObj.field = field;
        newObj.input = fieldInput[field];
        newObj.operator = arrayTwo[counter]['operator'];
        counter++;
        finalResult.push(newObj);
        newObj = {};
    };
})

// finalResult = [{field:a, input:1, operator: LESS THAN}, {field:b, input:2, operator: GREATER THAN}, {field:c, input:3, operator: NOT EQUAL}]

Answer 2

It appears this code accomplishes your desired outcome by assuming familiarity with the data and bypassing error checks, simply merging them as requested.

const arrayOne = [{a:1},{b:2}, {c:3}];

const arrayTwo = [{operator: "LESS THAN"}, {operator:"GREATER THAN"}, {operator:"NOT EQUAL"}];

let finalResult = [];
let counter = 0;
let newObj = {};

arrayOne.forEach(function(fieldInput){
    for (field in fieldInput) {
        newObj.field = field;
        newObj.input = fieldInput[field];
        newObj.operator = arrayTwo[counter]['operator'];
        counter++;
        finalResult.push(newObj);
        newObj = {};
    };
})

// finalResult = [{field:a, input:1, operator: LESS THAN}, {field:b, input:2, operator: GREATER THAN}, {field:c, input:3, operator: NOT EQUAL}]

Answer 3

Answer №2

Breaking down this issue into two main steps will make it easier to tackle: 1) Combining objects 2) Processing the combined objects

A versatile function for merging can be written as follows:

if (!Object.prototype.combine) {

      Object.prototype.combine = function (object) {

        for (key in object) {

          if (typeof object[key] === 'object' && 
              typeof this[key]   === 'object' && 
              this.hasOwnProperty(key)) {

            this[key].combine(object[key]);      

          } else {      
            this[key] = object[key];      
          }

        }    

        return this;  
      };
};

The above code snippet establishes a method that is shared among all Objects. Its functionality is illustrated here:

var obj1 = { 'a': 7 },
    obj2 = { 'b': 2 };

obj1.combine(obj2);

console.log(obj1); // { 'a': 7, 'b': 2 };

In general practice, directly modifying Objects like with the .combine method may not be recommended, but creating a similar feature with a different API should be straightforward. For instance, one could design a function called extend (obj1, obj2) { carry out necessary operations.. and yield an extended object }

To address the merging aspect, utilizing a loop to traverse the merged object and populate an array with new objects is key. A basic implementation might resemble the following:

for (var prop in mergedObject) {
  var tempObject = {};
  if (prop === 'operator') {
    tempObject.operator = mergedObject.operator;
  } else {
    tempObject.field = prop;
    tempObject.input = tempObject[prop];
  }
  endResult.push(tempObject);
}

This guideline should assist you in resolving the merging and processing of objects efficiently.

Answer 4

Breaking down this issue into two main steps will make it easier to tackle: 1) Combining objects 2) Processing the combined objects

A versatile function for merging can be written as follows:

if (!Object.prototype.combine) {

      Object.prototype.combine = function (object) {

        for (key in object) {

          if (typeof object[key] === 'object' && 
              typeof this[key]   === 'object' && 
              this.hasOwnProperty(key)) {

            this[key].combine(object[key]);      

          } else {      
            this[key] = object[key];      
          }

        }    

        return this;  
      };
};

The above code snippet establishes a method that is shared among all Objects. Its functionality is illustrated here:

var obj1 = { 'a': 7 },
    obj2 = { 'b': 2 };

obj1.combine(obj2);

console.log(obj1); // { 'a': 7, 'b': 2 };

In general practice, directly modifying Objects like with the .combine method may not be recommended, but creating a similar feature with a different API should be straightforward. For instance, one could design a function called extend (obj1, obj2) { carry out necessary operations.. and yield an extended object }

To address the merging aspect, utilizing a loop to traverse the merged object and populate an array with new objects is key. A basic implementation might resemble the following:

for (var prop in mergedObject) {
  var tempObject = {};
  if (prop === 'operator') {
    tempObject.operator = mergedObject.operator;
  } else {
    tempObject.field = prop;
    tempObject.input = tempObject[prop];
  }
  endResult.push(tempObject);
}

This guideline should assist you in resolving the merging and processing of objects efficiently.

Combining two array objects in JavaScript to create a single array object and iterating through each index or object

Answer №1

Answer №2

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