How to index a slice element?

问题

I have a slice: Keys []* datastore.Key

How could I index one of them in the template file? I guessed {{.Keys[3] }}, but that doesn't work and I searched a lot but with no clue.

Any suggestions would be welcome, thanks.

回答1:

Use the index command like so:

{{index .Keys 3}}

回答2:

As stated in the html/template package, the majority of examples are actually located in the text/template pkg docs. See http://golang.org/pkg/text/template/

From the docs

index
    Returns the result of indexing its first argument by the
    following arguments. Thus "index x 1 2 3" is, in Go syntax,
    x[1][2][3]. Each indexed item must be a map, slice, or array.

来源：https://stackoverflow.com/questions/12701452/how-to-index-a-slice-element