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# `concat()`
The concat method is used to merge two or more collections/arrays/objects:
_You can also `concat()` an array of objects, or a multidimensional array_
```js
const collection = collect([1, 2, 3]);
let concatenated = collection.concat(['a', 'b', 'c']);
concatenated = concatenated.concat({
name: 'Mohamed Salah',
number: 11,
});
concatenated.all();
// [1, 2, 3, 'a', 'b', 'c', 'Mohamed Salah', 11]
```
[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/concat.js)