[ruby-it] born_at(1i) ?!?

[Ale Ds]

When I use scaffold,
if I have a datetime field in the model, in the view there is some combo
to set the date and time.

The HTML source has the combos with the names
name="user[born_at(1i)]"
name="user[born_at(2i)]"
name="user[born_at(3i)]"
...

someone can explain how work "born_at(?i) " ? or suggest some page page
who explain than

thank you,
Alessandro
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