CODEWITHSUNDEEP
javascript
BlissOfBeing
BlissOfBeing

Reputation: 645

How can I merge arrays that are on the same key javascript?

How can I merge these two objects in javascript?

h1 = {12: [{actor: 'wayne'}, {actor: 'bill'}], 13: [{actor: 'james'}]}
h2 = {13: [{actor: 'mark'}]}

to get:

result = {12: [{actor: 'wayne'}, {actor: 'bill'}], 13: [{actor: 'james'}, {actor: 'mark'}]}

Basically I want to concat the arrays, based on the keys of the objects.

Upvotes: 2

Views: 2405

Answers (1)

Denys Séguret
Denys Séguret

Reputation: 382112

You could do that :

for (var k in h2) {
   h1[k]=(h1[k]||[]).concat(h2[k]);
}

The resulting object would be h1.

Demonstration (open the console)

If you want to left h1 unchanged, do this :

h3 = {};
for (var k in h1) h3[k]=h1[k].slice();
for (var k in h2) h3[k]=(h3[k]||[]).concat(h2[k]);

Upvotes: 6

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