Another question...
If I want to create a table dynamic with columns (4 columns, for example), but that has a single header that involves the entire table. How do I do this?

I understood. I did it in a different way ...
Let's assume that my data is configured like this:

{
"rowsItems": [
[
{"name":"jan", "email": "jan.blaha@foo.com "},
{"name":"Boris", "email": "boris@foo.met"},
{"name":"Pavel", "email": "pavel@foo.met"}
],
],
"columnsItems": ["", ""]
}

I can access the contents of the object by doing this.atributename:
{{this.name}}

And if on the contrary:

"rowsItems": [
["Jan", "jan.blaha@foo.com"],
["Boris", "boris@foo.met"],
["Pavel", "pavel@foo.met"]
],

I had one for each line an object with a name and email? How do I access each attribute?