Hello, FreeCodeCampers.

I want to ask how we can join nested array.

Let’s say I have:

```
section = [
['section-0-0', 'section-0-1'],
['section-1-0', 'section-1-1']
];
```

I want to apply it to CSS Grid as `grid-template:`

's content. So the inner array will be separated by space, then outer array will be separated by new line. Can I do that?

The semi-result I want is:

```
semiResult = ['section-0-0 section-0-1', 'section-1-0 section-1-1'];
```

The result I want is:

```
finalResult = "'section-0-0 section-0-1'\n'section-1-0 section-1-1'";
```

If it’s in React, I’ve read the rows of gridTemplate can be separated by space. I don’t know if it can be directly manipulated to finalResult or we have to go to semiResult first.

Thanks.

Edit:

I’m afraid it is already covered everywhere but I don’t know how to phrase it because when I search for “how to join nested array” I don’t find any problem like this. Maybe other keywords?