[go-nuts] how to use index inside range in html/template to iterate through parallel arrays?

In a 'range' dot is set to the value at the index in the ranged array.
Thus your .Second refers to the 'Second' field of the $i'th element of
.First.
You probably want $.Second
"When execution begins, $ is set to the data argument passed to Execute,
that is, to the starting value of dot."

eg.

{{range $i, $e := .First}}$e - {{index $.Second $i}}{{end}}