Combining two arrays in Javascript: A step-by-step guide

Question

Combining two arrays in Javascript: A step-by-step guide

I've been attempting to merge multiple arrays into one unified array using Javascript, but it seems that my current method is not quite up to par. Consider the following three arrays:

var array_1 = [{"a" : 1, "b" : 2, "c" : 3}];
var array_2 = [{"d" : 4, "e" : 5, "f" : 6}];
var array_3 = new Array();

My goal is to combine array_1, followed by array_2, into array_3. Meaning, I'd like array_1 to be fully merged first and then array_2, resulting in the following structure:

{"a" : 1, "b" = 2, "c" = 3"}
{"d" : 4, "e" = 5, "f" = 6"}

If anyone could lend a hand with this coding challenge, it would be greatly appreciated.

javascript arrays object

Answer 1

Answer №1

let combinedArray = array1.concat(array2);

Answer 2

let combinedArray = array1.concat(array2);

Answer 3

Answer №2

Your array structure is quite unique and not conventional. You have arrays with one element each, containing an Object with 3 properties. The output you provided isn't valid JavaScript or JSON syntax, but I can help you achieve what you're aiming for.

var firstArray = [{"a": 1, "b": 2, "c": 3}];
var secondArray = [{"d": 4, "e": 5, "f": 6}];
var mergedArray = new Array();

function mergeObjects(obj1, obj2) {
    var newObj = {};
    for (var key in obj1) { newObj[key] = obj1[key]; }
    for (var key in obj2) { newObj[key] = obj2[key]; }
    return newObj;
}

mergedArray[0] = mergeObjects(firstArray[0], secondArray[0]);

Answer 4

Your array structure is quite unique and not conventional. You have arrays with one element each, containing an Object with 3 properties. The output you provided isn't valid JavaScript or JSON syntax, but I can help you achieve what you're aiming for.

var firstArray = [{"a": 1, "b": 2, "c": 3}];
var secondArray = [{"d": 4, "e": 5, "f": 6}];
var mergedArray = new Array();

function mergeObjects(obj1, obj2) {
    var newObj = {};
    for (var key in obj1) { newObj[key] = obj1[key]; }
    for (var key in obj2) { newObj[key] = obj2[key]; }
    return newObj;
}

mergedArray[0] = mergeObjects(firstArray[0], secondArray[0]);

Answer 5

Answer №3

The solution you're seeking can be found in the method Array.prototype.concat, which merges two arrays or more into a single new array. Simply use this line of code:

var newArray = firstArray.concat(secondArray);

Answer 6

The solution you're seeking can be found in the method Array.prototype.concat, which merges two arrays or more into a single new array. Simply use this line of code:

var newArray = firstArray.concat(secondArray);

Combining two arrays in Javascript: A step-by-step guide

Answer №1

Answer №2

Answer №3

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