Merge two JS key value arrays

Question

I need to merge two JS arrays, but using concat fn or lodash library i can't do it...

I have two arrays like these:

[ test2: 'string', test: 'string' ]

[ nome: 'string',test2: 'string', test: 'string' ]

And what i need is to have result array like this:

[ test2: 'string', test: 'string', nome: 'string' ]

How can i do this? i tried several methods withouth success...

Array concat doesn't work...

Thanks

Answer 1

 var obj1 = { 'test2': 'string', 'test': 'string' }; var obj2 = { 'nome': 'string','test2': 'string', 'test': 'string' }; const object3 = {...obj1, ...obj2 } console.log(object3)

If both objects have a property with the same name, then the second object property overwrites the first.

Answer 2

You're using arrays as a key:value pair, but in Javascript that data type is an object. Your two inputs turned into objects look like this:

{ test2: 'string', test: 'string' }

{ nome: 'string', test2: 'string', test: 'string' }

To merge these two objects you can use the ECMAScript 2018 Object Spread syntax.

const obj1 = { test2: 'string', test: 'string' };
const obj2 = { nome: 'string',test2: 'string', test: 'string' };
const newObj = {...ob1, ...ob2}

Note that because your objects share the same name and value pairs, there is only one copy of test:'string' and test2:'string'