Hello,

I need to construct a DataFrame similar to:

```
df=DataFrame([
String, String, String, ...
],
[
:cod_1, :cod_2, :cod_3, cod_...
],
0);
```

where the number of String is huge. So, by supposing that this number is N, how to construct df with a loop similar to:

```
df=DataFrame([
for k in 1:N String
],
[
for k in 1:N string("cod_",k)
],
0);
```

Of, course, the previous code does not work. Could you tell me the right way for such a code ? Thanks !