Imagine having 2 arrays of objects that you want to merge in a parallel manner. For instance
var array = [{foo: 2} , {boo: 3}]
var array2 = [{foo2: 2}, {boo2: 4}]
The outcome would be
var array3 = [{foo:2,foo2:2},{boo:3,boo2:4}]
In what way can this be achieved using javascript?
To combine arrays, you could consider using Array.prototype.map alongside Object.assign.
array.map((object, index) => Object.assign(object,array2[index]));
To combine two arrays, you can iterate through one array to select an item and then select the corresponding item from the second array to merge them together.
var fruits = [{apple: 2} , {banana: 3}];
var vegetables = [{carrot: 2}, {celery: 4}];
var combinedArray = fruits.map(function(fruitObj, i){
var veggieObj = vegetables[i];
for (var attr in veggieObj) { fruitObj[attr] = veggieObj[attr]; }
return fruitObj;
});
// combinedArray is the merged array
alert(JSON.stringify(combinedArray));If you're in need of a tool to merge objects in JavaScript, consider checking out Lodash:
var users = {
'data': [{ 'user': 'barney' }, { 'user': 'fred' }]
};
var ages = {
'data': [{ 'age': 36 }, { 'age': 40 }]
};
_.merge(users, ages);
// → { 'data': [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }] }You can find more information about Lodash's merge function here.
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